| 多层铁电陶瓷击穿分析及优化 |
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| 引用本文： | 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):567-570. |
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| 作者姓名： | 王强 王文斗 谢龙 蒋吉昊 刘高旻 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900 |
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| 基金项目： | 中国工程物理研究院科学技术发展基金项目(2010B0402052) |
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| 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。
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| 关 键 词： | 铁电陶瓷 爆电换能 介电击穿 数值优化 |
| 收稿时间： | 2011/10/26 |
Electric field analyses and optimization of multilayer ferroelectric ceramics |
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| 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):567-570. |
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| Authors: | Wang Qiang Wang Wendou Xie Long Jiang Jihao Liu Gaomin |
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| Affiliation: | 1.Institute of Fluid Physics,CAEP,P.O.Box 919-105,Mianyang 621900,China |
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| 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. |
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| Keywords: | ferroelectric ceramic explosive-electric transducer dielectric breakdown numerical optimization |
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