多层铁电陶瓷击穿分析及优化

王强; 王文斗; 谢龙; 蒋吉昊; 刘高旻

doi:doi:10.3788/hplpb20122403.0567

强激光与粒子束, 2012, 24 (3): 567, 网络出版: 2012-05-08

多层铁电陶瓷击穿分析及优化

Electric field analyses and optimization of multilayer ferroelectric ceramics

论文大纲

王强 ^*王文斗谢龙蒋吉昊刘高旻

作者单位

中国工程物理研究院流体物理研究所，四川绵阳 621900

铁电陶瓷爆电换能介电击穿数值优化 ferroelectric ceramic explosive-electric transducer dielectric breakdown numerical optimization

摘要

建立了多层串联PZT95/5爆电换能组件3维数值模型，对固化封装条件下陶瓷介质击穿问题进行了计算分析，计算结果表明：在不改动器件外部结构尺寸条件下，采用等厚度PZT95/5叠片结构布局对进一步提高输出电压方面存在瓶颈。为克服上述影响以及降低爆电换能组件击穿概率，提出了PZT95/5铁电陶瓷非等厚度布局解决方案。为实现上述设想，通过引入不等式约束条件计算得到一组非等厚度优化布局，将爆电换能组件所用PZT95/5铁电陶瓷数量减至19片，同时有效实现该布局下，各片PZT95/5陶瓷电压均低于对应厚度击穿电压的优化目标。

Abstract

The lead zirconate titanate PbZr0.95Ti0.05O3(PZT95/5) ferroelectric ceramics are generally used in the explosive-electric transducer, as multilayer PZT95/5 thin films arrangement to realize high voltage output. However, the dielectric breakdown of the ceramics needs to be taken seriously. A quasi-static electric field model has been developed for voltage distribution analysis of multilayer PZT95/5 ceramics compressed by shock wave in the normal mode. The calculation results reveal that the electric potential difference of PZT95/5 films increases nonlinearly from ground electrode to output electrode. Since the thickness of ceramic materials has an effect upon dielectric strength, it is a suitable way to avoid device dielectric breakdown by designing carefully the nonuniform layout of PZT95/5 thin films. By using inequality restriction, an nonuniform layout optimization of PZT95/5 films arrangement is obtained, which reduces the layer number to 19 and makes the voltage of each layer of PZT95/5 element being lower than its breakdown voltage.

参考文献

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王强, 王文斗, 谢龙, 蒋吉昊, 刘高旻. 多层铁电陶瓷击穿分析及优化[J]. 强激光与粒子束, 2012, 24(3): 567. Wang Qiang, Wang Wendou, Xie Long, Jiang Jihao, Liu Gaomin. Electric field analyses and optimization of multilayer ferroelectric ceramics[J]. High Power Laser and Particle Beams, 2012, 24(3): 567.

多层铁电陶瓷击穿分析及优化

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