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TiO2-based photocatalysts prepared by oxidation of TiN nanoparticles and their photocatalytic activities under visible light illumination 认领 引用 被引量：4
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作者 Chao Li Weiyi Yang Qi Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第6期969-975,共7页
To develop TiO2-based photocatalysts with visible light activity for better solar energy utilization, a simple flash oxidation method was developed by calcining commercial TiN nanoparticle to prepare N-doped TiO2 phot... To develop TiO2-based photocatalysts with visible light activity for better solar energy utilization, a simple flash oxidation method was developed by calcining commercial TiN nanoparticle to prepare N-doped TiO2 photocatalyst and TiN/TiO2 composite photocatalysts through the modulation of the calcination time and temperature. It was found that more energy and processing time were needed to prepare N-doped TiO2 photocatalyst than that of TiN/TiO2 composite photocatalyst during this process, while TiN/TiO2 composite photocatalyst bad a better visible light absorption/photocatalytic performance than that of N-doped TiO2 photocatalyst prepared from the oxidation of the same TiN precursor. Thus, the preparation of TiN/TiO2 composite photocatalyst from TiN precursor should be a more preferred approach than the preparation of N-doped TiO2 photocatalyst for visible-light-activated photocatalysis for its costeffectiveness. 展开更多
关键词 N-doped TiO2 TiN/TiO2 Localized surface plasmon resonance （LSPR） Visible-light-activated photocatalysis
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Effect of Annealing on Characterization of TiO2-Based DSSC 认领 引用
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作者 Rangga Winantyo Anne Zulfia +1 位作者 Nji Raden Poespawati Djoko Hartanto 《材料科学与工程（中英文A版）》 2012年第2期232-237,共6页
One of the most important parameter that affects Dye-Sensitized Solar Cell （DSSC） characteristics is porosity. There are many aspects that can influence the porosity such as particles size of titanium-dioxide （TiO2... One of the most important parameter that affects Dye-Sensitized Solar Cell （DSSC） characteristics is porosity. There are many aspects that can influence the porosity such as particles size of titanium-dioxide （TiO2）, annealing temperature and processing parameter or fabrication itself. In this paper, one of important parameter will be discussed, i.e., effect of annealing on characterization of TiO2 thin layer. First the TiOe thin film was formed on indium tin-oxide （ITO） glass by stir casting process using doctor balde to make thin layer on ITO glass, second the thin film was annealed at different temperature start from 100 ℃, 150 ℃, 200 ℃, 300 ℃ and 350 ℃ for 30 min. The samples then were characterized both microstructural analysis and electrical propertie. It is found that annealing at 200 ℃ was optimum condition due to porosity content of 32% which has good in electrical properties such as fill factor, conductivity, open-circuit voltage （Voc） and short-circuit current （Isc）, respectively. 展开更多
关键词 退火温度 TiO2 表征 ITO导电玻璃 染料敏化太阳能电池 铟锡氧化物 薄膜层 工艺参数
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Preparation and Application of TiO2-Based Semiconductors as Photocatalysts Activated under UV and Visible Light Irradiation 认领 引用
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作者 Slavcho K. Rakovsky Vesselin I. Iliev +2 位作者 Alexander E. Eliyas Metody P. Anachkov Dushan Jovanovic 《材料科学与工程（中英文B版）》 2012年第12期640-649,共10页
The present paper reports research work, aimed at improving the properties of TiO2 semi-conducting materials, known so far to be the best photocatalysts under UV-light illumination. The experimentation was focused on ... The present paper reports research work, aimed at improving the properties of TiO2 semi-conducting materials, known so far to be the best photocatalysts under UV-light illumination. The experimentation was focused on addition of SiO2 dopant to the TiO2, using a modification of the sol-gel method. This approach allows improving the TiO2 degree of crystallinity by heating at high temperature without affecting the transition of anatase into rutile, which would deteriorate the photocatalytic activity. The photocatalytic activity was tested in wastewater purification using the azo dye Acid Black 194 （applied for coloring textiles） as model pollutant. The synthesized photocatalyst samples were characterized by a complex set of physical methods, including single point BET method, XRD and XPS. Spectrophotometry was used to monitor the course of the photocatalytic reaction. The use of tetraisopropyl orthotitanate as Ti precursor yields a mixture of anatase and rutile, possessing the highest photocatalytic activity. The efficiency of TiO2, supported on glass wool, is superior to that of TiO2, supported on quartz glass. 展开更多
