Effect of temperature on electrical behavior of flyash-filled epoxy gradient composites.
Effect of temperature on electrical behavior of flyash-filled epoxy gradient composites.
复制标题
温度对粉煤灰填充环氧梯度复合材料电性能的影响。
DOI：
10.1002/app.22169
复制
发表时间：
2006
影响因子：
3
通讯作者：
D. Jain
中科院分区：
文献类型：
--
作者：
N. Chand;D. Jain
在离心力作用下制备了不同粉煤灰含量的环氧树脂梯度功能复合材料，以获得密度、硬度和电性能的梯度。使用4274 A多频LCR仪测定了温度和频率变化对介电常数（e′）、tan δ和交流电导率的影响。在40至180°C的温度范围内和1至100 kHz的频率范围内进行电测量。结果表明，介电常数和tan δ随温度的升高而增大，随频率的升高而减小。交流电导率随着温度和频率的增加而增加。随着粉煤灰质量分数的增加，粉煤灰颗粒在梯度复合材料富粉煤灰相中的压实程度增加，介电常数e′、tan δ和交流电导率增加。还测定并报道了功能梯度复合材料的海岸D硬度和密度。已经观察到硬度从69到76和密度从1.287到1.41 g/cc的连续增加。© 2006 Wiley Periodicals，Inc.应用聚合物科学杂志100：1269-1276，2006
Functionally gradient composites of epoxy resin having different weight percentages of flyash were prepared under centrifugal force to obtain gradient in density, hardness, and electrical properties. Effect of temperature and frequency variation on dielectric constant (e′), tan δ, and ac conductivity was determined by using a 4274 A Multi-Frequency LCR meter. Electrical measurements were carried out in a temperature range from 40 to 180°C and in a frequency range from 1 to 100 kHz. It was observed that the dielectric constant and tan δ increased with increase in temperature and decreased with increase in frequency. The ac conductivity increases with increase in temperature and frequency. The increased weight percentage of flyash increased the compaction of flyash particle in the flyash-rich phase of graded composites, which would have increased the dielectric constant (e′), tan δ, and ac conductivity. Shore D hardness and density of the functionally gradient composites has also been determined and reported. A continuous increase in the hardness from 69 to 76 and density from 1.287 to 1.41 g/cc has been observed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1269–1276, 2006