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Chinese Journal of High Pressure Physics  > 2014  >  28(6): 680-685.
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
shu

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

doi: 10.11858/gywlxb.2014.06.006
  • 1.

    Key Laboratory of Mechanics on Environment and Disaster in Western China, Ministry of Education of China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China

  • 2.

    National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China

  • Received Date: 25 Jun 2012
  • Rev Recd Date: 09 Sep 2012
    Abstract
  • As a promising candidate material in explosive power supplies, the porous PZT95/5 ferroelectric ceramics exhibit attractive advantages in engineering applications.However, the electrical breakdown of ferroelectric ceramics usually reduces their discharge efficiency, and even results in failure of the explosive power supply.In this paper, we presented a theoretical model of electro-mechanical breakdown for the porous PZT95/5 ferroelectric ceramics in quasi-static electric fields.The model is based on the mechanism of electro-mechanical breakdown and partial discharges in conducting channels generated inside the ceramics.Theoretical predictions of the critical electric-field breakdown strength of the ferroelectric ceramics with different porosities are carried out, and show good agreements with the experimental results.The characteristic size of the conducting channel increases with the porosity, which causes a significant reduce in the critical electric-field breakdown strength.

     

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