复合相导电陶瓷的阻抗谱研究

用低频交流阻抗分析法对相复合导电化陶瓷的导电机构进行了研究，结果表明：导电通路虽由导电相粒子连接而成，但导电相粒子间的接触电阻也是构成样品电阻的重要部分，它随温度上升而下降，使样品呈半导体性。     

测试导电复合材料直流电阻的四端电极法

为了探讨基于网状或环状电极的直流四端电极法在导电复合材料电阻测试中应用的可行性,比较了应用于不同基体、不同导电填料的导电复合材料直流电阻测试的两端电极法和四端电极法,提出了网状或环状电极与导电复合材料之间接触电阻的计算方法并进行了验证.研究表明:基于网状或环状电极的直流四端电极法可消除在直流两端电极法测试中存在的电极与导电复合材料之间的接触电阻;电极与导电复合材料之间接触电阻是非欧姆性的,接触电阻的大小与被测导电复合材料自身性质有关,其数值是可求解的.基于网状或环状电极的直流四端电极法适用于测试导电复合材料的电阻.     

横向脉冲磁场下悬臂导电薄板的动力屈曲

针对处于外加横向强脉冲磁场下的悬臂导电薄板,建立了计及面内电磁体力、磁场、涡电流场和变形场的理论模型.对空间部分采用有限元法,对涡电流、导电薄板的时间部分分别采用Crank-Nicolson法和Newmark法,给出了计算程序的求解步骤,定量模拟了强脉冲磁场对面内磁体力和薄板最大挠度的影响.仿真结果表明,由涡电流与磁场相互作用所产生的面内磁体压力直接导致了悬臂导电薄板发生动力屈曲,导电薄板发生屈曲时临界磁场值随着脉冲参数的减小而减小,但随着电导率的增大而减小.     

不同比例的导电纤维对纱线导电性能的影响

在纯棉纱线中混入不同比例的导电纤维，并对同特数与不同特数纱线的导电性能进行测试和对比，得出导电纤维含量在1．5％～2％时，纱线的导电性能较好．     

烧结对 TiC-堇青石复相陶瓷导电性能的影响研究

用相复合技术制备了导电化陶瓷。通过比较不同工艺参数组合条件下制备的样品的导电性能，发现烧结致密化不是影响样品导电性的主要因素。通过高温烧结过程，改善导电相颗粒的接触状况，降低其间接触电阻，是改善样品导电性的最有效手段。     

悬臂导电薄板磁弹性耦合作用下的磁阻尼分析

针对处于外加磁场作用下的悬臂导电薄板,基于导电介质所满足的电磁学及力学基本定律和方程,建立了描述其力-电-磁耦合作用下几何非线性振动问题的理论模型,并给出了等效阻尼系数的确定方法,定量模拟了面内恒定磁场给涡电流和挠度耦合程度以及磁阻尼强弱所带来的影响。仿真结果表明,随着面内恒定磁场的增加,几何非线性效应和由耦合作用引起的磁阻尼会增强,而等效阻尼系数随着周期或时间是衰减的,并随着面内恒定磁场的增加而增加,这为磁场环境中导电结构的振动控制研究提供了一定的科学依据。     

悬臂导电薄板磁弹性耦合作用下的动力失稳

对于聚变反应堆中受到外加横向强脉冲磁场和面内恒定磁场联合作用下的悬臂导电薄板，建立了描述其力 电 磁耦合作用下动力行为的理论模型.对空间部分采用有限元法，对涡电流、导电薄板的时间部分分别采用Crank Nicolson法和Newmark法，对每一时间步上的耦合非线性采用迭代法，给出了计算程序的求解过程，定量模拟了强脉冲磁场和面内恒定磁场对磁体力和薄板挠度的影响.数值结果显示，外加横向脉冲磁场和面内恒定磁场的联合作用使得结构更容易失稳，导电薄板失稳时横向临界磁场值随着面内恒定磁场的增大而减小，但随着脉冲参数的减小而减小.     

