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超电导材料和未来社会
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作者 冯卓津 《甘肃科技情报》 1989年第5期58-59,61,共3页
关键词 电导材料 电导
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混合电导陶瓷材料研究进展 被引量:3
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作者 杨志宾 韩敏芳 +2 位作者 袁燕 缪文亭 王启宝 《真空电子技术》 2006年第4期46-50,共5页
一些氧化物具有良好的离子导电性能和电子导电性能,这种物质被称为混合离子-电子导体,即混合电导材料。此类材料可以是单相材料,也可以是复相材料。通常制成薄膜状或管状,用于固体氧化物燃料电池和氧传感器的电极材料,也可以作为透氧膜... 一些氧化物具有良好的离子导电性能和电子导电性能,这种物质被称为混合离子-电子导体,即混合电导材料。此类材料可以是单相材料,也可以是复相材料。通常制成薄膜状或管状,用于固体氧化物燃料电池和氧传感器的电极材料,也可以作为透氧膜材料。文中介绍了混合电导材料的结构、粉料及坯体的制备方法及应用,展望了今后的发展方向。 展开更多
关键词 混合电导陶瓷材料 透氧膜 同体氧化物燃料电池 氧传感器
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环氧树脂非线性电导复合材料表面电荷与沿面闪络特性研究 被引量:7
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作者 李昂 张苗苗 《绝缘材料》 CAS 北大核心 2018年第6期26-31,共6页
针对直流气体绝缘金属封闭开关设备(GIS)盆式绝缘子表面电荷积累与沿面闪络的问题,制备了不同Si C质量分数的环氧树脂非线性电导复合材料,研究了Si C含量对Si C/环氧树脂非线性电导复合材料的体电导率、表面电荷、沿面闪络电压等相关特... 针对直流气体绝缘金属封闭开关设备(GIS)盆式绝缘子表面电荷积累与沿面闪络的问题,制备了不同Si C质量分数的环氧树脂非线性电导复合材料,研究了Si C含量对Si C/环氧树脂非线性电导复合材料的体电导率、表面电荷、沿面闪络电压等相关特性的影响。结果表明:Si C质量分数大于50%的环氧树脂复合材料试样在高电场下呈现非线性电导特性。随着Si C含量和外加直流电场强度的增加,Si C/环氧树脂复合材料的表面电位增加量明显下降。Si C质量分数大于50%的环氧树脂复合材料在高电场下对其表面电荷积累具有抑制作用,减少了沿面闪络现象的发生。 展开更多
关键词 直流GIS盆式绝缘子 环氧树脂 非线性电导复合材料 表面电荷 沿面闪络
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非线性均压材料的设计理论与参数调控 被引量:16
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作者 何金良 杨霄 胡军 《电工技术学报》 EI CSCD 北大核心 2017年第16期44-60,共17页
具有非线性电学参数的材料,其电导率或介电常数能够随着空间电场做出自适应的改变,从而达到智能改善绝缘介质空间电场分布均匀性的效果,可用于缓解高压设备局部集中的高电场。目前,国内外已经能够制备出具有高稳定水平的非线性电导特性... 具有非线性电学参数的材料,其电导率或介电常数能够随着空间电场做出自适应的改变,从而达到智能改善绝缘介质空间电场分布均匀性的效果,可用于缓解高压设备局部集中的高电场。目前,国内外已经能够制备出具有高稳定水平的非线性电导特性的材料,如以氧化锌压敏微球为填料,以绝缘材料为基体的复合物。该文详细综述了国际上对于非线性电导材料均压的设计理论,介绍了如何根据实际改善电场分布的需求选择非线性均压材料的参数。在此基础上,总结国际上学者对于在材料制备过程中调控材料非线性参数以满足均压设计需求的研究工作。本文也对非线性均压材料在应用于实际高压设备方面的进展做了简单介绍。 展开更多
关键词 非线性电导材料 均压设计理论 性能调控 填料体积分数 压敏电场
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有机硅聚合物功能材料的研究与应用 被引量:4
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作者 雷艳秋 孙争光 黄世强 《有机硅材料》 CAS 2004年第1期27-31,共5页
综述了聚硅烷和聚硅氧烷作为一种新型的功能材料在光、电、声、磁学领域中的研究与应用。主要介绍了聚硅烷的电子结构、光吸收特性及其在光材料、电导材料中的开发与应用 ,并详细叙述了聚硅烷作为三阶非线性光学材料的研究及其发展方向。
关键词 有机硅聚合物 聚硅烷 材料 材料 非线性光学材料 功能材料 电导材料 电子结构
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时变温差工况下直流GIL/GIS盆式绝缘子动态电场畸变抑制 被引量:2
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作者 杜伯学 姚航 +1 位作者 梁虎成 董佳楠 《电工技术学报》 EI CSCD 北大核心 2024年第9期2851-2859,共9页
为了优化时变温差工况下直流GIL/GIS盆式绝缘子的沿面电场分布,基于表层电导梯度材料(σ-SFGM)设计了以室温(RT)电场均化为目标的RT-SFGM绝缘子与兼顾不同温度梯度(GT)条件的GT-SFGM绝缘子。迭代优化后,RT-SFGM绝缘子的涂层厚度从导体... 为了优化时变温差工况下直流GIL/GIS盆式绝缘子的沿面电场分布,基于表层电导梯度材料(σ-SFGM)设计了以室温(RT)电场均化为目标的RT-SFGM绝缘子与兼顾不同温度梯度(GT)条件的GT-SFGM绝缘子。迭代优化后,RT-SFGM绝缘子的涂层厚度从导体到外壳梯度减小,而GT-SFGM绝缘子的凸面涂层厚度则呈现U型梯度分布。室温条件下,均匀绝缘子的凹面高压三结合点处电场畸变严重,相同位置处的RT-SFGM绝缘子与GT-SFGM绝缘子电场强度分别下降了53.3%和49.5%。随着高压导体温度的上升,绝缘子最大电场位置逐渐向接地外壳附近转移。在40℃温差条件下,GT-SFGM绝缘子的电场畸变抑制效果明显优于RT-SFGM绝缘子,最大电场强度下降59.2%。在负荷加载与负荷波动工况下,GT-SFGM绝缘子的电场变化率分别仅为7%与13.1%,可实现时变温差工况下绝缘子直流电场分布的稳定控制。 展开更多
关键词 直流 GIL/GIS绝缘子 表面电导梯度材料 时变温差 电场均化
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美科学家研制出新型高温超导材料
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《功能材料信息》 2013年第1期63-63,共1页
