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High Temperature Characteristics of 3C-SiC/SiHeterojunctionDiodes Grown by LPCVD
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作者 张永兴 孙国胜 +5 位作者 王雷 赵万顺 高欣 曾一平 李晋闽 李思渊 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2004年第9期1091-1096,共6页
The high temperature (300 ~480K) characteristics of the n-3C-SiC/p-Si heterojunction diodes (HJD) fabr icated by low-pressure chemical vapor deposition on Si (100) substrates are inv estigated.The obtained diode with... The high temperature (300 ~480K) characteristics of the n-3C-SiC/p-Si heterojunction diodes (HJD) fabr icated by low-pressure chemical vapor deposition on Si (100) substrates are inv estigated.The obtained diode with best rectifying properties has 1.8×104 of ratio at room temperature,and slightly rectifying characteristics with 3.1 of rectification ratio is measured at 480K of an ambient temperature .220V of reverse breakdown voltage is acquired at 300K.Capacitance-voltage char acteristics show that the abrupt junction model is applicable to the SiC/Si HJD structure and the built-in voltage is 0.75V.An ingenious equation is employed to perfectly simulate and explain the forward current density-voltage data meas ured at various temperatures.The 3C-SiC/Si HJD represents a promising approach for the fabrication of high quality heterojunction devices such as SiC-emitter heterojunction bipolar transistors. 展开更多
关键词 LPCVD heterojunction diodes high temperature characteristics
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A Study on the Static Characteristics of Typical Composite High Speed On-Off Valves
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作者 陈宝江 曹泛 《Journal of Beijing Institute of Technology》 EI CAS 1994年第1期81+75-81,共8页
Natural properties of high speed on-off valves can be described through their on-off behavior and spool movement (static and oscillating) characteristics. High speed on-off valves can be combined with actuators in sys... Natural properties of high speed on-off valves can be described through their on-off behavior and spool movement (static and oscillating) characteristics. High speed on-off valves can be combined with actuators in systems into four typical types of composite valves whose static characteristics are related not only to the structures of the single valves and the composite ones, but also to the PWM control modes. It is proved that the composite valves have similar features as those of servo valves. The nonlinear specific properties of single valves composited can be completely compensated by the suitable PWM control modes. 展开更多
关键词 electrohydraulic servo systems pulse width modulation static characteristics /high speed on-off valves
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Characteristics of High Temperature Rupture of a Cast Ni-Based Superalloy M963 被引量:7
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作者 Chao YUAN , Xaofeng SUN,Fengshi YIN,Hengrong GUAN,Zhuangqi HU, Qi ZHENG and Yang YU Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第4期425-428,共4页
The rupture behavior of a cast Ni-base superalloy M963 at high temperature has been investi- gated. The microstructure examination shows that there exists a large amount of the carbide and γ-γ' eutectic, which i... The rupture behavior of a cast Ni-base superalloy M963 at high temperature has been investi- gated. The microstructure examination shows that there exists a large amount of the carbide and γ-γ' eutectic, which is very harmful to the mechanical properties of M963 superalloy. The tensile strength of M963 superalloy both at room temperature and at high temperatures is higher than that of K17G alloy, but the tensile ductility of the former is much lower than that of the latter. In tensile fracture process with the high strain rate, the open carbides are the initiation site and the carbide/matrix interface is the propagation path of cracks. But in fracture process with the low strain rate, the carbide/matrix interface and cast microvoids are the initiation sites, and the carbide/matrix interface is the propagation path of cracks. The effective ways to improve ductility of M963 superalloy are also suggested. 展开更多
关键词 characteristics of high Temperature Rupture of a Cast Ni-Based Superalloy M963 CAST high Ni
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Characteristics of highly differentiated granite and metallization of tungsten-tin, rare and rare earth metal in the eastern Nanling region, China 被引量:6
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作者 XIAO Huiliang CHEN Lezhu +5 位作者 FAN Feipeng LI Haili BAO Xiaoming YAO Zhenghong ZHOU Yan CAI Yitao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期100-101,共2页
1 Introduction Massive tungsten-tin,rare and rare earth metals ore deposits were formed with the widespread granite magmatic activity in early Yanshanian period in the eastern Nanling region.Recent studies indicate th... 1 Introduction Massive tungsten-tin,rare and rare earth metals ore deposits were formed with the widespread granite magmatic activity in early Yanshanian period in the eastern Nanling region.Recent studies indicate that the Yanshanian highly differentiated-granite formation is closely related to the deposits of tungsten and tin,rare and rare earth metals mineralization in the region(Xiao 展开更多
