PbTiO_3-Pb(Cd_(1/3)Nb_(2/3))O_3系高温高频压电陶瓷材料的研制

Study on PbTiO3Pb(Cd1/3Nb2/3)O3 Piezoelectric Ceramic Materials for High Temperature and High Frequency Applications

对（１－ｘ）ＰｂＴｉＯ２＋ｘＰｂ（Ｃｄ１／３Ｎｂ２／３）Ｏ３系压电陶瓷材料进行了研究。实验结果指出，当ｘ＝０．１４时，掺入适量的改性添加物ＮｉＯ，ＭｎＯ２，ＷＯ３，经过适当的工艺过程，可得到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＞４００℃，机械品质因数Ｑｍ＞２０００，机电耦合系数Ｋｔ可达０．４５，介电常数ε小于２１０，是一种很有前途的高温高频压电陶瓷材料。

The piezoelectric properties of the solid solution system (1-x)PbTiO3+xPb(Cd1/3Nb2/3)O3 are studied. The ceramic materials with excellent piezoelectric properties for high temperature and high frequency applications can be obtained by adding proper amount of additives NiO, MnO2 or WO3 and adopting the appropriate technology process when x is 0.14. The high Tc(>400℃),high Qm(>2000), large Kt(>0.45) and low (about 210) at room temperature make it possible for them to be used in high temperature and high frequency fields.