Preparation, structure and peritectic transition of La1.5-x/2SrxBa1.5-x/2Cu3Oy superconductors

被引：1
|
作者：
Yuan, CC
Kao, HCI
Wang, CM
机构：
[1] Department of Chemistry, Tamkang University, Tamsui
来源：
MATERIALS RESEARCH BULLETIN | 1996年 / 31卷 / 11期
关键词：
oxides; superconductors; differential scanning calorimetry (DSC); thermogravimetric analysis (TGA); X-ray diffraction;
D O I：
10.1016/0025-5408(96)00130-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A series of single phase La1.5-x/2SrxBa1.5-x/2Cu3Oy (0 less than or equal to x less than or equal to 0.80) compounds with a tetragonal triple-perovskite unit-cell have been prepared by solid-state reaction. With increasing x, unit-cell alpha axis, volume, density, and peritectic transition temperature (T-p) of La1.5-x/2SrxBa1.5-x/2CU3Oy decrease monotonically. The peak position of T-p measured in the 25 mL/min flowing O-2 atmosphere and 10 degrees C/min heating rate decreases from 1105 to 1080 degrees C as x increases from 0 to 0.80. The oxygen atom loss in the peritectic transition is 0.38 +/- 0.05 O-atom . mole(-1).
引用
收藏
页码：1391 / 1397
页数：7
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