粉体堆积空隙率对介电常数的影响

Analysing for Void Ratio of Packing Powder Influence on Dielectric Constant

通过对不同粒级的石英、方解石、滑石、硅灰石等粉体进行介电性能测量，获得不同频率激励下的电容值和损耗值，分析了粉体粒度及空隙率对粉体堆积态介电常数之间的变化关系。实验结果表明，堆积体空隙率随粒度的增大而提高，堆积态介电损耗随粒度增大而减小，即介电损耗随堆积体空隙率减小而增大。

Through measured the packing powder＇s dielectric constant of the quartz, calcite, talc, wollastonite, to get electric capacity value and loss value under different exciting frequency, and the relations between dielectric constant and void ratio were analysed. Experimental results show that, the dielectric constants were decreased with increaser by void ratio of packing powder.