关键词 半导体光催化剂 可见光照射 TiO2 紫外线 光催化活性 应用 制备 激活
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Modulation of wettability and interfacial reaction between DZ125 superalloy and Al2O3-based ceramic shell:Rare earth oxide doping strategy 认领 引用
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作者 Baohong Kou Wentao Zhou +1 位作者 Yujie Lin Jing Ouyang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第3期933-945,I0007,共13页
To inhibit the interfacial(displacement)reaction between Hf and Al elements in the DZ125 superalloy and the Al2O3 and SiO2 in the Al2O3-based ceramic shell,rare-earth oxides(La2O3 and Y2O3)w... To inhibit the interfacial(displacement)reaction between Hf and Al elements in the DZ125 superalloy and the Al2O3 and SiO2 in the Al2O3-based ceramic shell,rare-earth oxides(La2O3 and Y2O3)were used as dopants into the shell.The effects of dopant types and contents(2 wt%,5 wt%and 8 wt%)on the wettability and interfacial reaction were investigated using the sessile-drop experiment,and the reaction products were analyzed by X-ray diffraction(XRD),a scanning electron microscope(SEM),an electron probe microanalyzer(EPMA)and X-ray photoelectron spectroscopy(XPS),to clarify the mechanism of dopants in the interracial reaction.The results show that increasing the Y2O3 doping content(2 wt%-8 wt%)reduces the surface porosity from 22.39%to 13.43%,and decreases the surface roughness from 3.25 to 2.28μm,which enhances the packing density of the shell surface.In the sintering process(1223 K,2 h),both La2O3 and Y2O3 dopants react with SiO2,forming La2Si2O7 and Y2SiO5 on the shell surface.During the interfacial reaction process(1823 K,40 min),La2Si2O7 decomposes and reacts with Al2O3 and HfO2,resulting in the formation of SiO2·HfO2·La2O3 and Al2O3·HfO2·La2O3 ternary composite oxides within the reaction products.At 8 wt%La2O3 dopant content,the interfacial reaction is exacerbated,resulting in the uneven wettability.Y2SiO5 further reacts with Al2O3 and SiO2 to form SiO2·Al2O3·Y2O3 ternary composite oxides,while Y2O3 combines with Al2O3 to form Al5Y3O12(VAG),which stabilizes the oxides within the shell and inhibits the interfacial reaction,and significantly improves the surface quality of the DZ125 superalloy.As the Y2O3 dopant content increases(2 wt%-8 wt%),the wetting angle increases from 97.8°to 110.6°. 展开更多
关键词 Al2O3-Based ceramic shel DZ125 superalloy Rare earths Dopant Interfacial reaction Wettability
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HfO2-based ferroelectrics for next-generation multi-level non-volatile memory:From fundamentals to prospects 认领 引用
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作者 Binjian Zeng Yahao Xue +4 位作者 Kejun Tan Ji Zou Shuaizhi Zheng Yichun Zhou Min Liao 《Journal of Materiomics》 SCIE EI CSCD 2026年第4期199-213,共15页
Ferroelectric memory has emerged as a highly promising candidate for next-generation non-volatilememory,offering ultra-low power consumption,ultrafast read/write speeds,high reliability,and sig-nificant potential for ... Ferroelectric memory has emerged as a highly promising candidate for next-generation non-volatilememory,offering ultra-low power consumption,ultrafast read/write speeds,high reliability,and sig-nificant potential for high-density integration.Over the past fifteen years in particular,the discovery offerroelectricity in HfO2-based thin films has attracted widespread attention and stimulated substantialprogress in this field.Previous review articles have provided comprehensive summaries of represen-tative advances in the field,covering topics including the origin of ferroelectricity in HfO2,depositionmethods,the performances of HfO2-based ferroelectric thin films and memory devices,as well asprogress in device physics,integration strategies,and emerging applications.However,more recentbreakthroughs in the multi-level devices have not yet been systematically reviewed.These de-velopments are becoming increasingly critical for mass data storage and emerging paradigms such asin-memory computing.In this review,we summarize recent progress in HfO2-based ferroelectric multi-level memories,with a focus on material studies,device designs,and emerging applications.By high-lighting these advances,we aim to delineate both the persistent challenges and opportunities associatedwith this technology,with the goal of inspiring further innovation in the field. 展开更多
