Experimental and theoretical study of the ferroelectric and piezoelectric behavior of strontium-doped PZT

被引:42
作者
Nasar, RS
Cerqueira, M
Longo, E
Varela, JA
Beltran, A
机构
[1] UFRN, Dept Quim, BR-59072970 Natal, RN, Brazil
[2] UFSCar, Dept Quim, Lab Interdisciplinar Eletroqulmica & Ceram, BR-13565905 Sao Carlos, SP, Brazil
[3] UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
[4] Univ Jaume, Dept Ciencies Expt, Castello, Spain
关键词
calculations-aiPI; ferroelectrics; piezoelectrics; PZT;
D O I
10.1016/S0955-2219(01)00256-4
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Theoretical data using ab initio perturbed ion calculation were compared with ferroelectric and piezoelectric experimental data of strontium doped PZT. Various concentrations of SrO in PZT at constant temperature and sintering time were carried out. Experimental results, such as the remanent polarization, P-R of 6.9-8.9 muC/Cm-2, the coercive field, E-C of 6.6-7.8 kVcm, and the planar coupling factor, Kp of 0.45-0.53, were compared with the energy of Zr4+ and Ti4+ ion dislocation and the lattice interaction energy which show that strontium increment in PZT alter the energies and increase the values of piezoelectric and ferroelectric variables. Calculations of lattice energy of the rhombohedral phase show that a phase non-stability is coincident with increasing experimental values of the P-R, E-C and Kp. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:209 / 218
页数:10
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