Title:
PRODUCTION OF COARSE CRYSTAL OF RE SUPER-CONDUCTING OXIDE
Document Type and Number:
Japanese Patent JPH061697
Kind Code:
A
Abstract:
PURPOSE: To obtain a coarse crystal with a simple process by calcining a mixture of raw materials having a specified composition under specified conditions, crushing the calcined material to obtain a precursor, forming the precursor, rapidly heating and then slowly cooling the formed body.
CONSTITUTION: The mixture of raw materials having a specified composition is heated at 800-1000°C for 1 hr in the low-oxygen-partial-pressure atmosphere with the oxygen partial pressure controlled to ≤10-3Torr, and the calcined material is crushed to obtain a precursor. The precursor is formed, rapidly heated to the temp. range where a 211 phase and a liq. phase coexist and then slowly cooled to grow the crystal.
Inventors:
IZUMI TERUO
OOTSU KANJI
YAMADA YOUJI
NAKAMURA YUICHI
ISHIGE KENGO
SHIOBARA TORU
OOTSU KANJI
YAMADA YOUJI
NAKAMURA YUICHI
ISHIGE KENGO
SHIOBARA TORU
Application Number:
JP16120292A
Publication Date:
January 11, 1994
Filing Date:
June 19, 1992
Export Citation:
Assignee:
KOKUSAI CHODENDO SANGYO GIJUTS
SUMITOMO METAL IND
KYUSHU ELECTRIC POWER
ASAHI GLASS CO LTD
RAILWAY TECHNICAL RES INST
ISHIKAWAJIMA HARIMA HEAVY IND
SUMITOMO METAL IND
KYUSHU ELECTRIC POWER
ASAHI GLASS CO LTD
RAILWAY TECHNICAL RES INST
ISHIKAWAJIMA HARIMA HEAVY IND
International Classes:
C01G1/00; C01G3/00; C30B29/22; H01B13/00; H01L39/24; (IPC1-7): C30B29/22; C01G1/00; C01G3/00; H01B13/00; H01L39/24
Attorney, Agent or Firm:
Terutaka Hogami
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