(K0.45+xNa0.55-x)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3-0.05BaZrO3无铅压电陶瓷的工艺对性能的影响

硅酸盐通报 , 2013, 32(5): 808-813.

(K0.45+xNa0.55-x)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3-0.05BaZrO3无铅压电陶瓷的工艺对性能的影响

李月明 ^1, , 肖祖贵 ^2, , 沈宗洋 ^3, , 洪燕 ^4, , 王竹梅 ^5, , 谢志翔 ^6,

1.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

2.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

3.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

4.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

5.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

6.景德镇陶瓷学院材料科学与工程学院;江西省先进陶瓷材料重点实验室,景德镇333403

基金项目: 江西省主要学科学术和技术带头人培养计划(2010DD01100) 江西省自然科学基金(20114BAB206023) 江西省教育厅科技项目(GJJ12508) 国家自然科学基金(51262011,50962007,51102121) 景德镇市学科带头人项目

关键词：无铅压电陶瓷 , 铌酸钾钠 , 极化工艺 , 老化性能

Effect of Process on the Properties of (K0.45+xNa0.55-x)0.98Li0.02(Nb0.77 Ta0.18 Sb0.05)O3-0.05BaZrO3 Lead-free Piezoceramic

采用传统固相反应烧结法,以(K0.45+xNa0.55-x)0.98Li0.02(Nb0.77 Ta0.18 Sb0.05)O3-0.005BaZrO3无铅压电陶瓷为研究对象,研究K/Na比例、粉体合成温度、烧结温度、极化工艺条件对压电陶瓷性能的影响,以及退火温度和老化时间对材料性能稳定性的影响.结果表明:该体系陶瓷粉体的合成温度为850℃.烧结温度为1130℃,x=0.04时陶瓷的压电常数d33可达372 pC/N,机电耦合系数kp达0.465.合理的极化条件为极化电压4 kV/mm,极化时间25min,极化温度120℃.压电陶瓷在125℃下具有较好的温度稳定性,但时间稳定性较差,放置300 d后压电常数才能稳定.

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