Electrical Conductivity of the Carbon Fiber Conductive Concrete

This paper discussed two methods to enhance the electrical conductivity of the carbon fiber（CF） electrically conductive concrete. The increase in the content of stone and the amount of water used to dissolve the methylcellulose and marinate the carbon fibers can decrease the electrical resistivity of the electrically conductive concrete effectively. Based on these two methods, the minimum CF content of the CF electrically conductive concrete for deicing or snow-melting application and the optimal ratio of the amount of water to dissolve the methylcellulose and marinate the carbon fibers were obtained.     

各向异性导电胶膜的导电粒子电性能研究

各向异性导电胶膜(ACF)连接线路的导电性能对导电粒子的变形影响很大.对ACF粘接后的导电粒子电阻进行了理论模型的建立,分析了导电粒子变形程度对其导电电阻的影响,并与实验结果进行了比较,吻合很好;在高温、高湿环境下,通过对导电粒子回弹进行有限元模拟,得到了导电粒子回弹量;并分析了回弹粒子对导电电阻的影响以及导电粒子的数量对总电阻的影响,得到了各向异性导电胶膜连接的线路最佳的导电粒子变形量和湿热环境对其的导电性能的影响程度.     

Sol-gel-derived hybrid conductive films for electromagnetic interference (EMI) shielding

The conductive nano-sized zinc particles were embedded in an insulating amorphous silica matrix,and the hybrid films were obtained by a sol-gel method.The stable hybrid sol solution was prepared by hydrolysis and condensation of Methyltrimethoxysilane (MTMS) with a one-step acidic catalyst process.Hybrid films were dip-coated on silicon wafer and cured at 120℃ for 60minutes.The structural characterization of hybrid films were investigated by means of attenuated total reflection infrared (ATR-IR) spectroscop...     

导电油墨印刷适性的探讨

导电油墨是一种特殊的油墨,主要用在丝网印刷中。现从国外引进了一种新的导电油墨,本论文试从导电油墨的种类、印刷适性以及导电的稳定性等方面进行探讨。本课题的探讨,不仅可以推动此油墨的广泛应用,而且为以后开发和研制这种油墨提供了参考价值。     

A novel technique for preparation of electrically conductive ABS/Cu polymeric gradient composites

A novel technique for preparing functionally gradient electrically conductive polymeric composites was developed by using of solution casting technique on the principle of Stokes’ law. Acrylonitrilebutadiene-styrene/Cu (ABS/Cu) gradient polymeric composites were prepared successfully using this technique. The gradient structures, electrically conductive performance and mechanical properties of the ABS/Cu composites were investigated. Optical microscope observation shows that the gradient distribution of Cu particles in ABS matrix was formed along their thickness-direction. The electrically conductive testing results indicate that the order of magnitude of surface resistivity was kept in 10₁₅ Ω at ABS rich side, while that declined to 10⁵ Ω at Cu particles rich side, and the percolation threshold was in the range of 2.82 vol%–4.74 vol% Cu content at Cu particles rich side. Mechanical test shows that the tensile strength reduced insignificantly as the content of Cu increases owing to the gradient distribution.     

Effect of curing procedure on the properties of copper-powder-filled conductive adhesives

By means of testing the shear strength with single lap joint, measuring electrical resistivity for cured products and the curing strain with strain gauges, the effect of cure parameters on the properties of HT1012 conductive adhesive filled with copper powder was investigated, and the residual stress in the conductive adhesives was also estimated. The experimental results show that the properties such as shear strength of the adhesives, electrical resistivity of products as well as the residual stress of cured HT 1012 copperfitted conductive adhesive were evidently affected by curing temperature and time. The diagrams of scanning electron microscopy （SEM） and Fourier transform infrared （FT-IR） were also used to determine the properties. The higher mechanical property was achieved under the condition of curing the adhesive 3 h at 60 ℃ as the density of the hydrogen links or linkages existed in the adhesive was relatively higher and the lower electrical resistivity occurred at 80 ℃.     

