Y2O3掺杂对(Bi0.5Na0.5)0.94Ba0.06TiO3无铅压电陶瓷性能的影响研究

硅酸盐通报 , 2010, 29(3): 602-607.

Y2O3掺杂对(Bi0.5Na0.5)0.94Ba0.06TiO3无铅压电陶瓷性能的影响研究

付鹏 ^1, , 张建忠 ^2, , 张新娟 ^3, , 刘雪华 ^4, , 孙立娟 ^5, , 周红婵 ^6, , 孙中源 ^7,

1.聊城大学材料学院,聊城,252059;聊城大学新能源与环境材料工程中心,聊城,252059

2.聊城大学材料学院,聊城,252059

3.聊城大学材料学院,聊城,252059

4.聊城大学材料学院,聊城,252059

5.聊城大学材料学院,聊城,252059

6.聊城大学材料学院,聊城,252059

7.聊城大学材料学院,聊城,252059

基金项目: 国家科学自然基金(50602021;50802038) 聊城大学大学生科技文化创新项目(SRT08004CL2)

关键词： Y2O3掺杂 , (Bi0.5Na0.5)0.94Ba0.06TiO3陶瓷 , 压电性能 , 铁电性能 , 介电性能

Effect of Y2O3 on the Properties of (Bi0.5Na0.5)0.94Ba0.06TiO3 Lead-free Piezoelectric Ceramics

采用传统固相反应法制备了Y2O3掺杂(Bi0.5Na0.5)0.94Ba0.06TiO3(简写为BNBT6)陶瓷[简称为BNBT6-x(wt%)Y2O3陶瓷].研究了Y2O3 (0.2wt%～0.8wt%)掺杂对BNBT6陶瓷的结构、介电、压电、铁电性能的影响.结果表明,所有Y2O3掺杂陶瓷样品均形成了单一的钙钛矿结构;陶瓷的介电、压电、铁电性能受Y2O3掺杂的影响较为显著:当掺杂0.4wt%Y2O3时,10 kHz频率下测得的室温εr达到1530,且tanδ较小,为0.050,d33达到152 pC/N,kp=0.27,Qm=134.掺杂0.2wt%的Y2O3时BNBT6陶瓷的d33为145 pC/N,kp增大到0.29,Qm达到173,tanδ为0.053;掺杂适量Y2O3的BNBT6陶瓷铁电性能也得到改善.

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