硅酸盐学报

(Ba1–xCax)(Ti0.94Zr0.056Sn0.004)O3无铅压电陶瓷电学性能和Curie温度的协同调控

作者：汪宁张波萍赵磊马剑郑乾方

单位：北京市新能源材料与技术重点实验室北京科技大学材料科学与工程学院北京 100083

关键词：钛酸钡无铅压电陶瓷相结构压电性能

分类号：TM282

出版年,卷(期):页码：2016,44(12):0-0

DOI：10.14062/j.issn.0454-5648.2016.12.02

摘要：

在A位和B位同时分别加入Ca2+、Zr4+和Sn4+，采用传统的固相烧结法在1 480 ℃烧结4 h制备了(Ba1–xCax)(Ti0.94Zr0.056Sn0.004)O3(BCxTZS)压电陶瓷。研究了Ca2+含量x对BCxTZS陶瓷微观形貌、相结构和电学性能的影响。结果表明：少量Ca2+有利于晶粒长大，x=0.05的样品具有最大的晶粒尺寸12.88 μm，Ca2+、Zr4+和Sn4+全部固溶到BaTiO3晶格中形成单一固溶体。当0.00≤x≤0.03时，BCxTZS陶瓷的室温相结构为正交相(O)–四方相(T)两相共存；x=0.05时，O–菱方相(R)–T三相共存；x=0.07时，O相消失，R–T两相共存。所有样品具有较高的Curie温度(TC＞104 ℃)和良好的电学性能(d33=325 pC/N、kp=34%、Qm=151)，实现了电学性能和Curie温度的协同调控。

(Ba,Ca)(Ti,Zr)O3 and (Ba,Ca)(Ti,Sn)O3 lead-free piezoelectric ceramics have attracted much attention due to their superior piezoelectric properties. In this paper, Ca2+, Zr4+ and Sn4+ were simultaneously doped at A-sites and B-sites, respectively. (Ba1–xCax)(Ti0.94Zr0.056Sn0.004)O3(BCxTZS) lead-free piezoelectric ceramics were fabricated by conventional solid-state sintering at 1 480 ℃ for 4 h. The effect of Ca2+ content (x) on the microstructure, phase structure and electrical properties were investigated. The results show that a small amount of Ca2+ is conducive to the grain growth, in which a greater grain size of 12.88 μm is attained as x=0.05. Ca2+, Sn4+ and Zr4+ ions completely diffuse into the BaTiO3 lattice to form a single solid solution. The phase structure is orthorhombic (O) –tetragonal (T) coexisted structure as 0.00≤x≤0.03, O–rhombohedral(R) –T multiphase coexisted structure as x=0.05, and R–T coexisted structure as x=0.07, respectively. All the samples possess a high Curie temperature (i.e., TC>104 ℃), along with the better piezoelectric properties (i.e., d33=325 pC/N, kp=34%, Qm=151) as x=0.05, improving the electrical properties and the Curie temperature.

基金项目：

国家自然科学基金(51472026)；高等学校博士学科点专项基金(20130006110006)。

作者简介：

汪宁(1992—)，女，硕士研究生。

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