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Fast step heterodyne light-induced thermoelastic spectroscopy gas sensing based on a quartz tuning fork with high-frequency of 100 kHz 认领 引用 被引量：4
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作者 Yuanzhi Wang Ying He +4 位作者 Shunda Qiao Xiaonan Liu Chu Zhang Xiaoming Duan Yufei Ma 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第1期36-48,共13页
In this paper,a fast step heterodyne light-induced thermoelastic spectroscopy(SH-LITES)sensor using a high-frequency quartz tuning fork(QTF)with resonant frequency of~100 kHz is reported for the first time.The theoret... In this paper,a fast step heterodyne light-induced thermoelastic spectroscopy(SH-LITES)sensor using a high-frequency quartz tuning fork(QTF)with resonant frequency of~100 kHz is reported for the first time.The theoretical principle of heterodyne LITES(H-LITES)signal generation is analyzed firstly,and an acetylene(C2H2)H-LITES sensor is established to verify its performance.Experimental comparisons between the high-frequency QTF and a standard commercial QTF with resonant frequency of~32.768 kHz reveal that the high-frequency QTF exhibits a tenfold faster response time.Specifically,the H-LITES sensor with this QTF achieves a 33 ms measurement cycle,90%shorter than commercial counterparts.Furthermore,The SH-LITES technique is proposed to further shorten the scanning time to 15 ms,which achieves the shortest LITES measurement time known to date.To demonstrate its advantages in dynamic gas detection,an H2O-LITES system integrating both QTF types is constructed for real-time monitoring of H2O concentration during different respiration patterns.Comparative measurements show that the SH-LITES more accurately captures dynamic H2O concentration fluctuations during respiration,outperforming the commercial QTF-based H-LITES sensor in rapid response scenarios. 展开更多
关键词 fast heterodyne light-induced thermoelastic spectroscopy(H-LITES) high-frequency quartz tuning fork(QTF) step heterodyne light-induced thermoelastic spectroscopy(SH-LITES) respiration detection
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Effects of Fiber Surface Pretreatment and Composite Posttreatment on Mechanical Properties of 2D⁃Cf/Phosphate Geopolymer Matrix Composites 认领 引用
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作者 Peigang He Zhanlin Jia +5 位作者 Shuai Fu Jiatao Wang Xiaoming Duan Zhihua Yang Dechang Jia Yu Zhou 《Journal of Harbin Institute of Technology(New Series)》 CAS 2020年第3期233-242,共10页
Geopolymers are an important class of materials with potential applications because of their heat resistance,flame resistance,environmental friendliness,and possibilities of being transformed into ceramic matrix compo... Geopolymers are an important class of materials with potential applications because of their heat resistance,flame resistance,environmental friendliness,and possibilities of being transformed into ceramic matrix composites at low cost.However,the low mechanical properties as well as the intrinsic brittleness limit their technological implementations,and it is necessary to enhance the mechanical properties of geopolymers by adopting various kinds of reinforcements.In this work,therefore,two⁃dimensional continuous carbon fiber(Cf)reinforced phosphate⁃based geopolymer composites(Cf/geopolymer)were prepared through ultrasonic⁃assisted impregnation method.Effects of acetone treatment and high⁃temperature treatment on the properties of Cf/geopolymer composites were studied by X⁃ray photoelectron spectroscopy(XPS),X⁃ray diffraction(XRD),and scanning electron microscopy(SEM).Results of the study proved that acetone treatment plays a key role in ameliorating the interfacial interaction between Cf and phosphate matrix,which can thus enhance the mechanical properties of Cf/geopolymer composites.The Cf/geopolymer composites prepared by acetone⁃treated Cf had a flexural strength of 156.1 MPa and an elastic modulus of 39.7 GPa in Y direction.Moreover,an additional Sol⁃SiO2 re⁃impregnation treatment could further enhance the mechanical properties of the acetone⁃treated Cf/geopolymer composites by repairing the cracks and filling the pores.The results in this paper not only provide insights into the surface modification of Cf,but also report a facile and low⁃cost preparation route for Cf/geopolymer composites with potential applications in aerospace and defense technology. 展开更多