湿化学法制备ATO/TiO2导电复合粉体包覆机制的研究

采用湿化学共沉淀法,通过在TiO2颗粒表面包覆Sb掺杂SnO2（ATO）制备ATO/TiO2导电粉.运用TG-DSC、XRD、XPS、SEM、BET和电导率等手段对ATO/TiO2导电粉进行了表征.研究结果表明：锡锑混合物xSn（Sb）O2·yH2O以非晶态的形态靠范德华力与静电引力吸附在TiO2表面,煅烧过程中,xSn（Sb）O2·yH2O脱去结晶水吸附或鍵合在TiO2表面.随着TiO2颗粒表面包覆层ATO厚度逐渐增加,ATO/TiO2粉体的电导率逐渐增加.     

聚苯胺/磺化神府煤复合导电材料的合成与表征

用磺化煤作聚苯胺的掺杂剂，通过原位氧化聚合法制备磺化煤／聚苯胺复合导电材料，研究了磺化煤的量、苯胺单体浓度等反应条件对复合导电材料的影响，得出最佳反应条件，并用红外光谱分析了磺化煤对聚苯胺的掺杂作用。     

Piezoresistive characteristic of conductive rubber for flexible tactile sensor

In the research of 2D flexible tactile sensor matrix,pressure-sensitive conductive rubber was developed and tested in which carbon black was used as its conductive phase and silicon rubber as its matrix layer.Experiments were undertaken and the resultant data were used for its piezoresistive characteristics investigation for two kinds of electrode connection configurations,the surface directive connection and embedded connection.It is found that due to the rather strong nonlinearity of the piezoresistive characteristic curves obtained,a higher correlation relationship can be obtained by means of quadratic polynomial fitting.It also showed that the embedded electrode assembling has higher fitting accuracy while the surface directive connection has better mechanical sensitivity.     

聚合物/碳纳米管导电复合材料研究进展

在聚合物基体中加入碳纳米管可以制备综合性能优异的导电聚合物复合材料,而具有取向结构的聚合物/碳纳米管复合材料在光、电、磁、生物功能材料中具有潜在的应用前景.基于碳纳米管的电学性质,综述了聚合物/碳纳米管导电复合材料的三种制备方法(熔融共混法、溶液共混法和原位聚合法)以及国内外研究进展,着重介绍了具有取向结构的聚合物/碳纳米管导电复合体系的制备方法,包括模板组装、力场排列、电场排列以及磁场排列等,并分析比较了各种方法的基本原理和特点.最后对聚合物/碳纳米管导电复合材料的应用情况及研究前景进行了初步的探讨.     

STUDY ON THE CONDUCTING FIBER REINFORCED PLASTIC

The conductive fiber reinforeed plasticwas prepared by dispersing electrical conducting fillerpartieles such as aluminium powder.graphite and carbon black to glass fiber reinforced resin.The effects that eachor double kinds of fillers.alsa the conductive fiber clothhad done on the electrial and mechanical properties of plas-tic composites werer studied,This paper also provided dis-cussion on the conductive mechanism of fiber reinforcedplastic.     

煅烧温度对ATO/TiO_2粉体表面晶化及电导率的影响

用湿化学法在TiO2颗粒表面包覆ATO制得ATO/TiO2复合导电粉;运用TG-DSC、XRD、XPS、SEM、和电导率测试等手段对ATO/TiO2导电粉进行了表征.结果表明：煅烧温度对SnO2的晶化程度、Sb的价态、ATO/TiO2导电粉的导电性产生影响.电导率-温度（lnσ-T）关系呈抛物线（100～900℃）：上坡段（150～400℃）,温度增加,无定形SnO2逐渐晶化,电导率增加,导电性上升,溶入SnO2的Sb3＋→Sb5＋转变,载流子浓度加大,包膜层多孔结构逐渐致密化;底部平台（400～600℃）,SnO2晶化结束,Sb3＋→Sb5＋转变趋于完成,电子散射趋于最低,电导率最大,导电性达到最佳;下坡段（600～900℃）,Sb3＋→Sb5＋转变发生逆转,TiO2基体颗粒长大,锐态型向金红石型转变,破坏包膜结构,电导率上升,导电性恶化.     

An Improvement in Electrical Properties of Asphalt Concerete

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