高温高频用改性PbTiO_3压电陶瓷材料的研究  

Investigation on Modified PbTiO_3 Piezoelectric Ceramic Materials for High Temperature and High Frequency Applications

作　　者：晏伯武[1] 林汝湛[1] 张海波[1] 姜胜林[1] 周东祥[1] 

机构地区：[1]华中科技大学电子科学与技术系

出　　处：《压电与声光》2005年第4期418-420,共3页Piezoelectrics & Acoustooptics

基　　金：国家"八六三"资助项目(2002AA325080);国家自然科学基金重大研究计划(90201028)

摘　　要：基于改性PbTiO3陶瓷制备高温高频压电陶瓷材料,对ABO3型钙钛矿结构B位复合取代的(1-x)PbT iO3+x Pb(Cd4/9N b2/9W3/9)O3系压电陶瓷材料进行了研究。实验结果指出,当x=0.2时,掺入适量的改性添加物M nO2,经适当的工艺过程,可得压电性能优良的高温高频压电陶瓷材料。其中,材料的居里温度TC≥480°C,机械品质因数Qm>2 000,机电耦合系数kt可达0.45,介电常数ε约为200,是一种很有前途的高温高频压电陶瓷材料。For getting piezoelectric ceramic materials for high temperature and high frequency applications, some methods based on the modification of PbTiO3 piezoelectric ceramic materials hove been introduced. A solid solution system （1-x）PbTiO3＋xPb（Cd4/9Nb2/9W3/9）O3 has been investigated for its piezoelectric properties as the B-position complex substitution of ABOs perovskite structure. The experiment results show that the ceramic materials with the excellent piezoelectric properties for high temperature and high frequency applications can be obtained by adding proper amount of additives MnO2, and adopting appropriate technology process when x is 0. 2. The high Tc（≥480℃）, high Qm（〉2000）, large kt（=0. 45） and low ε （about 200） at room temperature make it possible to be used in high temperature and high freouencv fields.

关 键 词：高温高频应用 改性PbTiO3陶瓷 压电陶瓷材料 

分 类 号：TM223[一般工业技术—材料科学与工程]