关键词 geopolymer carbon fiber composite surface modification mechanical properties
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Microstructure Evolution Behavior of Metastable SiBCN Ceramics Prepared by Mechanical Alloying 认领 引用
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作者 Dechang Jia Bin Liang +2 位作者 Pengfei Zhang Zhihua Yang Xiaoming Duan 《功能材料信息》 2016年第1期42-42,共1页
The fully dense amorphous Si-B-C-N monoliths were fabricated at 1000°-1600°C under5 GPa for 30 min where the mechanically alloyed amorphous Si-B-C-N powders were used as raw material.Crystallization and micr... The fully dense amorphous Si-B-C-N monoliths were fabricated at 1000°-1600°C under5 GPa for 30 min where the mechanically alloyed amorphous Si-B-C-N powders were used as raw material.Crystallization and microstructure evolution of the prepared ceramics were 展开更多
关键词 英语 阅读 理解 陶瓷材料
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Effect of SiO_2 Content on the Mechanical and Dielectric Properties of SiBON Composites 认领 引用
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作者 Quan Li Zhihua Yang +2 位作者 Dechang Jia Xiaoming Duan Yu Zhou 《功能材料信息》 2016年第1期50-50,共1页
A novel composite ceramics with excellen mechanical and dielectric properties was fabricated by means of low temperature hot-pressing using mechanically alloyed SiBON powders as raw materials.The influences of SiO_2 c... A novel composite ceramics with excellen mechanical and dielectric properties was fabricated by means of low temperature hot-pressing using mechanically alloyed SiBON powders as raw materials.The influences of SiO_2 content on phase microstructure,mechanical and dielectric properties of the SiBON ceramics were investigated. 展开更多
关键词 英语 阅读 理解 陶瓷材料
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A novel efficient preparation route for BN matrix composites reinforced with Al2O3fibers based on textured design 认领 引用
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作者 Bo Wang Delong Cai +5 位作者 Xiaoming Duan Zhihua Yang Daxin Li Zhenxi Lu Dechang Jia Yu Zhou 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2026年第3期59-69,共11页
Conventional boron nitride(BN)-based composites are often limited by high porosity and long processing cycles,which severely restrict their mechanical performance and engineering applications.To overcome these limitat... Conventional boron nitride(BN)-based composites are often limited by high porosity and long processing cycles,which severely restrict their mechanical performance and engineering applications.To overcome these limitations,a novel organic-inorganic hybrid matrix combined with a hot-compression orientation strategy is proposed.Liquid-phase polyborazylene(PBZ)was employed to promote the rearrangement and alignment of h-BN lamellae during pressing,and subsequent pyrolysis yielded a dense and continuous BN matrix with in situ precipitated nanocrystals serving as loadtransfer nodes.This process significantly enhanced densification,reduced porosity,and enabled the construction of an ordered lamellar structure.Unlike conventional PIP processes that typically require~10 repeated infiltration-pyrolysis cycles,this method achieves dense composites in a single pyrolysis step,effectively avoiding fiber damage and greatly shortening the fabrication cycle.The synergistic effects of aligned lamellae inducing extended crack propagation paths and in situ nanocrystals providing additional load-transfer mechanisms effectively improved the mechanical performance of the composites.The proposed PBZ-assisted hybrid matrix and lamellar-orientation design strategy offers a new and efficient route for developing high-performance BN-based composites with excellent wave-transmitting and thermal protection capabilities. 展开更多
关键词 boron nitride-based composites curing and pyrolysis of polyborazylene lamellar alignment mechanical properties
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Hydrogen-enhanced light-induced thermoelastic spectroscopy sensing 认领 引用 被引量：10
