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各向异性压电陶瓷材料
引用本文:余承杰,杨映东.各向异性压电陶瓷材料[J].压电与声光,1991,13(2):29-34.
作者姓名:余承杰  杨映东
作者单位:四川压电与声光技术研究所 (余承杰,杨映东),四川压电与声光技术研究所(何大珍)
摘    要:本工作制备了添有少量Pb(Zn_(1/3) Nb_(2/3))O_3,Bi(Zn_(1/2) Ti_(1/2))O_3和MnO_2的高电阻率,高密度的改性(PbCa)TiO_3压电陶瓷。这种陶瓷在150℃和施加40—50kV/cm电场条件下极化之后显示出大的各向异性压电特性。它具有高的厚度扩张模式机电藕合系数Kt,高的机械品质因素Qm低的介电常数,而平面耦合系数Kp值极小。于是,这种新的压电材料适于制作高频陶瓷滤波器超声换能器,金属探伤检测器,以及声表面波器件等。

关 键 词:改性PbTiO_3陶瓷  各向异性压电效应  晶体有序材料特性

Anisotropic Piezoelectric Ceramic Material
Yu Chengjie,Yang Y''ingdong,He Dazhen.Anisotropic Piezoelectric Ceramic Material[J].Piezoelectrics & Acoustooptics,1991,13(2):29-34.
Authors:Yu Chengjie  Yang Y'ingdong  He Dazhen
Affiliation:Sichuan Institute of Piezoelectric and Acoustooptic Technology
Abstract:The modified (Pb,Ca)TiO3 piezoelectric ceramics added with a small amount of Pb (Zn1/3Nb2/3) 0;, Bi(Zn1/2T1/2)O3 and MnO2 were prepared, which has high electrical resistivity and density .After polarized under the electric field of about 40-50 kV/cm at 150C, these ceramics exhibits large anisotropic piezoelectric constants. The modified ceramics have high electromechanical thickness coupling factor kt, high mechanical .quality factor as well as low dielectric constant, while planar coupling factor ftp decreases to a negligibly small value. This new piezoelectric material suitable for high frequency ceramic filters, ultrasonic transducers, metal flaw detectors and SAW de-
Keywords:modified PbTiO3 ceramics  anisotropic piezoelectric effect    crystal ordered material characteristics  
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