无机材料学报

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PMNT陶瓷材料的压电介电性能研究

孙大志; 赵梅瑜; 罗豪甦; 瞿翠凤; 金绮华; 姚春华; 林盛卫; 殷之文   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:1999-09-16 修回日期:1999-10-18 出版日期:2000-10-20 网络出版日期:2000-10-20

Piezoelectric and Dielectric Properties of PMNT Ceramic Materials

SUN Da-Zhi; ZHAO Met-Yu; LUO Hao-Su; QU Cui-Feng; JIN Qi-Hua; YAO Chun-Hua; LIN Sheng-Wei; YIN Zhi-Wen   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1999-09-16 Revised:1999-10-18 Published:2000-10-20 Online:2000-10-20

摘要: 本文研究了准同型相界处铌镁酸铅-钛酸铅(PMNT)陶瓷材料的介电压电性能,合适的组份和烧结,可使PMNT陶瓷材料具有较好的压电性能,33达540pC/N,达0.50以上.观察了不同烧结工艺下陶瓷材料的微观结构,烧结时间过长不仅使晶粒尺寸变大,亦可造成晶粒快速生长.对化学组成和微观结构与压电性能之间的关系进行了讨论.

关键词: PMNT, 压电, 介电, 微观形貌

Abstract: The dielectric and piezoelectric properties of lead magnate niobate-lead titanite(PMNT) ceramic material in the vicinity of the morphotropic phase boundary
were investigated. The properties in the material can be improved by selecting the proper composition and sintering processing. The value of
the piezoelectric coefficient d33 and the coupling factor kt is larger than 540 pC/N and 0.50, respectively. The microstructure
of the material sintered with different time was investigated. Longer sintering time not only makes grains larger, but also makes the
growing speed of grains faster. The correlation between chemical composition, microstructure and the piezoelectric property in PMNT ceramics was discussed.

Key words: PMNT, piezoelectricity, dielectricity, microscopic figure

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