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作者 YING HE YUANZHI WANG +3 位作者 SHUNDA QIAO XIAOMING DUAN HONG QI YUFEI MA 《Photonics Research》 SCIE EI CAS CSCD 2025年第1期194-200,共7页
A hydrogen(H2)-enhanced light-induced thermoelastic spectroscopy(LITES)sensor is proposed for the first time,to our knowledge,in this paper.The enhancement with H2significantly reduces the resonance damping of a... A hydrogen(H2)-enhanced light-induced thermoelastic spectroscopy(LITES)sensor is proposed for the first time,to our knowledge,in this paper.The enhancement with H2significantly reduces the resonance damping of a quartz tuning fork(QTF),leading to a 2.5-fold improvement in the quality factor(Q-factor)to 30,000 without introducing additional noise into the LITES sensor system.Based on the H2-enhancement effect,a self-designed round-head QTF with a low resonance frequency(f0)of 9527 Hz and a fiber coupled multipass cell(MPC)with an optical length of 40 m were utilized to increase the energy accumulation time of QTF and the optical absorption of the target gas,respectively,to demonstrate an ultra-highly sensitive C2H2-LITES sensor.The longterm stability of the H2-enhanced C2H2-LITES sensor was investigated based on Allan deviation analysis.With an optimal integration time of 140 s,the minimum detection limit(MDL)was improved to 290 parts per trillion(ppt).Compared to other reported state-of-the-art C2H2-LITES techniques with similar parameters,this sensor shows a 241-fold improvement in the MDL.This H2-enhancement technique proves to be a highly effective method for achieving a high Q-factor QTF,characterized by its simplicity and efficiency.It offers substantial potential for applications in QTF-based gas sensing. 展开更多
关键词 spectroscopy simplicity light
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Monolithic design of a linearly polarized single-mode Tm-doped fiber laser at 1908 nm with 207 W output 认领 引用
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作者 Jinwen Tang Xiaoxiao Hua +7 位作者 Wenhao Cheng Minglang Wu Disheng Wei Junhui Li Runming Zhang Baoquan Yao Tongyu Dai Xiaoming Duan 《Chinese Optics Letters》 SCIE EI CAS CSCD 2025年第6期98-103,共6页
We report a high-power,all-fiber Tm-doped laser system operating at 1908 nm,based on a master-oscillator power amplifier(MOPA)configuration.The oscillator utilizes two polarization-maintaining(PM)fiber Bragg gratings(... We report a high-power,all-fiber Tm-doped laser system operating at 1908 nm,based on a master-oscillator power amplifier(MOPA)configuration.The oscillator utilizes two polarization-maintaining(PM)fiber Bragg gratings(FBGs)with orthogonal principal axes to achieve single-polarization output.The system generates a linearly polarized output power of 12.6 W,with a slope efficiency of 40.6%.The power is subsequently scaled to 207.6 W through a primary amplifier,which uses a large mode area(LMA)fiber while maintaining single-mode operation.The amplifier achieves a beam quality factor(M2)of 1.36 and a polarization extinction ratio(PER)exceeding 18.3 d B. 展开更多
关键词 high power polarization maintaining single mode Tm-doped fiber amplifier
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Preparation and anisotropic properties of textured structural ceramics:A review 认领 引用 被引量：30
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作者 Zhuo ZHANG Xiaoming DUAN +5 位作者 Baofu QIU Zhihua YANG Delong CAI Peigang HE Dechang JIA Yu ZHOU 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2019年第3期289-332,共44页
Ceramics are usually composed of randomly oriented grains and intergranular phases,so their properties are the statistical average along each direction and show isotropy corresponding to the uniform microstructures.So... Ceramics are usually composed of randomly oriented grains and intergranular phases,so their properties are the statistical average along each direction and show isotropy corresponding to the uniform microstructures.Some methods have been developed to achieve directional grain arrangement and preferred orientation growth during ceramic preparation,and then textured ceramics with anisotropic properties are obtained.Texture microstructures give particular properties to ceramics along specific directions,which can effectively expand their application fields.In this review,typical texturing techniques suitable for ceramic materials,such as hot working,magnetic alignment,and templated grain growth(TGG),are discussed.Several typical textured structural ceramics includingα-Al2O3 and related nacre bioinspired ceramics,Si3N4 and SiAlON,h-BN,MB2 matrix ultra-high temperature ceramics,MAX phases and their anisotropic properties are presented. 展开更多