关键词 Th high rare and rare earth metal in the eastern Nanling region characteristics of highly differentiated granite and metallization of tungsten-tin China
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High temperature characteristics of AlGaN/GaN high electron mobility transistors 被引量:1
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作者 杨丽媛 郝跃 +5 位作者 马晓华 张进成 潘才渊 马骥刚 张凯 马平 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第11期451-455,共5页
Direct current (DC) and pulsed measurements are performed to determine the degradation mechanisms of A1GaN/GaN high electron mobility transistors (HEMTs) under high temperature. The degradation of the DC character... Direct current (DC) and pulsed measurements are performed to determine the degradation mechanisms of A1GaN/GaN high electron mobility transistors (HEMTs) under high temperature. The degradation of the DC characteristics is mainly attributed to the reduction in the density and the mobility of the two-dimensional electron gas (2DEG). The pulsed measurements indicate that the trap assisted tunneling is the dominant gate leakage mechanism in the temperature range of interest. The traps in the barrier layer become active as the temperature increases, which is conducive to the electron tunneling between the gate and the channel. The enhancement of the tunneling results in the weakening of the current collapse effects, as the electrons trapped by the barrier traps can escape more easily at the higher temperature. 展开更多
关键词 A1GaN/GaN high electron mobility transistor high temperature characteristics TRAPS current collapse
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Martensite Aging Effect and Thermal Cyclic Characteristics in Ti-Pd and Ti-Pd-Ni High Temperature Shape Memory Alloys 被引量:2
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作者 Wei Cai School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 15000k, China Kazuhiro Otsuka Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan E-mail: weicai@hope.hit.edu.cn 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第3期359-362,共4页
The effect of thermal cycling and aging in martensitic state in Ti-Pd-Ni alloys were investigated by DSC and TEM observations. It is shown that the thermal cycling causes the decreases in M, and Af temperatures in Ti5... The effect of thermal cycling and aging in martensitic state in Ti-Pd-Ni alloys were investigated by DSC and TEM observations. It is shown that the thermal cycling causes the decreases in M, and Af temperatures in Ti50Pd50-xNix (x=10, 20, 30) alloys, but no obvious thermal cycling effect was observed in Ti50Pd50Pd40Ni10 alloys and the aging effect shows a curious feature, i.e., the Af temperature does not saturate even after relatively long time aging, which is considered to be due to the occurrence of recovery recrystallization during aging. 展开更多
关键词 Ti Martensite Aging Effect and Thermal Cyclic characteristics in Ti-Pd and Ti-Pd-Ni high Temperature Shape Memory Alloys PD Ni
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CUTTING REGULARITY AND DISCHARGE CHARACTERISTICS BY USING COMPOSITE COOLING LIQUID IN WIRE CUT ELECTRICAL DISCHARGE MACHINE WITH HIGH WIRE TRAVELING SPEED 被引量:11
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作者 LIU Zhidong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第5期41-45,共5页
The analysis of cutting regularity is provided through using and comparing two typical cooling liquids. It is proved that cutting regularity is greatly affected by cooling liquid's washing ability. Discharge characte... The analysis of cutting regularity is provided through using and comparing two typical cooling liquids. It is proved that cutting regularity is greatly affected by cooling liquid's washing ability. Discharge characteristics and theoretic analysis between two electrodes are also discussed based on discharge waveform. By using composite cooling liquid which has strong washing ability, the efficiency in the first stable cutting phase has reached more than 200 mm^2/min, and the roughness of the surface has reached Ra〈0.8 μm after the fourth cutting with more than 50 mm^2/min average cutting efficiency. It is pointed out that cutting situation of the wire cut electrical discharge machine with high wire traveling speed (HSWEDM) is better than the wire cut electrical discharge machine with low wire traveling speed (LSWEDM) in the condition of improving the cooling liquid washing ability. The machining indices of HSWEDM will be increased remarkably by using the composite cooling liquid. 展开更多
关键词 Wire cut electrical discharge machine with high wire traveling speed Composite cooling liquid Discharge characteristic Cutting regularity
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DC Characteristics of Lattice-Matched InAlN/AlN/GaN High Electron Mobility Transistors 被引量:2
