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Title:
OXIDE SUPERCONDUCTOR CRYSTALS AND THEIR PRODUCTION
Document Type and Number:
Japanese Patent JPS649856
Kind Code:
A
Abstract:

PURPOSE: To obtain a superconductive crystal of high critical temperature by mixing an oxide powder of rare earth element-alkaline earth metal-copper with a copper compound and heating them at a prescribed temperature in an oxygen-containing atmosphere as they are allowed to come into contact with a rare earth element oxide.

CONSTITUTION: An oxide powder which is composed of a rare earth element such as Y, an alkaline earth metal such as Ba, Cu and oxygen, is mixed with a copper compound such as cupric oxide powder or copper naphthenate powder at a weight ratio of 100:(25W400) (calculated the Cu compound as CuO). Then, the mixture is heated in an oxygen-containing gas atmosphere at 950W1,400°C, as the mixture is brought into contact with oxides mainly consisting of rare earth elements such as Y2O3 to give a superconductive crystal of oxide. The resultant oxide superconductive crystal has high critical temperature without reduction in the critical point even in a strong magnetic field.


Inventors:
TAKEI FUMIHIKO
TAKEYA HIROYUKI
Application Number:
JP1987000165226
Publication Date:
January 13, 1989
Filing Date:
July 03, 1987
Export Citation:
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Assignee:
TAKEI FUMIHIKO
IBIDEN CO LTD
International Classes:
C04B35/00; C01G1/00; C01G3/00; C04B35/45; C30B9/00; C30B11/00; H01B12/00; H01L39/12; (IPC1-7): C04B35/00; H01B12/00; H01L39/12
Other References:
JAPANESE JOURNAL OF APPLIED PHYSICS