Temperature coefficient of piezoelectric constants in Pb(Mg1/3 Nb2/3)O3 - PbTiO3 ceramics

Materials Research

Manuel Henrique Lente¹  Alberto Luís Zanin¹  Jovan Vasiljevic¹  Ivair Aparecido Dos Santos¹  Jose Antonio Eiras¹  Ducinei Garcia¹ 

[1] ,Universidade Federal de São Carlos Departamento de Física Grupo de Cerâmicas FerroelétricasSão Carlos SP ,Brazil

关键词: temperature coefficient;    PMN-PT;    hot pressing;    coupling factor;   

DOI  :  10.1590/S1516-14392004000200026

来源: SciELO

【 摘 要 】

In this work, the thermal stability of piezoelectric constants of PMN-PT ceramics in the tetragonal and rhombohedral phases were investigated in a wide range of temperatures. The results showed that the tetragonal PMN-PT presented higher thermal stability and, consequently, the temperature coefficients for the piezoelectric constants were approximately zero. This result revealed to be much better than that commonly found for PZT ceramics. Although the rhombohedral PMN-PT presented a slight lower thermal stability, the values found for the coupling factor were significantly higher than the tetragonal composition.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License