静电场中多孔PZT95/5铁电陶瓷的通道电-机械击穿模型及分析

蒋一萱 王省哲 贺红亮

蒋一萱, 王省哲, 贺红亮. 静电场中多孔PZT95/5铁电陶瓷的通道电-机械击穿模型及分析[J]. 高压物理学报, 2014, 28(6): 680-685. doi: 10.11858/gywlxb.2014.06.006
引用本文: 蒋一萱, 王省哲, 贺红亮. 静电场中多孔PZT95/5铁电陶瓷的通道电-机械击穿模型及分析[J]. 高压物理学报, 2014, 28(6): 680-685. doi: 10.11858/gywlxb.2014.06.006
JIANG Yi-Xuan, WANG Xing-Zhe, HE Hong-Liang. Channel Induced Electro-Mechanical Breakdown Model for Porous PZT95/5 Ceramics in Quasi-Static Electric Fields[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 680-685. doi: 10.11858/gywlxb.2014.06.006
Citation: JIANG Yi-Xuan, WANG Xing-Zhe, HE Hong-Liang. Channel Induced Electro-Mechanical Breakdown Model for Porous PZT95/5 Ceramics in Quasi-Static Electric Fields[J]. Chinese Journal of High Pressure Physics, 2014, 28(6): 680-685. doi: 10.11858/gywlxb.2014.06.006

静电场中多孔PZT95/5铁电陶瓷的通道电-机械击穿模型及分析

doi: 10.11858/gywlxb.2014.06.006
基金项目: 中国工程物理研究院科学技术发展基金(2010A0201005);中央高校基本科研业务费专项资金(lzujbky-2010-17)
详细信息
    作者简介:

    蒋一萱(1980—), 女,硕士,讲师,主要从事冲击波加载下铁电陶瓷力学特性研究.E-mail:jyix@lzu.edu.cn

    通讯作者:

    王省哲(1972—), 男,博士,教授,主要从事电磁固体力学研究.E-mail:xzwang@lzu.edu.cn

  • 中图分类号: O521.23

Channel Induced Electro-Mechanical Breakdown Model for Porous PZT95/5 Ceramics in Quasi-Static Electric Fields

  • 摘要: 作为爆电电源的多孔PZT95/5铁电陶瓷具有极为重要的工程应用背景,但它在强电场作用下易发生电击穿失效,从而影响其放电效率,甚至造成电源失效。基于多孔PZT95/5铁电陶瓷材料在外电场作用下内部形成导电通道以致电失效的机制,通过通道内部局部放电及通道电-机械击穿机理,建立了导电通道诱导的多孔铁电陶瓷的电击穿模型并进行了相关的理论分析。基于本模型, 给出了不同孔隙率下铁电陶瓷的电击穿临界电场强度,预测结果与实验测试结果吻合良好, 且材料孔隙率越大,内部电击穿通道的特征尺寸越大,导致铁电陶瓷材料的电击穿临界场强显著降低。

     

  • 图  PZT95/5陶瓷电击穿场强随孔隙率的变化曲线

    Figure  1.  Dielectric breakdown strength of PZT95/5 ceramics as a function of porosity

    图  PZT95/5陶瓷电击穿场强随通道特征尺寸的变化曲线

    Figure  2.  Dielectric breakdown strength of PZT95/5 ceramics as a function of path feature size

    表  1  不同孔隙率及不同造孔剂的PZT95/5铁电陶瓷材料的击穿临界电场强度

    Table  1.   Dielectric breakdown strength of PZT95/5 ceramics with different porosities and pore formers

    Material[17] Porosity/
    (%)
    Relative dielectric
    constant
    Young's
    modulus/(GPa)
    Path
    size/(μm)
    Predicted breakdown
    strength/(kV/m)
    Experimental breakdown
    strength/(kV/m)
    Dense material
    by hot-press
    method
    0.4 314 148 1.00 16 500 15 000
    Dense 4.1 309 148 5.00 7 460 6 800
    PMMA
    (Spherical shape)
    7.2 281 136 6.00 7 140 -
    11.2 252 121 7.00 6 980 -
    13.5 241 112 8.00 6 680 6 600
    Dextrin
    (Irregular pores)
    8.9 249 121 7.50 6 790 6 650
    10.7 236 112 8.00 6 750 6 550
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  • 收稿日期:  2012-06-25
  • 修回日期:  2012-09-09

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