LOW-TEMPERATURE PHASE-EQUILIBRIA IN THE Y-BA-CU-O SYSTEM

被引：25

作者：

BROSHA, EL ^{[1
]}

GARZON, FH ^{[1
]}

RAISTRICK, ID ^{[1
]}

机构：

[1] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1995年 / 78卷 / 07期

关键词：

D O I：

10.1111/j.1151-2916.1995.tb08884.x

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：

Ultrasonically prepared freeze-dried nitrate precursors and high-precision solution calorimetry were used to investigate the low-temperature thermodynamic stabilities of compounds in the Y-Cu-O, Ba-Cu-O, Y-Ba-O, and Y-Ba-Cu-O pseudobinary and pseudoternary systems at 1 atm of oxygen, Y2Cu2O5, Y2BaCuO5, and BaCuO2 were found to be metastable below 682 degrees, 728 degrees, and 710 degrees +/- 5 degrees C, respectively, The only stable phases in the Y-Ba-Cu-O system at 298 K and 1 atm of oxygen are Ba2Cu3O6, CuO, BaO2, and Y2O3. By compiling the calorimetric and phase equilibria data, a series of Y-Ba-Cu-O isothermal phase diagrams were constructed between 25 degrees and 900 degrees C at 1 atm of oxygen.

引用

页码：1745 / 1752

页数：8

共 65 条

[1] NEW PHASES WITH PEROVSKITE-RELATED STRUCTURES IN THE MOST BASIC ZONE OF THE BAO-Y2O3-CUO-O SYSTEM [J].