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High stability of dielectric permittity for K0.5Na 0.5NbO3-based lead free piezoelectric ceramics

  • Jingbo Zhao
  • , Shaobo Qu
  • , Hongliang Du
  • , Weidong Mo
  • , Zhuo Xu
  • , Song Xia
  • , Yiming Yang
  • , Zhen Yang
  • Air Force Engineering University Xian
  • Xi'an Jiaotong University
  • Northwestern Polytechnical University Xian

科研成果: 期刊稿件会议文章同行评审

1 引用 (Scopus)

摘要

A new perovskite ferroelectric, Bi(Mg2/3Nb1/3)O 3, was proposed to develop Na0.5K0.5NbO 3(KNN)-based lead-free piezoelectric ceramics by an conventional preparation technique. Dielectric stability properties of lead-free K 0.5Na0.5NbO3-Bi(Mg2/3Nb 1/3)O3 ceramics were studied. The addition of BMN leads to a polymorphic phase transition between ferroelectric orthorhombic and rhombohedral phases (x = 0.01). 0.03BMN-0.97KNN ceramics show a broad and stable permittivity maximum near 1450 from 25 to 400°C and lower dielectric loss(≤5%) at broad temperature usage range 25-400°C for diffusion phase transition. The results indicate that this material may have great potential for high temperature capacitors in automobile applications.

源语言英语
页(从-至)226-232
页数7
期刊Ferroelectrics
404
1
DOI
出版状态已出版 - 2010
活动12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18 - Xi'an, 中国
期限: 23 8月 200927 8月 2009

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