如果这种新材料预示着新事物的到来,那么这个世界将很快看到超导体的实际应用,为医学、技术、运输以及能源等领域带来改善。威斯康辛大学材料科学与工程学教授Chang-Beom Eom所带领的一个科学家团队已经开发出一种独特的多层超导体,... 如果这种新材料预示着新事物的到来,那么这个世界将很快看到超导体的实际应用,为医学、技术、运输以及能源等领域带来改善。威斯康辛大学材料科学与工程学教授Chang-Beom Eom所带领的一个科学家团队已经开发出一种独特的多层超导体,它能够传输大量的电流。他们的这种创新材料具备在高温下操作的能力。大多数超电导材料通常含有传导性元素, 展开更多
关键词 高温超导材料 科学家 材料科学 电导材料 材料 超导体 工程学 Eom
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功能性木质炭素新材料的研究与开发
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作者 黄彪 高尚愚 《炭素技术》 CAS CSCD 2004年第3期21-21,共1页
关键词 功能性木质炭素材料 吸着特性 环境净化 木陶瓷 木质吸油材料 电导材料
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发展中的功能性材料 被引量:1
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作者 方震 《江苏电器》 2003年第4期45-48,共4页
新材料的开发,是促进科学技术发展中的先导.它的出现为高新科技的研发提供了最重要的基本手段.催化技术、(新型催化剂)微观电子学、宇宙工艺学、以及航空航天、海洋开发……等被誉为21世纪的前沿技术,哪一项都与新型材料的开发有着密不... 新材料的开发,是促进科学技术发展中的先导.它的出现为高新科技的研发提供了最重要的基本手段.催化技术、(新型催化剂)微观电子学、宇宙工艺学、以及航空航天、海洋开发……等被誉为21世纪的前沿技术,哪一项都与新型材料的开发有着密不可分的关系.功能性材料在近几年来得到了极大的发展,按照所涉及的领域进行分类,大致可分为十一个大类,120多个不同的品种. 展开更多
关键词 功能性材料 电导性功能性材料 防蚀性 发展
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多层圆柱形磁屏体磁屏蔽特性研究 被引量:7
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作者 张晚英 施乐 +3 位作者 张杰峰 刘东辉 申鸿哲 胡雪峰 《湖南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2017年第8期84-90,共7页
根据高磁导率铁材料和高电导率材料的电磁屏蔽特性,将铜绕组缠绕在铁芯上,圆柱形屏蔽体壳放入由铜绕组产生的均匀磁场中,利用三维有限元法对圆柱形屏蔽体壳的磁屏蔽特性进行了研究.分析磁屏蔽体厚度、屏蔽体的层数和激励频率对磁屏蔽效... 根据高磁导率铁材料和高电导率材料的电磁屏蔽特性,将铜绕组缠绕在铁芯上,圆柱形屏蔽体壳放入由铜绕组产生的均匀磁场中,利用三维有限元法对圆柱形屏蔽体壳的磁屏蔽特性进行了研究.分析磁屏蔽体厚度、屏蔽体的层数和激励频率对磁屏蔽效能的影响,以解决采用高磁导率材料和高电导率材料等不同磁屏蔽材料磁屏蔽体的最佳磁屏蔽方案问题.探索提高磁屏蔽效率的新技术,对电磁兼容问题的解决具有重要理论和实际意义. 展开更多
关键词 电磁屏蔽效能 磁屏蔽材料 圆柱形屏蔽体 高磁导率材料 电导材料 Ansoft有限元
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近红外敏感的功能分离型有机光接受体系的光导性能研究Ⅰ.酞菁氧钒晶粒尺寸对其体系光导性能的影响
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作者 刘广宁 王艳乔 +1 位作者 任德源 邱家白 《感光科学与光化学》 CSCD 1995年第4期362-365,共4页
近红外敏感的功能分离型有机光接受体系的光导性能研究Ⅰ.酞菁氧钒晶粒尺寸对其体系光导性能的影响刘广宁,王艳乔,任德源,邱家白(中国科学院化学研究所,北京100080)关键词酞菁氧钒,电照相,光接受器件激光打印和静电复印... 近红外敏感的功能分离型有机光接受体系的光导性能研究Ⅰ.酞菁氧钒晶粒尺寸对其体系光导性能的影响刘广宁,王艳乔,任德源,邱家白(中国科学院化学研究所,北京100080)关键词酞菁氧钒,电照相,光接受器件激光打印和静电复印技术是当今信息处理、加工与传递的重... 展开更多
关键词 酞菁氧钒 光接受器件 光导性能 电导材料
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Arc erosion behaviors of AgSnO_2 contact materials prepared with different SnO_2 particle sizes 被引量:10
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作者 张苗 王献辉 +2 位作者 杨晓红 邹军涛 梁淑华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第3期783-790,共8页
To clarify the effect of SnO2 particle size on the arc erosion behavior of AgSnO2 contact material, Ag?4%SnO2 (mass fraction) contact materials with different sizes of SnO2 particles were fabricated by powder metallur... To clarify the effect of SnO2 particle size on the arc erosion behavior of AgSnO2 contact material, Ag?4%SnO2 (mass fraction) contact materials with different sizes of SnO2 particles were fabricated by powder metallurgy. The microstructure of Ag?4%SnO2 contact materials was characterized, and the relative density, hardness and electrical conductivity were measured. The arc erosion of Ag?4%SnO2 contact materials was tested, the arc duration and mass loss before and after arc