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BZT–xBCT陶瓷溶胶–凝胶方法合成、烧结及电学性能
作者:  张联盟   李诵斌 王传彬 
单位:武汉理工大学 材料复合新技术国家重点实验室 武汉 430070 
关键词:溶胶–凝胶 结构 电学性能 
分类号:TB332
出版年,卷(期):页码:2017,45(9):0-0
DOI:
摘要:

 采用溶胶–凝胶方法制备不同组分的(1–x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3(BZT–xBCT,0.3≤x≤0.7)纳米粉体并进行常压烧结,研究了BZT–xBCT粉体、陶瓷的结构及其电学性能。结果表明:溶胶–凝胶方法合成的BZT–xBCT粉体具有单一钙钛矿结构,晶粒细小均匀(约为50 nm)。与常规固相反应法相比,溶胶–凝胶方法提高了BZT–xBCT粉体的烧结活性,烧结后的陶瓷致密度高(密度>5.46 g/cm3),且具有优异的电学性能(BZT–0.5BCT陶瓷的压电系数d33=465 pC/N、最大介电常数εmax=8 450、剩余极化强度2Pr=23.40 μC/cm2)。不同组分的BZT–xBCT陶瓷均表现出介电弛豫现象,随着BCT组分的增加,其Curie温度逐渐升高。

 
基金项目:
国家自然科学基金(51272195,51521001);湖北省国际科技合作项目(2016AHB008);武汉理工大学自主创新研究基金(2017–JL–005)资助。
作者简介:
吉 祥(1990—),男,博士研究生。
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