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首页> 外文期刊>Materials Chemistry and Physics >Effect of SnO_2 concentration on the dielectric properties of BaTiO_3-(Sr_(1-1.5x)Bi_x)TiO_3 ceramics
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Effect of SnO_2 concentration on the dielectric properties of BaTiO_3-(Sr_(1-1.5x)Bi_x)TiO_3 ceramics

机译：SnO_2浓度对BaTiO_3-（Sr_（1-1.5x）Bi_x）TiO_3陶瓷介电性能的影响

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摘要

SnO_2-doped 0.45BaTiO_3-0.55(Sr_(1-1.5x)Bi_x)TiO_3 (BT-SBT) ceramics were prepared by the conventional solid state reaction method. The effect of SnC>2 concentration on the microstructures and dielectric properties has been investigated. XRD results indicate all the specimens have a perovskite structure without any secondary phases. With increasing SnO_2 concentration, the maximum dielectric constant decreases with slight shift in Curie temperature and the peak in temperature spectra becomes much broader. When the SnO_2 concentration is 1 mol%, the specimen exhibits a more homogeneous micro-structure and an improvement of the dielectric breakdown strength compared with the undoped one. Impedance analysis was carried out to investigate the trend in activation energy with the increase of SnO_2 concentration. The correlation between the dielectric breakdown strength and the difference of the activation energies of grain and grain boundary was qualitatively discussed. The accumulation of space charge was found to enhance the dielectric breakdown strength.
机译：采用常规固相反应法制备了SnO_2掺杂的0.45BaTiO_3-0.55（Sr_（1-1.5x）Bi_x）TiO_3（BT-SBT）陶瓷。研究了SnC> 2浓度对微结构和介电性能的影响。 XRD结果表明，所有样品均具有钙钛矿结构，没有任何第二相。随着SnO_2浓度的增加，最大介电常数随着居里温度的轻微变化而降低，并且温度谱的峰变得更宽。当SnO_2的浓度为1 mol％时，与未掺杂的样品相比，样品具有更均匀的微观结构和介电击穿强度的提高。进行了阻抗分析，研究了随着SnO_2浓度的增加活化能的变化趋势。定性地讨论了介电击穿强度与晶界和晶界活化能差之间的关系。发现空间电荷的积累增强了介电击穿强度。

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  • 来源
    《Materials Chemistry and Physics》 |2013年第3期|737-742|共6页
  • 作者

    Qian Zhang; Yong Zhang; Xiangrong Wang; Tao Ma; Zongbao Yuan;

  • 作者单位

    State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

    State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ceramics; Dielectric properties; Microstructure; Electronic characterisation;

    机译：陶瓷;介电性能微观结构电子表征;

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