INFLUENCE OF IRON DOPING ON THE MICROSTRUCTURE OF YBA2(CU1-XFEX)3O7-DELTA CERAMICS

被引：3
|
作者：
DIKO, P [1 ]
DUVIGNEAUD, PH [1 ]
LANCKBEEN, A [1 ]
VANMOER, A [1 ]
NAESSENS, G [1 ]
DELTOUR, R [1 ]
机构：
[1] UNIV LIBRE BRUXELLES,SERV CHIM IND & ANALYT,B-1050 BRUSSELS,BELGIUM
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1993年 / 76卷 / 11期
关键词：
D O I：
10.1111/j.1151-2916.1993.tb04027.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：
Porosity, grain growth, phase composition, and microstructural defects were studied in sintered YBa2(Cu1-x)Fex)3O7-delta ceramics for x values up to 0.3. The porosity of the samples, related to the sintering mechanism, was independent of iron concentration. A linear dependence of the grain size with the inverse of the iron concentration was found, strongly suggesting grain boundary segregation of iron. The solubility limit was estimated to be x = 0.18 at 950-degrees-C in O2. Beyond this limit, a new microstructural component was found consisting of Yba2(Cu1-xFex)3O7-delta YBaCuFeO5 and Ba(Cu,Fe)O2. The transition from an orthorhombic twin to an orthorhombic tweed phase and a tetragonal phase was detected by polarized light microscopy.
引用
收藏
页码：2859 / 2864
页数：6
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