REACTIVITY OF BASNO3 AS ADDITIVE AGENT WITH THE 211-YTTRIUM AND 123-YTTRIUM BARIUM CUPRATES

被引：8
作者：
DELAMARE, MP
HERVIEU, M
DESGARDIN, G
RAVEAU, B
机构：
[1] Centre des Materiaux Supraconducteurs, ISMRA, 14050 Caen Cedex, 6, Bd. Maréchal Juin
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1994年 / 27卷 / 01期
关键词：
YBCO; SUPERCONDUCTORS; MELT TEXTURE GROWTH; PHI PHASE;
D O I：
10.1016/0921-5107(94)90150-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The reactions between BaSnO3 and YBa2Cu3O7 on the one hand and between BaSnO3 and Y2BaCuO5 (Y2BaCuO5 green phase and crude materials) on the other have been investigated in order to understand the role played by BaSnO3 during sintering in the YBCO system. The formation of an intermediate phase, Ba2Sn[Sn1/3-xCuxY2/3]O-6-delta with the (NH4)(3)FeF6 structure has been evidenced. In the presence of this new phase the liquid phase appears at lower-temperature YBCO. This results in a dramatic modification of the microstructure of the ceramic and of the distribution and the size of the Y2BaCuO5 inclusions with respect to the undoped YBCO. Thus the reactivity between YBa2Cu3O7 and BaSnO3 explains the role played by BaSnO3 in the MTG process of YBCO.
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页码：29 / 38
页数：10
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