关键词 texture structural ceramics anisotropic properties strengthening and toughening mechanisms
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Progress of a novel non-oxide Si-B-C-N ceramic and its matrix composites 认领 引用 被引量：20
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作者 Pengfei ZHANG Dechang JIA +2 位作者 Zhihua YANG Xiaoming DUAN Yu ZHOU 《Journal of Advanced Ceramics》 SCIE EI CAS 2012年第3期157-178,共22页
In the past twenty years,Si-B-C-N ceramic has attracted wide attention due to its special structure and outstanding properties.The ceramic generally has an amorphous or a nano-crystalline structure,and has excellent s... In the past twenty years,Si-B-C-N ceramic has attracted wide attention due to its special structure and outstanding properties.The ceramic generally has an amorphous or a nano-crystalline structure,and has excellent structural stability,oxidation resistance,creep resistance and high-temperature mechanical properties,etc.Thus,Si-B-C-N ceramic attracts many researchers and finds potential applications in transportation,aerocraft,energy,information,microelectronics and environment,etc.Much work has been carried out on its raw materials,preparation processes,structural evolution,phase equilibrium and high-temperature properties.In recent years,many researchers focus on its new preparation methods,the preparation of dense ceramic sample with large dimensions,ceramic matrix composites reinforced by carbon fiber or SiC whisker,or components with various applications.Research on Si-B-C-N ceramic will develop our insight into the relationship between structures and properties of ceramics,and will be helpful to the development of novel high-performance ceramics.This paper reviews the preparation processes,general microstructures,mechanical,chemical,electrical and optical properties,and potential applications of Si-B-C-N ceramic,as well as its matrix composites. 展开更多
关键词 Si-B-C-N ceramic preparation method microstructure property
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3D-printed Lunar regolith simulant-based geopolymer composites with bio-inspired sandwich architectures 认领 引用 被引量：9
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作者 Siqi Ma Yuqi Jiang +6 位作者 Shuai Fu Peigang He Chengyue Sun Xiaoming Duan Dechang Jia Paolo Colombo Yu Zhou 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2023年第3期510-525,共16页
Over time,natural materials have evolved to be lightweight,high-strength,tough,and damage-tolerant due to their unique biological structures.Therefore,combining biological inspiration and structural design would provi... Over time,natural materials have evolved to be lightweight,high-strength,tough,and damage-tolerant due to their unique biological structures.Therefore,combining biological inspiration and structural design would provide traditional materials with a broader range of performance and applications.Here,the application of an ink-based three-dimensional(3D)printing strategy to the structural design of a Lunar regolith simulant-based geopolymer(HIT-LRS-1 GP)was first reported,and high-precision carbon fiber/quartz sand-reinforced biomimetic patterns inspired by the cellular sandwich structure of plant stems were fabricated.This study demonstrated how different cellular sandwich structures can balance the structure–property relationship and how to achieve unprecedented damage tolerance for a geopolymer composite.The results presented that components based on these biomimetic architectures exhibited stable non-catastrophic fracture characteristics regardless of the compression direction,and each structure possessed effective damage tolerance and anisotropy of mechanical properties.The results showed that the compressive strengths of honeycomb sandwich patterns,triangular sandwich patterns,wave sandwich patterns,and rectangular sandwich patterns in the Y-axis(Z-axis)direction were 15.6,17.9,11.3,and 20.1 MPa(46.7,26.5,23.8,and 34.4 MPa),respectively,and the maximum fracture strain corresponding to the above four structures could reach 10.2%,6.7%,5.8%,and 5.9%(12.1%,13.7%,13.6%,and 13.9%),respectively. 展开更多
