介绍了一种以黑铅硅矿石为主要填料的新型复合材料的电导率正负温度系数特性.分析了黑铅硅石填充量和电导率的关系以及温度变化对复合材料电导率的影响.结果表明,随着黑铅硅石含量的增加,复合材料电导率逐渐增加,在黑铅硅石含量为55％(质量分数)时电导率出现极大值后开始下降.电导率随温度变化在低于140℃时呈现NTC效应,超过后呈现PTC效应.
参考文献
| [1] | Zhang Xiongwei;Huang Rui .Polymer electrical conductive composites and their application developments[J].Journal of Functional Materials,1994,25(06):492-498. |
| [2] | Shimada S;Akazawa N;Kudo K .Synthesis of β-SiC whiskers from silica black ore[J].Journal of the Ceramic Society of Japan,1996,104(10):992-1003. |
| [3] | Jaunich, M;Stark, W .Monitoring the vulcanization of rubber with ultrasound: Influence of material thickness and temperature[J].Polymer Testing,2009(8):901-906. |
| [4] | Ramsey M H;Potts P J;Webb P C et al.An objective assessment of analytical method precision:comparison of ICP-AES and XRF for the analysis of silicate rocks[J].Chemical Geology,1995,124(1-2):1-19. |
| [5] | Essam J W .Percolation therory[J].Reports on Progress in Physics,1980,43(07):833. |
| [6] | Bennett C H .Serially deposited amorphous aggregates of hard spheres[J].Journal of Applied Physics,1972,43:2727-2734. |
| [7] | Mclachlan D S .An equation for the conductivity of binarymixtures with anisotropic grain structures[J].Journal of Physics C:Solid State Physics,1987,20(07):865. |
| [8] | El-Tantawy F.;Dishovsky N. .Novel V-shaped negative temperature coefficient of conductivity thermistors and electromagnetic interference shielding effectiveness from butyl rubber-loaded boron carbide ceramic composites[J].Journal of Applied Polymer Science,2004(5):2756-2770. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%