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作者 谢生 冯志红 +3 位作者 刘波 敦少博 毛陆虹 张世林 《Transactions of Tianjin University》 EI CAS 2013年第1期43-46,共4页
Lattice-matched InAlN/AlN/GaN high electron mobility transistors (HEMTs) grown on sapphire substrate by using low-pressure metallorganic chemical vapor deposition were prepared, and the comprehensive DC characteristic... Lattice-matched InAlN/AlN/GaN high electron mobility transistors (HEMTs) grown on sapphire substrate by using low-pressure metallorganic chemical vapor deposition were prepared, and the comprehensive DC characteristics were implemented by Keithley 4200 Semiconductor Characterization System. The experimental results indicated that a maximum drain current over 400 mA/mm and a peak external transconductance of 215 mS/mm can be achieved in the initial HEMTs. However, after the devices endured a 10-h thermal aging in furnace under nitrogen condition at 300 ℃, the maximum reduction of saturation drain current and external transconductance at high gate-source voltage and drain-source voltage were 30% and 35%, respectively. Additionally, an increased drain-source leakage current was observed at three-terminal off-state. It was inferred that the degradation was mainly related to electron-trapping defects in the InAlN barrier layer. 展开更多
关键词 indium aluminum nitride gallium nitride sapphire metallorganic chemical vapor deposition high electron mobility transistor DC characteristic thermal aging
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High temperature characteristics of bilayer epitaxial graphene field-effect transistors on SiC Substrate
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作者 何泽召 杨克武 +6 位作者 蔚翠 刘庆彬 王晶晶 李佳 芦伟立 冯志红 蔡树军 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第6期463-467,共5页
In this paper,high temperature direct current(DC) performance of bilayer epitaxial graphene device on SiC substrate is studied in a temperature range from 25℃ to 200℃.At a gate voltage of-8 V(far from Dirac point... In this paper,high temperature direct current(DC) performance of bilayer epitaxial graphene device on SiC substrate is studied in a temperature range from 25℃ to 200℃.At a gate voltage of-8 V(far from Dirac point),the drainsource current decreases obviously with increasing temperature,but it has little change at a gate bias of +8 V(near Dirac point).The competing interactions between scattering and thermal activation are responsible for the different reduction tendencies.Four different kinds of scatterings are taken into account to qualitatively analyze the carrier mobility under different temperatures.The devices exhibit almost unchanged DC performances after high temperature measurements at 200℃ for 5 hours in air ambience,demonstrating the high thermal stabilities of the bilayer epitaxial graphene devices. 展开更多
关键词 epitaxial graphene field-effect transistor high temperature characteristics
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Improved Operation Characteristics for Nonvolatile Charge-Trapping Memory Capacitors with High-κ Dielectrics and SiGe Epitaxial Substrates
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作者 Zhao-Zhao Hou Gui-Lei Wang +4 位作者 Jin-Juan Xiang Jia-Xin Yao Zhen-Hua Wu Qing-Zhu Zhang Hua-Xiang Yin 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第9期95-99,共5页
A novel high-κ~ A1203/HfO2/AI203 nanolaminate charge trapping memory capacitor structure based on SiGe substrates with low interface densities is successfully fabricated and investigated. The memory capacitor exhibit... A novel high-κ~ A1203/HfO2/AI203 nanolaminate charge trapping memory capacitor structure based on SiGe substrates with low interface densities is successfully fabricated and investigated. The memory capacitor exhibits excellent program-erasable characteristics. A large memory window of ~4 V, a small leakage current density of ~2 ×10-6 Acre-2 at a gate voltage of 7V, a high charge trapping density of 1.42 × 1013 cm-2 at a working vo]tage of 4-10 V and good retention characteristics are observed. Furthermore, the programming (△ VFB = 2.8 V at 10 V for 10μs) and erasing speeds (△VFB =-1.7 V at -10 V for 10μs) of the fabricated capacitor based on SiGe substrates are significantly improved as compared with counterparts reported earlier. It is concluded that the high-κ Al2O3/HfO2/Al2O3 nanolaminate charge trapping capacitor structure based on SiGe substrates is a promising candidate for future nano-scaled nonvolatile flash memory applications. 展开更多
关键词 Dielectrics and SiGe Epitaxial Substrates Improved Operation characteristics for Nonvolatile Charge-Trapping Memory Capacitors with high
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SOICMOS Integrated Circuit of Laser Range Finding Working at High Temperatures
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作者 高勇 张新 +3 位作者 刘梦新 安涛 刘善喜 马立国 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2007年第2期159-165,共7页
