Elastic modulus and mechanical loss associated with phase transitions and domain walls motions in PZT based ceramics

被引：17

作者：

Bourim, EM ^{[1
]}

Idrissi, H ^{[1
]}

Cheng, BL ^{[1
]}

Gabbay, M ^{[1
]}

Fantozzi, G ^{[1
]}

机构：

[1] S CHINA UNIV TECHNOL,DEPT PHYS,GUANGZHOU 510641,PEOPLES R CHINA

来源：

JOURNAL DE PHYSIQUE IV | 1996年 / 6卷 / C8期

关键词：

D O I：

10.1051/jp4:19968136

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Elastic modulus (shear modulus G or Young's modulus E) and internal friction Q(-1) were measured as a function of temperature on undoped Pb(Zr50Ti50)O-3, Pb(Zr52Ti48)O-3, Pb(Zr54Ti46)O-3 ceramics from -180 degrees C to 500 degrees C. Experiments were performed at low and medium frequencies (0.1 Hz - 4 kHz). The E(T) curves show two anomalies which are due to following phase transitions: tetragonal to cubic (T-C) and rhombohedral to tetragonal (TR-T). The To temperatures are in good agreement with phase diagram from literature. The TR-T temperatures allow to complete the phase diagram of the morphotropic phase boundary of PZT in the low temperature range. Moreover, Q(-1)(T) curves recorded at low frequencies show two relaxation peaks; their activation energy and relaxation time are determined using the Arrhenius plots. These two relaxation peaks could be attributed to the interaction of domain walls with point defects.

引用

页码：633 / 636

页数：4