关键词 Device-to-device variation Endurance HfO2-Based ferroelectric thin film Multi-level memory Scalability
Effect of active metal oxide dopants on wettability and interfacial reaction between K417G superalloy and Al2O3-based ceramic shell 认领 引用
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作者 Bao-hong KOU Wen-tao ZHOU +1 位作者 Yong-hui PENG Jing OUYANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第1期244-258,共15页
Some active metal oxides(Al2O3,TiO2,and Cr2O3)were selected as dopants to the Al2O3-based ceramic shells for investment casting of K417G superalloy.The effects of dopant types and contents(0,2,5,a... Some active metal oxides(Al2O3,TiO2,and Cr2O3)were selected as dopants to the Al2O3-based ceramic shells for investment casting of K417G superalloy.The effects of dopant types and contents(0,2,5,and 8 wt.%)on the wettability and interfacial reaction between the alloy and shell were investigated by a sessile-drop experiment.The results show that increasing the Al2O3 doping contents(0−8 wt.%)reduces the porosity(21.74%−10.08%)and roughness(3.22−1.34μm)of the shell surface.The increase in Cr2O3 dopant content(2−8 wt.%)further exacerbates the interfacial reaction,leading to an increase in the thickness of the reaction layer(2.6−3.1μm)and a decrease in the wetting angle(93.9°−91.0°).The addition of Al2O3 and TiO2 dopants leads to the formation of Al2TiO5 composite oxides in the reaction products,which effectively inhibits the interfacial reaction.The increase in TiO2 dopant contents(0−8 wt.%)further promotes the formation of Al2TiO5,which decreases the thickness of the interfacial reaction layer(3.9−1.2μm)and increases the wetting angle(95.0°−103.8°).The introduced dopants enhance the packing density of the shell surface,while simultaneously suppress the diffusion of active metal elements from the alloy matrix to the interface. 展开更多
关键词 Al2O3-based ceramic shell K417G superalloy metal oxide dopants interfacial reaction wettability
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Remarkable Enhancement of the Activity and Hydrothermal Stability of a CeO2-Based NH3-SCR Catalyst by Sn Modification 认领 引用 被引量：3
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作者 Ying Zhu Jingjing Liu +5 位作者 Guangzhi He Shaohua Xie Wenpo Shan Zhihua Lian Fudong Liu Hong He 《Engineering》 SCIE EI CSCD 2025年第5期141-150,共10页
Catalytic activity and hydrothermal stability are both crucial for the application of the selective catalytic reduction of NOxwith NH3(NH3-SCR)catalyst in diesel vehicles.In this study,a tin(Sn)-modified Ce-N... Catalytic activity and hydrothermal stability are both crucial for the application of the selective catalytic reduction of NOxwith NH3(NH3-SCR)catalyst in diesel vehicles.In this study,a tin(Sn)-modified Ce-Nb mixed-oxide catalyst was synthesized as an NH3-SCR catalyst for NOxemission control.After the intro-duction of Sn,both the NH3-SCR activity and the hydrothermal stability of the catalyst were remarkably promoted.Even after hydrothermal aging at 1000℃,the developed Ce1Sn2Nb1Oxcatalyst achieved more than 90%NOxconversion at 325-500℃.Various methods,including N2-physisorption,X-ray diffraction,in-situ high-temperature X-ray diffraction,high-resolution transmission electron microscopy,X-ray pho-toelectron spectroscopy,X-ray absorption fine-structure spectroscopy,temperature-programmed reduc-tion of hydrogen,temperature-programmed desorption of ammonia,and density functional theory calculations were used to investigate the promotional effects induced by the Sn species.The characteri-zation results showed that the addition of Sn not only promoted the formation of the Ce-Nb active phase but also improved its thermal stability,contributing to the excellent NH3-SCR performance and hydrothermal stability.This study provides an excellent sintering-resistance catalyst for the application of diesel engine NOxemission control. 展开更多
关键词 SnO2 CeO2-based catalyst NH3-SCR Hydrothermal stability NOxemission control
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Effect of ZrO2-based refractory on non-metallic inclusions in nickel-based superalloy K4169 认领 引用
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作者 Li-Kun Long Lin-Zhu Wang +3 位作者 Xiang Li Chao-Yi Chen Jun-Qi Li Xing Ran 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第2期63-74,共12页