关键词 Lunar regolith simulant(LRS) three-dimensional(3D)printing geopolymer(GP) in situ resource utilization(ISRU) bio-inspired patterns damage tolerance
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Microstructural evolution of h-BN matrix composite ceramics with La-Al-Si-O glass phase during hot-pressed sintering 认领 引用 被引量：9
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作者 Baofu QIU Xiaoming DUAN +9 位作者 Zhuo ZHANG Chen ZHAO Bo NIU Peigang HE Delong CAI Lei CHEN Zhihua YANG Yujin WANG Dechang JIA Yu ZHOU 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2021年第3期493-501,共9页
BN/La-Al-Si-O composite ceramics were fabricated by hot-pressed sintering using hexagonal boron nitride(h-BN),lanthanum oxide(La2O3),aluminia(Al2O3),and amorphous silica(SiO2)as the raw materials.The ef... BN/La-Al-Si-O composite ceramics were fabricated by hot-pressed sintering using hexagonal boron nitride(h-BN),lanthanum oxide(La2O3),aluminia(Al2O3),and amorphous silica(SiO2)as the raw materials.The effects of sintering temperature on microstructural evolution,bulk density,apparent porosity,and mechanical properties of the h-BN composite ceramics were investigated.The results indicated that La-Al-Si-O liquid phase was formed during sintering process,which provided an environment for the growth of h-BN grains.With increasing sintering temperature,the cristobalite phase precipitation and h-BN grain growth occurred at the same time,which had a significant influence on the densification and mechanical properties of h-BN composite ceramics.The best mechanical properties of BN/La-Al-Si-O composite ceramics were obtained under the sintering temperature of 1700℃.The elastic modulus,flexural strength,and fracture toughness were 80.5 GPa,266.4 MPa,and 3.25 MPa·m1/2,respectively. 展开更多
关键词 h-BN matrix composite ceramics La-A1-Si-O glass phase microstructural evolution nanocrystalline precipitation mechanical properties
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Texture and anisotropy of hot-pressed h-BN matrix composite ceramics with in situ formed YAG 认领 引用 被引量：10
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作者 Zhuo ZHANG Xiaoming DUAN +8 位作者 Zhuo TIAN Yujin WANG Lan WANG Lei CHEN Baofu QIU Delong CAI Peigang HE Dechang JIA Yu ZHOU 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2022年第4期532-544,共13页
Textured hexagonal boron nitride(h-BN)matrix composite ceramics were prepared by hotpressing using different contents of 3Y2O3–5Al2O3(molar ratio of 3:5)as the sintering additive.During hot-pressing,the l... Textured hexagonal boron nitride(h-BN)matrix composite ceramics were prepared by hotpressing using different contents of 3Y2O3–5Al2O3(molar ratio of 3:5)as the sintering additive.During hot-pressing,the liquid Y3Al5O12(YAG)phase showing good wettability to h-BN grains was in situ formed through the reaction between Y2O3and Al2O3,and a coherent relationship between h-BN and YAG was observed with[010]h-BN//[111]YAGand(002)h-BN//(321)YAG.In the YAG liquid phase environment formed during hot-pressing,plate-like h-BN grains were rotated under the uniaxial sintering pressure and preferentially oriented with their basal surfaces perpendicular to the sintering pressure direction,forming textured microstructures with the c-axis of h-BN grains oriented parallel to the sintering pressure direction,which give these composite ceramics anisotropy in their mechanical and thermal properties.The highest texture degree was found in the specimen with 30 wt%YAG,which also possesses the highest anisotropy degree in thermal conductivity.The aggregation of YAG phase was observed in the specimen with 40 wt%YAG,which resulted in the buckling of h-BN plates and significantly reduced the texture degree. 展开更多
关键词 hexagonal boron nitride(h-BN) liquid phase sintering texture anisotropy
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First-principles study of the anisotropic thermal expansion and thermal transport properties in h-BN 认领 引用 被引量：7
