Effects of heat treatment on the phase transitions in BaTiO3 fine particles

被引：16

作者：

Fukui, Y

Izumisawa, S

Atake, T

Hamano, A

Shirakami, T

Ikawa, H

机构：

[1] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 226, Japan

[2] Sumitomo Met Ind Ltd, Adv Technol Res Labs, Amagasaki, Hyogo 660, Japan

[3] Ryukoku Univ, Otsu, Shiga 52021, Japan

[4] Kanagawa Inst Technol, Atsugi, Kanagawa 24302, Japan

来源：

FERROELECTRICS | 1997年 / 203卷 / 1-4期

关键词：

BaTiO3; fine particles; phase transition; size effect; heat capacity;

D O I：

10.1080/00150199708012849

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of heat treatment were investigated on the phase transitions in BaTiO3 fine particles synthesized by hydrothermal method. The virgin fine particles and the samples treated below 400 degrees C showed no phase transition below room temperature, while the intrinsic successive phase transitions were detected for the samples treated above 600 degrees C by the low temperature heat capacity measurements. The enthalpy and entropy of the orthorhombic-tetragonal phase transition increased with increasing temperature of heat treatment and approached to the values of the bulk sample obtained by melt-frozen method.

引用

页码：227 / 239

页数：13

共 27 条

[1] HEAT-CAPACITY OF THE HIGH-TEMPERATURE SUPERCONDUCTOR BA2DYCU3O7 [J].