Sb3+掺杂Li0.02(Na0.53K0.48)0.98Nb0.8Ta0.2O3无铅压电陶瓷的电学性能

硅酸盐通报 , 2016, 35(3): 794-804.

Sb3+掺杂Li0.02(Na0.53K0.48)0.98Nb0.8Ta0.2O3无铅压电陶瓷的电学性能

李慧 ^1, , 孙彩霞 ^2, , 陈贺 ^3, , 王博 ^4, , 张洋洋 ^5,

1.黄河科技学院信息工程学院,郑州,450006

2.黄河科技学院信息工程学院,郑州,450006

3.黄河科技学院信息工程学院,郑州,450006

4.黄河科技学院信息工程学院,郑州,450006

5.黄河科技学院信息工程学院,郑州,450006

基金项目: 黄河科技学院自然科学研究项目(KYZR201306) 河南省教育厅科学技术重点项目(14B510005) 郑州市科技局项目(20140755,20140756,20130685,20130679,121PYFZX178)

关键词：无铅压电陶瓷 , 压电性能 , (KNa)NbO3 , Sb3+掺杂

Dielectric and Piezoelectric Properties of Sb-doped Li0.02(Na0.53K0.48)0.98Nb0.8Ta0.2O3 Lead-free Ceramics

Keywords： lead-free piezoelectric ceramics , piezoelectric propertities , (KNa) NbO3 , Sb3+ addition

用传统的固相反应烧结法制备了Li0.02(Na0.53K0.48)0.98 Nb0.8Ta0.2O3-xSb2O3(LNKNT-xSb2O3)无铅压电陶瓷,研究了Sb3+掺杂对陶瓷晶体结构、显微结构及压电性能的影响.研究结果表明,Sb3+掺杂LNKNT陶瓷属于明显的“软性”掺杂,少量掺杂Sb3+能显著提高陶瓷的烧结及压电性能.当烧结温度为1100℃,掺杂量为2wt％时,LNKNT-0.02Sb陶瓷达到最好的压电性能:d33=193 pC/N,KP=49.5％,εr=779,Pr=16μC/cm2,应变达到2.3％,但机械品质因数QM从110.97降低到了85,介电损耗tanδ从1.66％增加到了2.01％.

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