The effects of ZrO2-based refractory materials on non-metallic inclusions in nickel-based superalloy K4169 were systematically investigated.Analytical methods,including X-ray fluorescence,X-ray diffraction,scanning... The effects of ZrO2-based refractory materials on non-metallic inclusions in nickel-based superalloy K4169 were systematically investigated.Analytical methods,including X-ray fluorescence,X-ray diffraction,scanning electron microscopy equipped with energy dispersive spectrometry,and FactSage simulations,revealed that the refractory primarily consisted of ZrO2,MgO,MgO·Al2O3,and Zr1.74Y0.26O3.87 phases.During melting,MgO reacted with[Al]and[O]in the alloy,forming MgO·Al2O3 at the interface.This phase adhered to the superalloy,while ZrO2 phases remained stable.The inclusions in the alloy transformed from Al2O3 to MgO·Al2O3,with variations in size and distribution influenced by location and pressure.FactSage kinetic simulations aligned with experimental findings,elucidating the interaction mechanisms between the alloy and refractory.These results provide insights into optimizing refractory materials for improved cleanliness and performance in nickel-based superalloy production. 展开更多
关键词 ZrO2-based refractory Nickel-based superalloy Non-metallic inclusion Kinetic calculation
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Effect of Ce element on hydrogen storage property of TiMn2-based alloys 认领 引用
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作者 Wenjiao Zhou Tongyue Li +3 位作者 Anjia Zhang Yaheng Zhao Qichen Tang Xiping Song 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第3期971-979,共9页
This study investigates the effect of Ce content on the hydrogen storage properties of Ti0.98Zr0.02Mn1.5Cr0.05V0.43Fe0.09Cex(x=0,0.02,0.04,and 0.06,at%)alloys.Microstructural analysis of these all... This study investigates the effect of Ce content on the hydrogen storage properties of Ti0.98Zr0.02Mn1.5Cr0.05V0.43Fe0.09Cex(x=0,0.02,0.04,and 0.06,at%)alloys.Microstructural analysis of these alloys revealed dendritic microstructures without the segregation of chemical elements,with the C14 Laves phase identified as the dominant phase.After two activation cycles at 4 MPa and 293 K,the alloys exhibited excellent hydrogen absorption properties.The addition of Ce significantly improved the kinetics of the alloys.At x=0.02,the hydrogen absorption capacity reached 90%of its maximum within 137 s at 293 K.Pressure-composition-temperature curves indicated that hydrogen absorption capacity initially increased first and then decreased with increasing Ce content,reaching a maximum value of 1.85wt%at x=0.04.Thermodynamic results demonstrated that the enthalpy and entropy of hydrogen absorption followed a similar trend,which was consistent with the variation in hydrogen storage capacity.Thus,the improvement in hydrogen absorption capacity due to the addition of Ce is attributed to the increase in enthalpy.The increase of the lattice constant in the C14 Laves phase and the deoxidization effect of Ce are expected to be beneficial for the improvement of hydrogen absorption kinetics. 展开更多
关键词 hydrogen storage property TiMn2-based alloys Ce element pressure-composition-temperature curve
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Enhancing polishing property of CeO2-based abrasives by co-doping with lanthanide and fluorine 认领 引用
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作者 Guangda Han Tian Xing +5 位作者 Dingai Xiang Min Cao You Xue Ziyu Yang Jilei Zhu Junjie Xu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2186-2194,I0007,共9页
The development of CeO2-based abrasives that simultaneously deliver faster processing speeds and smoother surfaces remains a significant challenge for semiconductor polishing applications,as it is difficult to make... The development of CeO2-based abrasives that simultaneously deliver faster processing speeds and smoother surfaces remains a significant challenge for semiconductor polishing applications,as it is difficult to make further progress by optimization of solely Ce3+content or particle size.In this work,we engineered lanthanide and fluorine co-doped CeO2-based abrasives to concurrently optimize both particle size and Ce3+content.Fluorine doping effectively reduces the particle size to approximately50 nm while simultaneously enhances the Ce3+concentration.Synergistic optimization is achieved in Fdoped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives due to the additional enhancement of Ce3+content and generation of rare earth oxyfluorides,which can promote the polishing efficiency.Notably,F-doped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives show material removal rates of 540.42 and 789.15 nm/min,which are 1.57 and 2.3 times that of CeO2.K9 substrate polished by F-doped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives exhibits an average surface roughness of 0.091 and 0.018 nm,which are lower than 0.337 nm achieved by pristine CeO2.The results offer guidance for the design and preparation of highperformance CeO2-based abrasives. 展开更多
