(Pb_(1-x)Sr_x)TiO_3系红外敏感铁电陶瓷的研究  

Research on (Pb_(1-x)Sr_x)TiO_3 Infrared Sensitive Ferroelectric Ceramics

作　　者：王茂祥[1] 孙彤[1] 孙平[1] 

机构地区：[1]东南大学电子工程系,江苏南京210096

出　　处：《应用科学学报》2000年第4期365-367,共3页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目!(69671008)

摘　　要：通过改变材料组分并掺杂一定浓度的ＭｎＯ２，制备了系列（Ｐｂ１－ｘＳｒｘ）ＴｉＯ３（ＰＳＴ）红外敏感铁电陶瓷材料．对其电热性能如介电系数的温谱特性、频谱特性和热释电性能等进行了研究．结果表明，材料的居里温度随组分化学计量比的变化大致成线性关系，每增加 ｍｏｌ比１％的 Ｐｂ，将使居里温度提高约 ５℃．而随着测试频率的增加，居里温度与温度系数基本不变，但介电常数却略有下降．通过对ＰＳＴ系样品热释电性能的测量，可知材料的热释电系数约在 １０－３Ｃ／（ｍ２· Ｋ）量级．Through varying the component proportion of the Pb/Sr and doping 0. 25wt% MnO2, a series of (Pb1-xSrx)TiO3 infrared sensitive ferroelectric ceramic material was prepared. In this paper, the temperature, frequency, pyroelectric properties of these materials were studied. Results showed that the Curie temperature To would shift lineally with the Pb/Sr ratio. And the increase of 1% mol ratio Pb would raise Curie temperature by about5℃. With the increase of working frequency, the dielectric constantεof these materials showed a decrease, but the Curie temperature To and the temperature coefficient remained basically the same. The spontaneous polarization intensity of these materials decreased with the rise of the ambient temperature. The pyroelectric coefficient was in the order of 10-3C/(m2.K).

关 键 词：(Ph1-xSrx)TiO3系陶瓷 温谱特性 频谱特性 热释电性能 红外敏感 

分 类 号：TM286[一般工业技术—材料科学与工程] TN21[电气工程—电工理论与新技术]