The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1995
Filed:
Jun. 17, 1993
Masato Murakami, Koto, JP;
Naomichi Sakai, Koto, JP;
Hiroshi Takaichi, Koto, JP;
Akihiro Kondoh, Kobe, JP;
Shoichi Kagiya, Koto, JP;
Naomichi Nakamura, Koto, JP;
Hiroyuki Fujimoto, Kokubunji, JP;
Naoki Koshizuka, Koto, JP;
Shoji Tanaka, Koto, JP;
Nippon Steel Corporation, Tokyo, JP;
Tosoh Corporation, Yamaguchi, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Hyogo, JP;
Hokuriku Electric Power Company, Toyama, JP;
Kawasaki Steel Corporation, Hyogo, JP;
Railway Technical Research Institute, Tokyo, JP;
International Superconductivity Technology Center, Tokyo, JP;
Abstract
To ensure a well-oriented crystal structure, there is provided a process of producing an oxide superconductor of a Y--Ba--Cu--O system with a composition having an atomic ratio Y:Ba:Cu of 1.0-2.0:2.0-2.5:3.0-3.5, the process comprising the steps of: preparing a semimelt including solid and liquid phases and consisting of Y, Ba, Cu and O in the atomic ratio; and solidifying the semimelt to form the oxide superconductor by so controlling a moving speed of a solidification front to have two components of different values in two perpendicularly intersecting directions.