关键词 CeO2-based abrasives Particle size Ce3+content Synergistic effect Co-doping Rare earths
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Research Progress and Prospects of ZrO2-Based Catalysts in CO2 Hydrogenation 认领 引用
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作者 Hao Deng Fanjun Luo +2 位作者 Gang Feng Rongbin Zhang Runping Ye 《Carbon and Hydrogen》 SCIE CAS CSCD 2025年第4期401-419,共19页
The escalating atmospheric CO2 levels necessitate efficient catalytic technologies for its conversion into value-added chemicals.This review systematically summarizes recent advances in ZrO2-based catalysts for ... The escalating atmospheric CO2 levels necessitate efficient catalytic technologies for its conversion into value-added chemicals.This review systematically summarizes recent advances in ZrO2-based catalysts for CO2 hydrogenation,emphasizing their multifunctional roles beyond conventional supports.Owing to its tunable crystalline phases,abundant oxygen vacancies,and synergistic metal-support interactions,ZrO2 significantly enhances catalytic performance in producing methane,methanol,and other products.Key design strategies,such as phase engineering,morphology control,and the construction of inverse or composite structures,are discussed in relation to their influence on CO2 adsorption,intermediate stabilization,and reaction pathway regulation.Mechanistic insights reveal that ZrO2 facilitates H2 dissociation,promotes hydrogen spillover,and stabilizes active metal species,thereby optimizing product selectivity and catalyst durability.Furthermore,tandem catalytic systems integrating ZrO2 with zeolites demonstrate exceptional potential in steering C-C coupling while suppressing over-hydrogenation.This review not only elucidates structure-activity relationships and kinetic behaviors but also outlines future research directions,including in situ characterization and scalable catalyst design,thereby providing critical guidance for the development of high-performance CO2 hydrogenation catalysts and advancing carbon-neutral fuel and chemical production. 展开更多
关键词 CO2hydrogenation metal-support interactions oxygen vacancies reaction mechanism ZrO2-based catalysts
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Quantitative characterization of reaction behavior between La-bearing FeCrAl melt and CaO–Al2O3–La2O3-based slags and its guidance for design of mold flux 认领 引用
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作者 Lei Fan Tian-peng Qu +1 位作者 De-yong Wang Cheng-jun Liu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第3期646-658,共13页
The reaction behavior between CaO–Al2O3–La2O3-based slags and La-bearing FeCrAl melt was quantitatively characterized,which was further compared with the reaction behavior of CaO–SiO2-based slags.Bas... The reaction behavior between CaO–Al2O3–La2O3-based slags and La-bearing FeCrAl melt was quantitatively characterized,which was further compared with the reaction behavior of CaO–SiO2-based slags.Based on this,the new type of mold flux for La-bearing FeCrAl alloy continuous casting was designed and its basic properties were evaluated.The results showed that the order of reaction degree of fluxing agents in CaO–Al2O3–La2O3-based slags is(Na2O)>(B2O3)>(Li2O),and the percentages of mass change of fluxing agents were 85.8,54.29 and 42.35 wt.%,respectively.Moreover,the addition of(Li2O)and(Na2O)promoted the reaction between(CaO)and[Al],and the reaction degree of the former was weaker than that of the latter,which was due to the greater effect of(Na2O)on the activity of(CaO)and(Al2O3)than(Li2O).Compared with the reactivity of CaO–SiO2-based slags,the percentages of mass change of Al and La caused by slag–steel reaction decreased by 10.63–14.36 and 39.78–50.49 wt.%,respectively.The percentages of mass change of(Al2O3),(La2O3)and(CaO)in slags highest increased by 17.71,17.98,and 7.81 wt.%,respectively.The reactivity of CaO–Al2O3–La2O3-based slags was significantly weakened.Ultimately,the new type of mold flux was designed and the composition range was determined.The fundamental properties of new mold flux basically meet the theoretical requirements for La-bearing FeCrAl alloy continuous casting. 展开更多