erosion were determined, the surface morphologies and compositions of Ag?4%SnO2 contact materials after arc erosion were characterized, and the arc erosion mechanism of AgSnO2 contact materials was discussed. The results show that fine SnO2 particle is beneficial for the improvement of the relative density and hardness, but decreases the electrical conductivity. With the decrease of SnO2 particle size, Ag?4%SnO2contact material presents shorter arc duration, less mass loss, larger erosion area and shallower arc erosion pits. 展开更多
关键词 AgSnO_2 contact materials SnO_2 particle size arc erosion electrical conductivity HARDNESS
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高导电性含水玻璃的水热合成
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作者 张襄楷 韩贵 《天津城市建设学院学报》 CAS 2004年第1期65-67,共3页
以锂硼铝硅系统为例研究水热条件下的水化过程,探讨玻璃粉在水热条件下水化过程的规律.通过研究认为,玻璃水化机理首先为H+与玻璃中Li+的互换,其次游离OH—侵蚀玻璃骨架,最后生成的活性基≡Si—O—与水进一步反应.采用IR、XRD分析了含... 以锂硼铝硅系统为例研究水热条件下的水化过程,探讨玻璃粉在水热条件下水化过程的规律.通过研究认为,玻璃水化机理首先为H+与玻璃中Li+的互换,其次游离OH—侵蚀玻璃骨架,最后生成的活性基≡Si—O—与水进一步反应.采用IR、XRD分析了含水玻璃的结构,探讨了水化条件对水化反应的影响,并测得含水玻璃的电导率为1.7×10-4S/cm(室温),而且含水玻璃在300℃以下具有良好的电导性. 展开更多
关键词 含水玻璃 水热热压合成 电导玻璃材料 水化 侵蚀
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CdS Thin Films Deposited by CBD Method on Glass 被引量:1
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作者 何星伟 刘伟丰 +1 位作者 朱长飞 江国顺 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第4期471-476,I0004,共7页
CdS thin films were prepared by chemical-bath-deposited method and the effect of temperature and time on the properties of CdS thin films was studied. Independent of the deposited temperature, the growth was mainly co... CdS thin films were prepared by chemical-bath-deposited method and the effect of temperature and time on the properties of CdS thin films was studied. Independent of the deposited temperature, the growth was mainly controlled by the ion-by-ion growth mechanism at the beginning of the film deposition, then the cluster-by-cluster mechanism came to be dominant. The growth rate increased faster with the increasing of temperature until the thickness reached the limitation, then thickness instead become thinner. The scanning electron micro- scope results revealed that the morphology of the CdS film changed from pinholes to rough, inhomogeneous surface with increasing deposition time and deposition temperature. The X- ray diffraction results showed the film structure was a mixture of two phases: hexagonal and cubic, and it was very important to controll deposition time to the film's crystal phase. All films in depth of approxilnate 100 nm existed above 65% transmittance, the absorption edge became "red-shift" with temperature rising. At 60 and 70℃, with 20 min deposited-time, the energy band gap was more than 2.42 eV and decreased with time, while at 80 and 90℃ the energy band gap was less than 2.42 eV and increased little when the time changed from 10min to 15 nfin at 80℃. 展开更多
关键词 CdS thin film Chemical-bath-deposited method CIGS solar cell Direct energy band gap
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Electric characteristics of Nd_2O_3 doped BaTiO_3 ceramics 被引量:5
