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Na_0.5Bi_0.5TiO₃基无铅压电织构陶瓷的制备

The Preparation of Na_0.5Bi_0.5TiO₃-based Textured Ceramics

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【Author】 YAO Yong-hong1,2,GAO Feng2,Tian Chang-sheng2(1.Department of Material Engineering,Shaanxi Poly Technical Institute,Xianyang,Shaanxi 712000;2.Department of Material Science and Engineering,Northwestern Polytechnical University,Xi’an,Shaanxi 710072,China)

【机构】陕西工业职业技术学院材料工程系；西北工业大学材料学院；

【摘要】选择0.92Na0.5Bi0.5TiO3-0.08BaTiO3作为研究对象,以具有各向异性的一维针状和二维片状的籽晶作为模板,采用(反应)模板生长法法制备无铅压电织构陶瓷。结果表明:以片状Bi2.5Na3.5Nb5O18为籽晶模板制备了0.92Na0.5Bi0.5TiO3-0.08 BaTiO3织构陶瓷,而以针状KSr2Nb5O15为籽晶模板未制备出织构陶瓷,其主要原因是针状KSr2Nb5O15定向分布困难,其表面存在晶体缺陷而导致晶粒异常生长而未获得织构陶瓷。更多还原

【Abstract】 Taking 0.92Na0.5Bi0.5TiO3-0.08BaTiO3 as the object of studying,a lead-free textured piezoelectric ceramics was fabricated by(Reactive) Templated Grain Growth method with the needle-like and plate-like parti-cles as templates.The results show that 0.92Na0.5Bi0.5TiO3-0.08BaTiO3 textured ceramics was achieved with the plate-like Bi2.5Na3.5Nb5O18 and wasn’t formed with the needle-like KSr2Nb5O15.The main reasons are that KSr2Nb5O15 can’t be arranged directionally and the crystal defects on the surface result in abnormal growth of the grains.更多还原