关键词 La-bearing FeCrAl melt CaO-Al2O3-La2O3-based slag Reaction behavior Quantitative characterization Mold flux design
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Influence of soaking time on semi-conductivity and nonlinear electrical properties of TiO_2-based varistor ceramics 认领 引用 被引量：4
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作者 孟凡明 《Journal of Chongqing University》 2008年第4期297-301,共5页
We investigated the influence of soaking time on the semi-conductivity and nonlinear electrical properties of TiO2- based varistor ceramic samples. We used a single sintering process and fabricated six disk samples of... We investigated the influence of soaking time on the semi-conductivity and nonlinear electrical properties of TiO2- based varistor ceramic samples. We used a single sintering process and fabricated six disk samples of （Sr, Bi, Si, Ta）-doped TiO2- based varistor ceramics sintered at 1 250℃ for 0.5 h, 1.0 h, 2.0 h, 3.0 h, 4.0 h, and 5.0 h, respectively. The samples were characterized by X-ray diffraction, breakdown voltage, and complex impedance. The results show that as the soaking time increases from 0.5 h to 5.0 h, the breakdown voltage drops before rising while the nonlinear coefficient increases and then decreases. We suggest that, considering both grain semi-conductivity and nonlinear electrical properties of the TiO2-based varistor ceramics, the optimal soaking time is between 2.0 h and 3.0 h. 展开更多
关键词 TiO2-based varistor ceramics nonlinear electrical properties semi-conductivity soaking time
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Magnetic phase transition and magnetocaloric properties in ErB2C compound 认领 引用
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作者 Yingzhe Na Zhaoxing Wang +2 位作者 Zhe Kong Yang Xie Yikun Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期256-261,共6页
The rare-earth(RE)-based materials have been extensively investigated recently regarding their magnetocaloric(MC) responses which are aimed to develop suitable candidate materials for lowtemperature magnetic refrigera... The rare-earth(RE)-based materials have been extensively investigated recently regarding their magnetocaloric(MC) responses which are aimed to develop suitable candidate materials for lowtemperature magnetic refrigeration(MR) applications.We herein fabricated an erbium-based magnetic boride carbide,namely the ErB2C compound,by arc-melting method and unveiled its lowtemperature MC and magnetic phase transition(MPT) properties,through experimental determination and theoretical calculation.The ErB2C compound is confirmed to crystallize in a tetragonal YB2Ctype orthorhombic structure(space group P42/mbc,No.135) and exhibit two successive lowtemperature MPT around 3.9 and 17.0 K,respectively.Large low-temperature conventional and inverse MC responses in ErB2C compound are observed.The determined conventional MC parameters for ErB2C compound mainly including temperature-averaged entropy change/maximum magnetic entropy and refrigerant capacity(field variation of 0-7 T) reach 15.3/15.9 J/(kg·K) and 284.4 J/kg,respectively,which are comparable to some recently reported RE-based materials with notable MC responses a round20 K,making the ErB2C compound maybe considerable for low-temperature MR applications. 展开更多
关键词 Rare earth(RE)-based materials Magnetocaloric(MC)properties Low-temperature magnetic refrigeration(MR) ErB2C compound
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A review of Al2O3-based eutectic ceramics for high-temperature structural materials 认领 引用 被引量：3
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作者 Xu Wang Yujie Zhong Qiaodan Hu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第11期214-232,共19页
Al2O3-based eutectic ceramics are considered as promising candidates for ultra-high-temperature structural materials due to their exceptional thermal stability and mechanical properties.Nonetheless,several chall... Al2O3-based eutectic ceramics are considered as promising candidates for ultra-high-temperature structural materials due to their exceptional thermal stability and mechanical properties.Nonetheless,several challenges must be overcome before they can be widely used.This paper reviews in detail the tailoring of microstructure from the aspect of process parameters,the updated knowledge gained in microstructure(crystallographic orientation,high-resolution interfacial structures)and the latest means of optimizing eutectic microstructure(seed-induced method,introducing low-energy grain boundaries and high-entropy phase).Additionally,the paper explores future techniques for the fabrication of bulk ceramic materials and effective toughening approaches.This review highlights the achievements made especially in the last 15 years,current limitations in Al2O3-based eutectic ceramics,and offers comprehensive insights and strategic guidance for further mechanical breakthroughs. 展开更多