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作者 郝素娥 韦永德 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第4期388-391,共4页
Nd2O3 doped BaTiO3ceramics(the additive content was respectively 0.001, 0.002, 0.003, 0.005, 0.01 molar ratio)were prepared by Sol-Gel method to study their dielectric characteristics and electric conductivities thr... Nd2O3 doped BaTiO3ceramics(the additive content was respectively 0.001, 0.002, 0.003, 0.005, 0.01 molar ratio)were prepared by Sol-Gel method to study their dielectric characteristics and electric conductivities through X-ray photoelectron spectrum (XPS). The results showed that the dielectric characteristics of Nd2O3 doped BaTiO3 ceramics were improved by doping. When Nd2O3 content was 0.003 mol, the results were even better, the dielectric constant was increased, the dielectric loss was decreased, the Curie-temperature (Tc) was 110 ℃, and the frequency characteristic was also good. The resistivity of Nd2O3 doped BaTiO3 ceramics was lower than that of pure BaTiO3 ceramics, when Nd2O3 content was 0.001 mol,the resistivity was (2.364×)108 Ω·m, the smallest. The grain resistance of Nd2O3 doped BaTiO3 ceramics exhibited NTC effect, but the grain boundary resistance showed PTC effect, and the grain boundary resistance was larger than that of the grain resistance, so the PTC effect originated from the grain boundary. The analysis of the element binding energy through X-ray photoelectron spectrum were indicated that the quantivalence of Ba2+and Ti4+in Nd2O3 doped BaTiO3 ceramics was variable, and resulted in the improvement of the conductibility of BaTiO3 ceramics. 展开更多
关键词 BaTiO_3 ceramics Nd_2O_3 doped dielectric characteristic electric conductivity
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Influence of graphite particle size and its shape on performance of carbon composite bipolar plate 被引量:1
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作者 张杰 邹彦文 贺俊 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2005年第10期1080-1083,共4页
Bipolar plates for proton exchange membrane fuel cell (PEMFC) where polymer is used as binder and graphite is used as electric filler were prepared by means of compression molding technology. Study on the effects of g... Bipolar plates for proton exchange membrane fuel cell (PEMFC) where polymer is used as binder and graphite is used as electric filler were prepared by means of compression molding technology. Study on the effects of graphite particle size and shape on the bipolar plate performance, such as electrical conductivity, strength, etc. showed that with decrease of graphite particle size, bulk electrical conductivity and thermometric conductivity decreased, but that flexural strength was enhanced. After spherical graphite occurrence in flake-like form, the flexural strength of the bipolar plate was enhanced, electrical conductivity increased but thermal conductivity decreased in direction paralleling pressure direction, and both electrical conductivity and thermometric conductivity reduced in direction perpendicular to pressure direction. 展开更多
关键词 Spherical graphite Fuel cell Bipolar plate Conductive composite materials
