摘要
铌酸钾钠基陶瓷中,通过对钾钠比率的精确控制,找到了类似锆钛酸铅的准同型相界,同时为了能够提高压电性能的温度稳定性,引入钛酸锶和铌酸锂,制备出了具有优异压电温度稳定性的铌酸钾钠基陶瓷0.9K0.46Na0.54NO3- 0.06LiNbO3-0.04SrTiO3, 在宽阔的温度范围25-250°C,压电系数d33=138-142pC/N,压电系数变化率TPP%<5%;25-300°C,压电系数d33=114-142pC/N,压电系数变化率TPP%<20%;实验结果表明:这种陶瓷材料虽然压电系数不是很高,但是在宽阔的温度范围内具有优异的温度稳定性能,具有重要的工程应用价值。
In K0.5Na0.5NbO3 based ceramics, morphotropic phase boundary(MPB) can be found via adjusting the K: Na ratio. At the same time, SrTiO3 and LiNbO3 were introduced to improve the temperature stability of K0.5Na0.5NbO3 based ceramics. 0.9K0.46Na0.54-0.06LiNbO3-0.04SrTiO3 ceramics was prepared and the piezoelectric temperature stability can be remarkably improved. Piezoelectric coefficient d33=138-142pC/N in the range 25-250°C,and the piezoelectric coefficient stability TPP%0.46Na0.54NO3- 0.06LiNbO3-0.04SrTiO3 ceramics possesses good piezoelectric temperature stability and it is of importance in engineering application.
出处
《材料科学》
2011年第1期17-21,共5页
Material Sciences
基金
国家自然科学基金重点项目(10804130和60871027)
陕西省自然科学基金(批准号:2009JQ1001)资助课题
西安交通大学电绝缘和电气设备实验室(EIPEP10202)。