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作者 Bo Niu Lixiang Zhong +7 位作者 Wei Hao Zhihua Yang Xiaoming Duan Delong Cai Peigang He Dechang Jia Shuzhou Li Yu Zhou 《Science China Materials》 SCIE EI CAS CSCD 2021年第4期953-963,共11页
The thermal expansion coefficient(TEC)and thermal conductivity(k)of thermal fillers are key factors for designing thermal management and thermal protection composite materials.Due to its unique advantages,hexagonal bo... The thermal expansion coefficient(TEC)and thermal conductivity(k)of thermal fillers are key factors for designing thermal management and thermal protection composite materials.Due to its unique advantages,hexagonal boron nitride(h-BN)is one of the most commonly used thermal fillers.However,its TEC and k values are still unclear due to the inconsistency of characterization techniques and sample preparations.In this work,these disputes were addressed using the quasi-harmonic approximation(QHA)method and phonon Boltzmann transport equation(BTE)theory based on the density functional theory(DFT),respectively.The accuracy of our calculated TEC and k values was confirmed by previously reported experimental results,and the underlying physical principles were analyzed from the phonon behaviors.Our TEC results show that the h-BN has small in-plane negative value and large cross-plane positive value,which are-2.4×10-6 and 36.4×10-6 K-1 at 300 K,respectively.And the anisotropic TEC is mainly determined by the anisotropic isothermal bulk modulus and the low-frequency out-of-plane longitudinal phonon modes.We found that the convergence of cutoff radius and q-grid size have significant effect on the accuracy of k of h-BN.Our results show that the in-plane k is much higher than the cross-plane k,and the values at 300 K are 286.6 and 2.7 W m-1 K-1,respectively.The anisotropic phonon group velocity arising from the vibration behaviors of acoustic phonon modes should be primarily responsible for the anisotropic k.Our calculated TEC and k values will provide important references for the design of h-BN composite materials. 展开更多
关键词 h-BN thermal expansion coefficient thermal conductivity phonon behaviors density functional theory
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Microstructure and mechanical properties of SiCf/SiBCN ceramic matrix composites 认领 引用 被引量：6
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作者 Jiaying WANG Zhihua YANG +2 位作者 Xiaoming DUAN Dechang JIA Yu ZHOU 《Journal of Advanced Ceramics》 SCIE EI CAS 2015年第1期31-38,共8页
SiC fiber reinforced SiBCN ceramic matrix composites(CMCs)have been prepared by mechanical alloying and consolidated by hot pressing.During the sintering process,amorphous SiC fibers crystallized seriously and transfo... SiC fiber reinforced SiBCN ceramic matrix composites(CMCs)have been prepared by mechanical alloying and consolidated by hot pressing.During the sintering process,amorphous SiC fibers crystallized seriously and transformed into-SiC.Meanwhile,the interfacial carbothermal reactions caused the strong bonding between the matrix and fibers.As a result,SiCf/SiBCN fractured in a typical catastrophic manner.Room-temperature mechanical properties reached the maximums for the CMC samples sintered at 1900℃/60 MPa/30 min.The density,flexural strength,Young’s modulus and fracture toughness are 2.56±0.02 g/cm3,284.3±17.9 MPa,183.5±11.1 GPa and 2.78±0.14 MPa·m1/2,respectively. 展开更多
关键词 hot pressing composites mechanical properties fiber
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202 W dual-end-pumped Tm:YLF laser with a VBG as an output coupler 认领 引用 被引量：3
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作者 Disheng Wei Shuyi Mi +5 位作者 Ke Yang Junhui Li Jinwen Tang Baoquan Yao Tongyu Dai Xiaoming Duan 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2021年第4期1-6,共6页