Modeling analysis of thin fully depleted SOICMOS technology has been done. Using ISETCAD software,the high temperature characteristics of an SOICMOS transistor were simulated in the temperature range of from 300 to 60... Modeling analysis of thin fully depleted SOICMOS technology has been done. Using ISETCAD software,the high temperature characteristics of an SOICMOS transistor were simulated in the temperature range of from 300 to 600K, and the whole circuit of a laser range finder was simulated with Verilog software. By wafer pro- cessing,a circuit of a laser range finder with complete function and parameters working at high temperatures has been developed. The simulated results agree with the test results. The test of the circuit function and parameters at normal and high temperature shows the realization of an SOICMOS integrated circuit with low power dissipation and high speed, which can be applied in laser range finding. By manufacturing this device, further study on high temperature characteristics of shorter channel SOICMOS integrated circuits can be conducted. 展开更多
关键词 silicon on insulator high temperature characteristics TRANSISTOR thin fully depleted
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Physical and mechanical properties of sandstone containing a single fissure after exposure to high temperatures 被引量:19
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作者 Zhu Tantan Jing Hongwen +3 位作者 Su Haijian Yin Qian Du Mingrui Han Guansheng 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第2期319-325,共7页
In order to investigate the physical and mechanical properties of sandstone containing fissures after exposure to high temperatures,fissures with different angles α were prefabricated in the plate sandstone samples,a... In order to investigate the physical and mechanical properties of sandstone containing fissures after exposure to high temperatures,fissures with different angles α were prefabricated in the plate sandstone samples,and the processed samples were then heated at 5 different temperatures.Indoor uniaxial compression was conducted to analyze the change rules of physical properties of sandstone after exposure to high temperature,and the deformation,strength and failure characteristics of sandstone containing fissures.The results show that,with increasing temperature,the volume of sandstone increases gradually while the quality and density decrease gradually,and the color of sandstone remains basically unchanged while the brightness increases markedly when the temperature is higher than 585 ℃;the peak strength of sandstone containing fissures first decreases then increases when the temperature is between 25℃and 400℃.The peak strain of sandstone containing fissures increases gradually while the average modulus decreases gradually with increasing temperature,and the mechanical properties of sandstone show obvious deterioration after 400 ℃.The peak strain of sandstone containing fissures increases gradually while the average modulus decreases gradually with increasing temperature;with increasing angle αof the fissure,the evolution characteristics of the macro-mechanical parameters of sandstone are closely related to the their own mechanical properties.When the temperature is 800 ℃,the correlation between the peak strength and average modulus of sandstone and the angle α of the fissure is obviously weakened.The failure modes of sandstone containing fissures after high temperature exposure are of three different kinds including:tensile crack failure,tensile and shear cracks mixed failure,and shear crack failure.Tensile and shear crack mixed failure occur mainly at low temperatures and small angles;tensile crack failure occurs at high temperatures and large angles. 展开更多
关键词 high temperature Sandstone containing fissure Strength characteristics Deformation characteristics Evolution law
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Experimental Study on Performance of Multidirectional Geogrid and Its Application in Engineering of High Slope 被引量:6
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作者 王清标 WEN Xiaokang +2 位作者 JIANG Jinquan ZHANG Cong SHI Zhenyue 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第4期704-711,共8页
By analyzing the grille mechanical property, tensile strength and creep tests, and the fi eld tests, we investigated the characteristics and the reinforcement principle of multidirectional geogrid, and obtained the ef... By analyzing the grille mechanical property, tensile strength and creep tests, and the fi eld tests, we investigated the characteristics and the reinforcement principle of multidirectional geogrid, and obtained the effect factors of grid characteristics, load and time curve and the shear stress of grille and sand interface. The reinforcement effect of geogrid in combination of typical project cases was illustrated and the following conclusions were presented. Firstly, multidirectional geogrid has ability to resist structural deformation, node distortion or soil slippage under stress, and can effectively disperse load. Secondly, with the increase of tensile rate, grille intensity increases and the creep value also increases with the increase of load. Thirdly, the frictional resistance balance between horizontal thrust of damaged zone and reinforced soil in stable region can avoid slope failure due to excessive lateral deformation. Fourthly, the multidirectional geogrid is able to withstand the vertical, horizontal and diagonal forces by combing them well with three-dimensional orientation, realizing the purpose of preventing soil erosion and slope reinforcement, which has a wide range of application and development in engineering fi eld. 展开更多
