Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – With melting
Patent
1996-10-07
1998-12-22
Kunemund, Robert
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
With melting
505451, 505729, 117 13, 117947, C30B 1502
Patent
active
058519564
ABSTRACT:
A large oxide crystal of high quality is manufactured by increasing the speed of crystal growth without affecting crystal growth. A melt of BaO--CuO as a raw material put in a crucible is heated and melt in the presence of a solid phase precipitate of Y.sub.2 BaCuO.sub.5 and kept at a prescribed temperature. Thereafter, a seed crystal is pulled up while being rotated, with the seed crystal being in contact with the surface of the melt, whereby an oxide crystal having the structure of YBa.sub.2 Cu.sub.3 O.sub.7-x this method, an atmosphere for growing the oxide crystal has an oxygen partial pressure higher than that in an ambient atmosphere.
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Egami Masahiro
Namikawa Yasuo
Shiohara Yuh
Yao Xin
International Superconductivity Technology Center
Ishikawajima-Harima Heavy Industries Co. Ltd.
Kunemund Robert
Sumitomo Electric Industries Ltd.
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