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Morphology and conductivity of in-situ PEO-LiClO_4-TiO_2 composite polymer electrolyte 被引量:2
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作者 潘春跃 冯庆 +2 位作者 王丽君 张倩 巢猛 《Journal of Central South University of Technology》 2007年第3期348-352,共5页
PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivit... PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivity of composite polymer electrolyte films were examined by differential scanning calorimetry, scanning electron microscopy, atom force microscopy and alternating current impedance spectroscopy, respectively. The glass transition temperature and the crystallinity of composite polymer electrolytes are decreased compared with those of PEO-LiClO4 polymer electrolyte film. The results show that TiO2 particles are uniformly dispersed in PEO-LiClO4-5%TiO2 composite polymer electrolyte film. The maximal conductivity of 5.5×10、5 Scm at 20 ℃ of PEO-LiClO4-TiO2 film is obtained at 5% mass fraction of TiO2. 展开更多
关键词 polyethylene oxide (PEO) TIO2 composite polymer electrolyte in-situ composite CONDUCTIVITY
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A Study on Ship Deperming Coil System Using High Temperature Superconducting Cable Technology 被引量:1
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作者 Megumi Hirota 《Journal of Shipping and Ocean Engineering》 2017年第3期93-99,共7页
Naval ship deperming is effective to reduce the potential damage from sea mines some of which sense magnetic field of the ship, and thus, is an important treatment of naval ships in the recent world. Large electric cu... Naval ship deperming is effective to reduce the potential damage from sea mines some of which sense magnetic field of the ship, and thus, is an important treatment of naval ships in the recent world. Large electric current is required to impose the magnetic field on the ship hull, which in turn means that the deperming coil needs to be wound on ship hull when the coil is composed of conventional conductive materials, such as copper. We considered a few HTS (high temperature superconducting) coil systems to deperm naval ships because we expect the shorter deperming time and lower manual workload for ship deperming operation, compared conventional conductor coil systems. We have in the past presented a solution using a fiat two-coil system arranged on seabed with tightly bound HTS conductor by analytical calculation of magnetic field on the conductor. By considering present and already developed technologies, a conductor with cylindrically wound on the core arranged as fiat multi-turn coils on seabed was designed using analytical methods. 展开更多
关键词 Deperming seamine SHIP MAGNETIC SUPERCONDUCTING CABLE
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Electro-conductive Nanocrystalline Cellulose Film Filled with TiO_2-ReducedGraphene Oxide Nanocomposite 被引量:5
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作者 RuoNan Zhao YanJun Tang +2 位作者 XiaoChuang Shen XingHua Hong YiMing Zhou 《Paper And Biomaterials》 2018年第4期26-34,共9页