关键词 multidirectional geogrid creep characteristics interfacial friction high slope reinforced soil
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Spatial Distribution Characteristics of Surface Tidal Currents in the Southwest of Taiwan Strait 被引量:1
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作者 SHEN Zhiben WU Xiongbin +3 位作者 LIN Hang CHEN Xiaofeng XU Xing’an LI Lun 《Journal of Ocean University of China》 SCIE CAS 2014年第6期971-978,共8页
This study was conducted on the spatial distribution characteristics of surface tidal currents in the southwestern Taiwan Strait based on the quasi-harmonic analysis of current data obtained by two high frequency surf... This study was conducted on the spatial distribution characteristics of surface tidal currents in the southwestern Taiwan Strait based on the quasi-harmonic analysis of current data obtained by two high frequency surface wave radar(HFSWR) systems. The analysis shows that the tidal current pattern in the southwestern Taiwan Strait is primarily semi-diurnal and influenced significantly by shallow water constituents. The spatial distribution of tidal current ellipses of M2 is probably affected by the interaction between two different systems of tide wave, one from the northern mouth of Taiwan Strait and the other from the Bashi Channel. The directions of the major axes of M2 tidal current ellipses coincide roughly with the axis of the Taiwan Strait. The spatial distribution of the magnitudes of the probable maximum current velocity(PMCS) shows gradual increase of the velocity from northeast to southwest, which is in accordance with the spatial distribution of the measured maximum current velocity(MMCS). The directions of the residual currents are in accordance with the direction of the prevailing monsoon wind at the Taiwan Strait and the direction of the Taiwan warm current during summer. The bathymetry also shows a significant effect on the spatial distribution characteristics of tidal currents. 展开更多
关键词 high frequency surface wave radar quasi-harmonic analysis spatial distribution characteristic surface tidal current Taiwan Strait
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Activity and characteristics of "Oxygen-enriched" highly reactive absorbent for simultaneous flue gas desulfurization and denitrification 被引量:2
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作者 Yi ZHAO Tianxiang GUO Zili ZANG 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2015年第2期222-229,共8页
An "Oxygen-enriched" highly reactive absor- bent was prepared by mixing fly ash, lime and a small quantity of KMnO4 for simultaneous desulfiarization and denitrification. Removal of SO2 and NO simultaneously was car... An "Oxygen-enriched" highly reactive absor- bent was prepared by mixing fly ash, lime and a small quantity of KMnO4 for simultaneous desulfiarization and denitrification. Removal of SO2 and NO simultaneously was carried out using this absorbent in a flue gas circulating fluidized bed (CFB). The highest simultaneous removal efficiency, 94.5% of SO2 and 64.2% of NO, was achieved under the optimal experiment conditions. Scanning Electron Microscope (SEM) and Accessory X-ray Energy Spectrometer (EDX) were used to observe the surface characteristics of fly ash, lime, "Oxygen-enriched" highly reactive absorbent and the spent absorbent. An ion chromatograph (IC) and chemical analysis methods were used to determine the contents of sulfate, sulfite, nitrate and nitrite in the spent absorbents, the results showed that sulfate and nitrite were the main products for desulfurization and denitrification respectively. The mechanism of removing SO2 and NO simultaneously was proposed based on the analysis results of SEM, EDX, IC and the chemical analysis methods. 展开更多
关键词 "Oxygen-enriched" highly reactive absorbent Surface characteristics Flue gas circulating fluidized bed Simultaneous desulfurization and denitrification
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Wavelength-Dependent Transient Characteristics Caused by Gain Saturation in Highly Nonlinear Fiber-Based Raman Amplifiers
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作者 Shinobu Tamaoki Tetsufumi Tsuzaki +1 位作者 Motoki Kakui Masayuki Shigematsu 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期417-418,共2页
We have investigated the transient characteristics of discrete Raman Amplifiers and found that the response time caused by gain saturation is dependent upon the wavelength, which corresponds to the effective length of... We have investigated the transient characteristics of discrete Raman Amplifiers and found that the response time caused by gain saturation is dependent upon the wavelength, which corresponds to the effective length of the pump light. 展开更多