关键词 Al2O3-based eutectic ceramics Eutectic solidification Interfacial structures Mechanical properties High-entropy oxides
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Origin of high strength and good ductility of TiH2-based powder metallurgy titanium alloy with discontinuous lamellar structures 认领 引用 被引量：1
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作者 Hai-rui ZHANG Hong-zhi NIU +3 位作者 Chao YANG Nan XIANG De-liang ZHANG Fu-xiao CHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第10期3342-3356,共15页
A unique discontinuous lamellar microstructure of titanium alloys consisting of lamellar colonies at prior β-Ti grain boundaries and internal interwoven α-laths is prepared by a TiH2-based powder metallurgy metho... A unique discontinuous lamellar microstructure of titanium alloys consisting of lamellar colonies at prior β-Ti grain boundaries and internal interwoven α-laths is prepared by a TiH2-based powder metallurgy method.The α-variants get various crystallographic orientations and become discontinuous during vacuum annealing at 700℃.Remarkably,nanoscale phase δ-TiH compound layers are generated between α-laths and β-strips,so that dislocations are piled up at the α/δ/βinterfaces during tensile deformation.This leads to dislocation slips being confined to individual α-laths,with differentslips and particularly pyramidalslips being activated.The efficiency of wavy slip is promoted and the work hardening rate is enhanced.Finally,the combined effect of dispersed micro-shear bands and lath distortions is considered contributive for alleviating the stress concentration at grain boundaries,resulting in a high-promising synergy of enhanced ultimate tensile strength of 1080 MPa and good elongation to fracture of 13.6%. 展开更多
关键词 TiH2-based powder metallurgy discontinuous lamellar microstructure interfacialδ-TiH phase tensile properties deformation behavior
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Effect of mesoporous FA-SiO2 extracted from fly ash on the structural and photocatalytic properties of g-C3N4-based materials 认领 引用
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作者 Xianhua LI Qingbo YU 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2025年第7期694-706,共13页
To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO2)was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.Thi... To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO2)was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.This produced chemically bonded interacting composite photocatalysts of FA-SiO,and graphitic-phase carbon nitride(g-C3N4).Compared with the spherical silicon dioxide prepared using tetraethyl orthosilicate(TEOS-SiO2),the mesoporous structure of FA-SiO2,allowed DCDA to react in a smaller space,which facilitated the transformation of DCDA to melamine by the thermal degradation kinetics of FA-C3N4/DCDA.This ultimately boosted the formation of an N-atom-removed triazine ring structure and a multistage structure combining lumps and rods in the composite photocatalysts of g-C3N4,and FA-SiO2,which led to a higher visible-light utilization efficiency,a suitable valence-band position,and the photocatalytic activity for methylene blue reaching 3.56 times that of g-C3N4.The findings indicate that mesoporous FA-SiO,has the potential to improve the structural and photocatalytic properties of g-C3N4,-based materials. 展开更多
关键词 Fly ash(FA) FA-SiO2 g-C3N4-based materials Structural and photocatalytic properties
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Suppressing Charge Recombination in ZnO-Nanorod-Based Perovskite Solar Cells with Atomic-Layer-Deposition TiO2 认领 引用 被引量：9
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作者 董娟 许信 +4 位作者 石将建 李冬梅 罗艳红 孟庆波 陈强 《Chinese Physics Letters》 SCIE EI CAS CSCD 2015年第7期210-213,共4页
