KNN LTN基无铅压电织构陶瓷的相结构与性能
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航空科学基金资助项目(2009ZF53061);西北工业大学基础研究基金资助项目(GY04XD901)

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Phase Structure and Properties of Textured KNN LTN Lead free Piezoelectric Ceramics
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    摘要:

    以片状NaNbO3为籽晶模板,采用反应模板晶粒生长法制备了K0.48Na0.52NbO3 LiTa0.5Nb0.5O3(KNN LTN)基无铅压电织构陶瓷,研究了保温时间对陶瓷显微组织结构、织构度和电性能的影响规律,结果表明,织构陶瓷由钙钛矿相和钨青铜结构的K3Li2Nb5O15相组成,随着保温时间的增加,陶瓷的织构度逐渐增大,保温10 h时织构度最大(0.725);织构陶瓷的介电常数随着保温时间的增加而增大,介电损耗则随之增加而减小。与传统的自由取向的KNN LTN基陶瓷相比,织构陶瓷的压电常数d33提高,并随着保温时间的增加而增大。

    Abstract:

    The textured K0.48Na0.52NbO3 LiTa0.5Nb0.5O3(KNN LTN)lead free ceramics were fabricated by the reactive templated grain growth(RTGG) technique with the plate like NaNbO3 particles as template. The effects of soaking time on the phase structure,the texture fraction and the electrical properties were investigated.The results show that the textured ceramics contain perovskite KNN LTN and tungsten bronze type K3Li2Nb5O15 phases.The texture fraction increased with the increasing soaking time and it reached the maximum value of 0.725 at soaking time of 10 h.The dielectric constant increased and the dielectric loss decreased with the increasing soaking time.Compared with the conventional ceramics,the piezoelectric constant d33 of textured ceramics enhanced and increased with the increasing soaking time.

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高峰,刘亮亮,邓贞奇,李博,许贝,田长生. KNN LTN基无铅压电织构陶瓷的相结构与性能[J].压电与声光,2013,35(5):711-715. GAO Feng, LIU Liangliang, DENG Zhenqi, LI Bo, XU Bei, TIAN Changsheng. Phase Structure and Properties of Textured KNN LTN Lead free Piezoelectric Ceramics[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2013-09-23
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