关键词 by on length in Wavelength-Dependent Transient characteristics Caused by Gain Saturation in highly Nonlinear Fiber-Based Raman Amplifiers
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High peak power subnanosecond pulse characteristics with different wall structured CNTs in a doubly QML Nd:Lu_(0.15)Y_(0.85)VO_4 laser
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作者 Wenjing Tang Jia Zhao +5 位作者 Kejian Yang Shengzhi Zhao Guiqiu Li Dechun Li Tao Li Wenchao Qiao 《Photonics Research》 SCIE EI 2017年第1期46-51,共6页
By simultaneously employing both an electro-optic modulator and carbon nanotube saturable absorber(CNT-SA)in a dual-loss modulator, a subnanosecond single mode-locking pulse underneath a Q-switched envelope with high ... By simultaneously employing both an electro-optic modulator and carbon nanotube saturable absorber(CNT-SA)in a dual-loss modulator, a subnanosecond single mode-locking pulse underneath a Q-switched envelope with high peak power was generated from a doubly Q-switched and mode-locked(QML) Nd:Lu_(0.15)Y_(0.85)VO_4 laser at1.06 μm for the first time, to our knowledge. CNTs with different wall structures—single-walled CNTs(SWCNTs),double-walled CNTs(DWCNTs), and multi-walled CNTs(MWCNTs)—were used as SAs in the experiment to investigate the single mode-locking pulse characteristics. At pump power of 10.72 W, the maximum peak power of1.312 MW was obtained with the DWCNT. 展开更多
关键词 CNTS VO4 laser high peak power subnanosecond pulse characteristics with different wall structured CNTs in a doubly QML Nd:Lu ND
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Damage characteristics of HfO_2/SiO_2 high reflector at 45° incidence in 1-on-1 and N-on-1 tests
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作者 刘晓凤 李大伟 +3 位作者 赵元安 李笑 凌秀兰 邵建达 《Chinese Optics Letters》 SCIE EI CAS CSCD 2010年第1期41-44,共4页
P-polarization high reflectors are deposited by e-beam from hafnia and silica. 1-on-1 and N-on-1 tests at 1064-nm wavelength with P-polarization at 45° incidence are carried out on these samples. Microscope and s... P-polarization high reflectors are deposited by e-beam from hafnia and silica. 1-on-1 and N-on-1 tests at 1064-nm wavelength with P-polarization at 45° incidence are carried out on these samples. Microscope and scanning electron microscope are applied to investigate the damage morphologies in both 1-on-1 and N-on^l tests. It is found that the laser damage threshold is higher in N-on-1 tests and nodular defect is the main inducement that leads to the damage because nodular ejection with plasma scalding is the typical damage morphology. Similar damage morphology observed in the two tests indicates that the higher laser damage threshold in N-on-1 test is attributed to the mechanical stabilization process of nodular defects, owing to the gradually increased laser fluence radiation. Based on the typical morphology study, some process optimizations are given. 展开更多
关键词 test incidence in 1-on-1 and N-on-1 tests Damage characteristics of HfO2/SiO2 high reflector at 45 high
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High-temperature energy storage dielectric with inhibition of carrier injection/migration based on band structure regulation 被引量:3
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作者 Guang Liu Qingquan Lei +4 位作者 Yu Feng Changhai Zhang Tiandong Zhang Qingguo Chen Qingguo Chi 《InfoMat》 SCIE CSCD 2023年第2期22-33,共12页
Dielectric capacitors have a high power density,and are widely used in military and civilian life.The main problem lies in the serious deterioration of dielectric insulation performance at high temperatures.In this st... Dielectric capacitors have a high power density,and are widely used in military and civilian life.The main problem lies in the serious deterioration of dielectric insulation performance at high temperatures.In this study,a polycarbonate(PC)-based energy storage dielectric was designed with BN/SiO_(2)heterojunctions on its surface.Based on this structural design,a synergistic suppression of the carrier injection and transport was achieved,significantly improving the insulating properties of the polymer film.In particular,the composite film achieves optimal high-temperature energy-storage properties.The composite film can withstand an electric field intensity of 760 MV m^(-1)at 100℃and obtain an energy storage density of 8.32 J cm^(-3),while achieving a breakthrough energy storage performance even at 150℃(610 MV m^(-1),5.22 J cm^(-3)).Through adjustment of the heterojunction structure,free adjustment of the insulation performance of the material can be realized;this is of great significance for the optimization of the material properties. 展开更多
关键词 electron injection and transport HETEROJUNCTION high temperature energy storage characteristics INSULATION POLYCARBONATE
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