Imparting electro-conductive properties to nanocellulose-based products may render them suitable for applications in electronics, optoelectronics, and energy storage devices. In the present work, an electro... Imparting electro-conductive properties to nanocellulose-based products may render them suitable for applications in electronics, optoelectronics, and energy storage devices. In the present work, an electro-conductive nanocrystalline cellulose (NCC) film filled with TiO2-reduced-graphene oxide (TiO2-RGO) was developed. Initially, graphene oxide (GO) was prepared using the modified Hummers method and thereafter photocatalytically reduced using TiO2 as a catalyst. Subsequently, an electro-conductive NCC film was prepared via vacuum filtration with the as-prepared TiO2-RGO nanocomposite as a functional filler. The TiO2-RGO nanocomposite and the NCC/TiO2-RGO film were systematically characterized. The results showed that the obtained TiO2-RGO nanocomposite exhibited reduced oxygen-containing group content and enhanced electro-conductivity as compared with those of GO. Moreover, the NCC flm flled with TiO2-RGO nanocomposite displayed an electro-conductivity of up to 9.3 S/m and improved mechanical properties compared with that of the control. This work could provide a route for producing electro-conductive NCC flms, which may hold signifcant potential as transparent ?exible substrates for future electronic device applications. 展开更多
关键词 nanocrystalline cellulose nanocomposite film graphene oxide photocatalytic reduction electro-conductivity
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Hole transport and phonon scattering in epitaxial PbSe films
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作者 Jian-xiao SI Hui-zhen WU +1 位作者 Tian-ning XU Chun-fang CAO 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第1期137-142,共6页
The combined characterizations of mobility and phonon scattering spectra allow us to probe hole transport process in epitaxial PbSe crystalline films grown by molecular beam epitaxy (MBE). The measurements of Hall eff... The combined characterizations of mobility and phonon scattering spectra allow us to probe hole transport process in epitaxial PbSe crystalline films grown by molecular beam epitaxy (MBE). The measurements of Hall effect show p-type con- ductivity of PbSe epitaxial films. At 295 K, the PbSe samples display hole concentrations of (5~8)×1017 cm–3 with mobilities of about 300 cm2/(V·s), and at 77 K the hole mobility is as high as 3×103 cm2/(V·s). Five scattering mechanisms limiting hole mobilities are theoretically analyzed. The calculations and Raman scattering measurements show that, in the temperatures between 200 and 295 K, the scattering of polar optical phonon modes dominates the impact on the observed hole mobility in the epitaxial PbSe films. Raman spectra characterization observed strong optical phonon scatterings at high temperature in the PbSe epitaxial films, which is consistent with the result of the measured hole mobility. 展开更多
关键词 Electrical properties of PbSe MOBILITY Scattering mechanism
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