红外探测器用PLCT热释电陶瓷的研究

Research on Pb_(l-x-y) La_x Ca_y Ti_(l-x/4) O3 Pyroelectric Ceramics

通过改变材料组分制备了系列Pb_(1-x-y)La_xCa_yTi_(1-x/4)O_3(PLCT)热释电陶瓷,对其烧结工艺、介电性能和热释电性能等进行了研究。结果表明：最佳烧结温度1200℃,x=0．1、y=0．1这一组分的PLCT热释电陶瓷性能最优,室温热释电系数为6．0×10^(-8),探测率优值为4．32×10^(-5),符合红外探测器件的性能要求。

Through varying the component proportion of La/Ca,a series of Pb_(1-x-y)La_x Ca_y Ti_(1-x/4) O3 pyroelectric ceramic material is prepared.Results show the best sin- tering temperature is 1200℃.PLCT ceramics with x=0. 1,y=0.1 have good pyroelectric characteristics.The py- roelectric coefficient is 6.0×10^(-8)C/(cm^2 K)and the fig- ure of merits(Fd) is 4.32×10^(-5) Pa^(-0.5).The materials reach the required properties of infrared detector.