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脉冲电容器用细电滞回线铁电陶瓷材料的研究

陈学锋 李华梅 李东杰 曹 菲 董显林

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脉冲电容器用细电滞回线铁电陶瓷材料的研究

陈学锋, 李华梅, 李东杰, 曹 菲, 董显林

Study on slim-loop ferroelectric ceramics for high-power pulse capacitors

Chen Xue-Feng, Li Hua-Mei, Li Dong-Jie, Cao Fei, Dong Xian-Lin
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  • 采用低锆区的Pb(Zr0.42Sn0.40Ti0.18)O3(PZST42/40/18)铁电陶瓷为基, 通过少量La和Ba取代Pb同时Nb取代(Zr, Sn, Ti)复合取代的方法得到掺杂PZST42/40/18细电滞回线铁电陶瓷, 其最大极化强度Pmax≈20.66μC/cm2, 剩余极化强度Pr≈0.55μC/cm
    A slim-loop ferroelectric ceramic of Pb (Zr0.42Sn0.40Ti0.18)O3(PZST42/40/18) was prepared by partially replacing Pb with Ba and La, and replacing (Zr, Sn, Ti) with Nb in low zirconiumn. The saturation polarization (Ps), the remnant polarization (Pr) and the area of the hysteresis loop (S) were measured to be 20.66 μC/cm2, 0.55 μC/cm2 and 0.0298J/cm3, respectively. Relative permittivity (ε)≈2840 can be reached in this ferroelectric ceramic at room temperature and frequency of 1kHz, but the energy density (w) is 0.319J/cm3. The results of the pulse charge-discharge measurements showed that a single piece of the PZST42/40/18 slim-loop ferroelectric ceramic can carry 2330 A and endures charge-discharge cycle over one thousand times. The released charge decreases with increasing cycle times according to second order exponential decay. These ferroelectric ceramics have potential for pulsed power capacitor applications.
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出版历程
  • 收稿日期:  2007-09-03
  • 修回日期:  2008-04-03
  • 刊出日期:  2008-11-20

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