We demonstrated a 202 W Tm:YLF slab laser using a reflecting volume Bragg grating(VBG)as an output coupler at room temperature.Two kinds of active heat dissipation methods were used for the VBG to suppress the shift o... We demonstrated a 202 W Tm:YLF slab laser using a reflecting volume Bragg grating(VBG)as an output coupler at room temperature.Two kinds of active heat dissipation methods were used for the VBG to suppress the shift of wavelength caused by its increasing temperature.The maximum continuous wave(CW)output power of 202 W using the microchannel cooling was obtained under the total incident pump power of 553 W,the corresponding slope efficiency and optical-to-optical conversion efficiency were 39.7%and 36.5%,respectively.The central wavelength was 1908.5 nm with the linewidth(full width at half maximum)of 0.57 nm.Meanwhile,with the laser output increasing from 30 to 202 W,the total shift was about 1.0 nm,and the wavelength was limited to two water absorption lines near 1908 nm.The beam quality factors M;were measured to be 2.3 and 4.0 in x and y directions at 202 W. 展开更多
关键词 hundred watt level reflecting volume Bragg grating Tm:YLF laser
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High-power long-wave infrared laser based on polarization beam coupling technique 认领 引用 被引量：2
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作者 Yingjie Shen Chuanpeng Qian +1 位作者 Xiaoming Duan Ruijun Lan 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2020年第2期19-23,共5页
We demonstrated a high-power long-wave infrared laser based on a polarization beam coupling technique.An average output power at 8.3µm of 7.0 W was achieved at a maximum available pump power of 107.6 W,correspond... We demonstrated a high-power long-wave infrared laser based on a polarization beam coupling technique.An average output power at 8.3µm of 7.0 W was achieved at a maximum available pump power of 107.6 W,corresponding to an optical-to-optical conversion of 6.5%.The coupling efficiency of the polarization coupling system was calculated to be approximately 97.2%.With idler single resonance operation,a good beam quality factor of^1.8 combined with an output wavelength of 8.3µm was obtained at the maximum output power. 展开更多
关键词 long-wave infrared laser optical parametric amplifier optical parametric oscillator polarization coupling
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High-energy,alignment-insensitive,injection-seeded Q-switched Ho:yttrium aluminum garnet single-frequency laser 认领 引用 被引量：1
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作者 Dong Yan Yue Yuan +6 位作者 Yunpeng Wang Jiawei Fan Jiaze Wu Xiaoming Duan Sining Li Tongyu Dai Youlun Ju 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2023年第5期157-163,共7页
A high-energy,alignment-insensitive,injection-seeded Q-switched Ho:yttrium aluminum garnet(YAG)singlefrequency laser is developed.Both the slave Q-switched laser and the seed laser are Ho:YAG ring lasers based on a pa... A high-energy,alignment-insensitive,injection-seeded Q-switched Ho:yttrium aluminum garnet(YAG)singlefrequency laser is developed.Both the slave Q-switched laser and the seed laser are Ho:YAG ring lasers based on a pair of corner cubic reflectors.The seed laser has an available power of 830 mW at 2096.667 nm.At 100 Hz,the Q-switched Ho:YAG laser provides a single-frequency pulsed output using injection-seeded technology.The 7.3 mJ single-frequency pulse energy from the slave laser has a pulse width of 161.2 ns and is scaled to 33.3 mJ after passing through the Ho:YAG single-pass amplifier.According to the measurement results of the heterodyne beating technique,the single-frequency pulse has a half-width of 4.12 MHz. 展开更多
关键词 alignment insensitivity corner cubic reflector high energy injection seeding single frequency
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Solvents adjusted pure phase CoCO3 as anodes for high cycle stability 认领 引用 被引量：6
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作者 Liming LIU Xiaoxiao HUANG +8 位作者 Zengyan WEI Xiaoming DUAN Bo ZHONG Long XIA Tao ZHANG Huatao WANG Dechang JIA Yu ZHOU Rui ZHANG 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2021年第3期509-519,共11页
