钙钛矿结构织构化无铅压电陶瓷的研究

发布时间：2018-01-22 02:28

本文关键词： 钙钛矿结构无铅压电陶瓷织构化技术展望　出处：《硅酸盐学报》2017年09期 　论文类型：期刊论文

【摘要】：综述了反应模板晶粒生长(RTGG)技术和模板晶粒生长(TGG)技术在钙钛矿结构织构陶瓷中的应用,探讨了利用TGG技术制备具有001取向织构陶瓷的生长机制,并对模板和基料的选择进行了说明:1)模板应选择与基料具有相同晶体结构且晶格失配小于15%的非等轴化学性能随温度变化稳定的片状单晶体;2)从动力学角度分析了TGG过程,基料颗粒越细小,模板形核和取向晶粒生长的驱动力越大。评述了3种具有钙钛矿结构无铅压电织构陶瓷体系(铌酸钾钠基、钛酸钡基、钛酸铋钾钠基)的织构化研究现状和织构陶瓷特点,特别是压电性能改善的途径,并展望了3类具有钙钛矿结构无铅压电陶瓷织构化的发展方向及前景。
[Abstract]:The application of reaction template grain growth (RTGG) technique and template grain growth technique (TGGG) in perovskite texture ceramics is reviewed. The growth mechanism of 001 oriented textured ceramics prepared by TGG technique was discussed. The selection of the template and the base material shows that the template should choose the non-equiaxed single crystal which has the same crystal structure and the lattice mismatch less than 15% with the change of temperature. 2) the TGG process is analyzed from the point of view of kinetics. The smaller the base particle is, the smaller the particle size is. The more driving force of template nucleation and oriented grain growth, the three kinds of lead-free piezoelectric texture ceramics with perovskite structure (potassium sodium niobate and barium titanate) are reviewed. The present situation of texturing of bismuth bismuth titanate potassium and sodium titanate and the characteristics of textured ceramics, especially the ways to improve piezoelectric properties are discussed. The development direction and prospect of texturing of three kinds of lead-free piezoelectric ceramics with perovskite structure are prospected.
【作者单位】：同济大学材料科学与工程学院;
【基金】：国家自然科学基金(51372171,51332003)资助
【分类号】：TM282
【正文快照】： 压电陶瓷是一种能够实现机械能和电能相互转换的信息功能材料,广泛应用于医疗、航天、通讯、军工等重要领域[1]。目前市场上广泛使用的是含铅压电陶瓷,铅在高温下极易挥发,因而含铅陶瓷在烧结和应用过程中会对环境和人体产生损害,研究环境协调性好、污染少的无铅压电陶瓷是一

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