ZnO nanorods are passivated with a TiO2 interracial layer and applied in the CH3NH3PbI3 perovskite solar cell, which prepared by the atomic layer deposition method show a positive effect on the tiff factor and power c... ZnO nanorods are passivated with a TiO2 interracial layer and applied in the CH3NH3PbI3 perovskite solar cell, which prepared by the atomic layer deposition method show a positive effect on the tiff factor and power conversion efficiency. With TiO2 interracial passivation, the charge recombination in the ZnO/CH3NH3PbI3 interface is effectively suppressed and the maximum power conversion efficiency is enhanced from 11.9% to 13.4%. 展开更多
关键词 ZnO Suppressing Charge Recombination in ZnO-Nanorod-Based Perovskite Solar Cells with Atomic-Layer-Deposition TiO2 TiO
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Effect of CaO/Al2O3 ratio on viscosity and structure of CaO-Al2O3-based fluoride-free mould fluxes 认领 引用 被引量：4
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作者 Qi Wang Ji-an Yang +3 位作者 Chen Zhang De-xiang Cai Jian-qiang Zhang Oleg Ostrovski 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2019年第4期374-384,共11页
The effects of CaO/Al2O3 ratio on viscosity and structure of the CaO-Al2O3-based fluoride-free mould fluxes were investigated with the CaO/Al2O3 ratio varied from 1 to 4 and the content of SiO2 fixed at 7 wt.%. The in... The effects of CaO/Al2O3 ratio on viscosity and structure of the CaO-Al2O3-based fluoride-free mould fluxes were investigated with the CaO/Al2O3 ratio varied from 1 to 4 and the content of SiO2 fixed at 7 wt.%. The increase in the CaO/Al2O3 ratio from 1 to 2 lowered the viscosity of the flux melts. The viscosity increased slightly with the CaO/Al2O3 ratio from 2 to 3, and this increase became significant with further increasing CaO/Al2O3 ratio to 4. Both break temperature and apparent activation energy were found to be increased with the increase in CaO/Al2O3 ratio from 2 to 4. There was no break temperature available in the flux with CaO/Al2O3 ratio of 1. Changing the CaO/Al2O3 ratio from 1 to 2 decreased the apparent activation energy. Equilibrium phases of the fluxes were calculated using FactSage 7.1 and the major phases were found to be varied with the CaO/Al2O3 ratio. Structures of tested mould fluxes were analysed using Fourier transform infrared spectroscopy. The results showed that the increase in the CaO/Al2O3 ratio from 1 to 2 decreased the complexity of the structure, leading to a reduced viscosity. With the increase in the CaO/Al2O3 ratio from 2 to 4, both solid phase precipitation and melt structure contributed to the variation of viscosity. 展开更多
关键词 CaO-Al2O3-based flux CaO/Al2O3 ratio Viscosity Flux structure
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Enhanced synaptic properties in HfO2-based trilayer memristor by using ZrO2-x oxygen vacancy reservoir layer for neuromorphic computing 认领 引用 被引量：1
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作者 Turgun Boynazarov Joonbong Lee +5 位作者 Hojin Lee Sangwoo Lee Hyunbin Chung Dae Haa Ryu Haider Abbas Taekjib Choi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第24期164-173,共10页
Neuromorphic computing devices leveraging HfO2 and ZrO2 materials have recently garnered significant attention due to their potential for brain-inspired computing systems.In this study,we present a novel trilaye... Neuromorphic computing devices leveraging HfO2 and ZrO2 materials have recently garnered significant attention due to their potential for brain-inspired computing systems.In this study,we present a novel trilayer Pt/HfO2/ZrO2-x/HfO2/TiN memristor,engineered with a ZrO2-x oxygen vacancy reservoir(OVR)layer fabricated via radio frequency(RF)sputtering under controlled oxygen ambient.The incorporation of the ZrO2-x OVR layer enables enhanced resistive switching characteristics,including a high ON/OFF ratio(∼8000),excellent uniformity,robust data retention(>105 s),and multilevel storage capabilities.Furthermore,the memristor demonstrates superior synaptic plasticity with linear long-term potentiation(LTP)and depression(LTD),achieving low non-linearity values of 1.36(LTP)and 0.66(LTD),and a recognition accuracy of 95.3%in an MNIST dataset simulation.The unique properties of the ZrO2-x layer,particularly its ability to act as a dynamic oxygen vacancy reservoir,significantly enhance synaptic performance by stabilizing oxygen vacancy migration.These findings establish the OVR-trilayer memristor as a promising candidate for future neuromorphic computing and high-performance memory applications. 展开更多
关键词 HfO2-based trilayer memristor ZrO2-xoxygen vacancy reservoir Synaptic plasticity Non-volatile memory Neuromorphic computing
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