电介质
介电损耗
材料科学
热传导
聚合物
酮
大气温度范围
活化能
化学
光电子学
复合材料
热力学
有机化学
物理
作者
Jilin Pan,Kun Li,Junjun Li,Tim Hsu,Qing Wang
摘要
The dielectric constant and loss of poly(ether ketone ketone) have been investigated over a range of frequency and temperature. A linear correlation between the ac conductance and the angular frequency implies that the hopping as a dominant conduction process contributes to the dielectric loss. The energy density and discharged efficiency of the polymer were measured at various temperatures. High dielectric strengths (>400 MV/m) at temperatures up to 150 °C have been achieved. The increase of the dielectric loss and reduction in the breakdown field with increasing temperature could be attributed to thermally enhanced conduction of charge carriers in the polymer.
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