Polymer composites prove to be the best choice for improving the dielectric properties of polymers. This work mainly focuses on studying the dielectric behavior of polyaryletherketone (PAEK), a high-temperature polymer, and its nanocomposite films with CaCu3Ti4O12 (CCTO) ceramics. The dielectric constant of PAEK improves significantly after the addition of CCTO nanoceramics and shows nearly frequency-independent behavior. The dielectric loss of these nanocomposites is low and is in the range of 0.004–0.006 at room temperature and 1 kHz. Dielectric properties exhibit very good temperature stability up to 150 °C. Activation energies calculated from both electric modulus and conductivity analyses show that the movement of charge carriers is responsible for both relaxation and conduction processes. The conductivity mechanism follows the correlated barrier hopping (CBH) model at low temperatures and the nonoverlapping small polaron tunneling (NSPT) model at high temperatures. Breakdown characteristics are analyzed using Weibull probability distribution. These PAEK/CCTO nanocomposites are proposed as potential materials for high-temperature dielectric applications.

中文翻译：

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流延薄膜挤出工艺制备聚芳醚酮/CaCu3Ti4O12纳米复合薄膜的介电性能


聚合物复合材料被证明是提高聚合物介电性能的最佳选择。本工作主要研究高温聚合物聚芳醚酮（PAEK）及其与 CaCu3Ti4O12（CCTO）陶瓷的纳米复合薄膜的介电行为。添加 CCTO 纳米陶瓷后，PAEK 的介电常数显着提高，并表现出几乎与频率无关的行为。这些纳米复合材料的介电损耗较低，在室温和 1 kHz 下介电损耗在 0.004-0.006 范围内。介电性能在高达 150 °C 的温度下表现出非常好的温度稳定性。根据电模量和电导率分析计算出的活化能表明，电荷载流子的运动负责弛豫和传导过程。电导率机制遵循低温下的相关势垒跳跃（CBH）模型和高温下的非重叠小极化子隧道（NSPT）模型。使用威布尔概率分布分析击穿特性。这些 PAEK/CCTO 纳米复合材料被提议作为高温介电应用的潜在材料。