CoCO3 with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries(LIBs).However,the electrochemical performance of CoCO3 itself,especially the cyclic ... CoCO3 with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries(LIBs).However,the electrochemical performance of CoCO3 itself,especially the cyclic stability at high current density,hinders its application.Herein,pure phase CoCO3 particles with different particle and pore sizes were prepared by adjusting the solvents(diethylene glycol,ethylene glycol,and deionized water).Among them,CoCO3 synthesized with diethylene glycol(DG-CC)as the solvent shows the best electrochemical performance owing to the smaller particle size and abundant mesoporous structure to maintain robust structural stability.A high specific capacity of 690.7 mAh/g after 1000 cycles was achieved,and an excellent capacity retention was presented.The capacity was contributed by diverse electrochemical reactions and the impedance of DG-CC under different cycles was further compared.Those results provide an important reference for the structural design and stable cycle performance of pure CoCO3. 展开更多
关键词 lithium ion battery(LIB) cobalt carbonate solvothermal method morphological control solvent pure phase
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Active/passive Q-switching operation of 2 μm Tm,Ho:YAP laser with an acousto-optical Q-switch/MoS_2 saturable absorber mirror 认领 引用 被引量：7
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作者 LINJUN LI XINING YANG +9 位作者 LONG ZHOU WENQIANG XIE YUNLONG WANG YINGJIE SHEN YUQIANG YANG WENLONG YANG WEI WANG ZHIWEI LV XIAOMING DUAN MINGHUA CHEN 《Photonics Research》 SCIE EI CAS 2018年第6期614-619,共6页
The active/passive Q-switching operation of a 2 [tm a-cut Tm,Ho：YAP laser was experimentally demonstrated with an acousto-optical Q-switch/MoS2 saturable absorber mirror. The active Q-switch laser was operated for th... The active/passive Q-switching operation of a 2 [tm a-cut Tm,Ho：YAP laser was experimentally demonstrated with an acousto-optical Q-switch/MoS2 saturable absorber mirror. The active Q-switch laser was operated for the first time, to the best of our knowledge, with an average output power of 12.3 W and a maximum pulse energy of 10.3 mJ. The passive Q-switch laser was also the first acquired with an average output power of 3.3 W and per pulse energy of 23.31 μJ, and the beam quality factors of Mx^2 = 1.06 and My^2 = 1.06 were measured at the average output power of 2 W. 展开更多
关键词 Lasers Q-switched Lasers solid-state
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Microstructural evolution and mechanical properties of in situ nano Ta4HfC5 reinforced SiBCN composite ceramics 认领 引用 被引量：4
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作者 Bingzhu WANG Daxin LI +9 位作者 Zhihua YANG Dechang JIA Jingyi GUAN Hao PENG Delong CAI Peigang HE Xiaoming DUAN Yu ZHOU Tao ZHANG Chenguang GAO 《Journal of Advanced Ceramics》 SCIE EI CAS CSCD 2020年第6期739-748,共10页
The in situ nano Ta4HfC5 reinforced SiBCN-Ta4HfC5 composite ceramics were prepared by a combination of two-step mechanical alloying and reactive hot-pressing sintering.The microstructural evolution and mec... The in situ nano Ta4HfC5 reinforced SiBCN-Ta4HfC5 composite ceramics were prepared by a combination of two-step mechanical alloying and reactive hot-pressing sintering.The microstructural evolution and mechanical properties of the resulting SiBCN-Ta4HfC5 were studied.After the first-step milling of 30 h,the raw materials of TaC and HfC underwent crushing,cold sintering,and short-range interdiffusion to finally obtain the high pure nano Ta4HfC5.A hybrid structure of amorphous SiBCN and nano Ta4HfC5 was obtained by adopting a second-step ball-milling.After reactive hot-pressing sintering,amorphous SiBCN has crystallized to 3C-SiC,6H-SiC,and turbostratic BN(C)phases and Ta4HfC5 retained the form of the nanostructure.With the in situ generations of 2.5 wt% Ta4HfC5,Ta4HfC5 is preferentially distributed within the turbostratic BN(C);however,as Ta4HfC5 content further raised to 10 wt%,it mainly distributed in the grain-boundary of BN(C) and SiC.The introduction of Ta4HfC5 nanocrystals can effectively improve the flexural strength and fracture toughness of SiBCN ceramics,reaching to 344.1 MPa and 4.52 MPa·m1/2,respectively.This work has solved the problems of uneven distribution of ultra-high temperature phases in the ceramic matrix,which is beneficial to the real applications of SiBCN ceramics. 展开更多
关键词 Ta4HfC5 SiBCN microstructure evolution mechanical properties
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