期刊
MATERIALS RESEARCH BULLETIN
卷 47, 期 12, 页码 4376-4382出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2012.09.033
关键词
Superconductors; Epitaxial growth; Sol-gel chemistry; Superconductivity
资金
- Zenergy Power GmbH
- Research Foundation - Flanders (FWO-Vlaanderen) [1.5.131.06N]
In this paper, an intensive study is performed to elucidate the link between sinter temperature and sinter atmosphere as processing parameters in YBCO film formation, starting from an aqueous fluorine-free AWAT CSD precursor. Moreover, the results are linked to the reaction mechanism behind this non-fluorine approach. This resulted in a partial oxygen versus temperature diagram containing different zones giving rise to specific YBCO properties. It is observed that sinter temperature and sinter atmosphere should be judiciously chosen to obtain high quality superconducting films. Under a 200 ppm O-2 atmosphere, highly textured YBCO films are obtained when sintering took place at 815 degrees C giving rise to an inductive T-c,T-onset of 92 K and a J(c)-value up to 1.1 MA cm(-2). Moreover, this paper gives a clear indication that the formation of a liquid phase strongly enhances the epitaxial growth. (C) 2012 Elsevier Ltd. All rights reserved.
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