Simultaneous measurement of thermophysical properties and dielectric properties of PZT-Based ferroelectric ceramics by thermal radiation calorimetry

被引：6

作者：

Morimoto, K

Uematsu, A

Sawai, S

Hisano, K

Yamamoto, T

机构：

[1] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan

[2] Natl Def Acad, Dept Commun Engn, Yokosuka, Kanagawa 2398686, Japan

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2003年 / 24卷 / 03期

关键词：

dielectric constant; phase transition; PZT; simultaneous measurement; specific heat capacity; thermal conductivity; thermal diffusivity; thermal radiation calorimetry;

D O I：

10.1023/A:1024052619526

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Simultaneous measurements of thermophysical properties and dielectric properties have been performed for PZT-based ferroelectric ceramics. An apparatus based on thermal radiation calorimetry was used in the present measurements. Anomalies in the thermophysical properties were observed near the ferroelectric-to-paraelectric phase transition temperature. The anomalous peak was at almost the same temperature as the inflection point of the dielectric constant. It was found that modification of PZT with increasing Nb, Mg, Zn, and Sr causes a decrease of the Curie temperature and an increase of the hysteresis phenomena for the phase transition, and the values of the thermal conductivity increase with temperature similar to amorphous materials.

引用

页码：821 / 835

页数：15

共 14 条

[1] SPECIFIC-HEAT OF HEXAGONAL BARIUM-TITANATE [J].