Title:
PRODUCTION OF BISMUTH-CONTAINING OXIDE SUPERCONDUCTING WHISKER
Document Type and Number:
Japanese Patent JP3160028
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for producing bismuth-contg. oxide superconducting whiskers by which a larger amt. of whiskers can be obtd. as compared with the conventional method.
CONSTITUTION: Powdery starting material having 1:1:1:2:0.5 ratio of Bi:Sr:Ca:Cu: Al is prepd. by blending Bi2O3 with SrCO3, CaCO3, CuO and Al(OH)3. This starting material is melted and the resulting melt is rapidly cooled by suction into a quartz tube to form a cylindrical body. This body is pulverized in an alumina ball mill for 30min and pelletized by pressing under 400kg/cm2 pressure while carrying out evacuation. The resulting pellets are put in an electric furnace and heat-treated at 855°C for 75hr in the air to obtain the objective bismuth-contg. oxide superconducting whiskers.
Inventors:
Yoshihiro Abe
Hideo Hosono
Kazumi Hirata
Kazuo Michishita
Akira Saji
Noboru Kuroda
Hideo Hosono
Kazumi Hirata
Kazuo Michishita
Akira Saji
Noboru Kuroda
Application Number:
JP26824691A
Publication Date:
April 23, 2001
Filing Date:
September 18, 1991
Export Citation:
Assignee:
Yoshihiro Abe
Tokyo Ceramic Co., Ltd.
Tokyo Ceramic Co., Ltd.
International Classes:
C01G1/00; C01G29/00; C04B35/00; C04B35/45; C04B35/653; C30B29/62; H01B12/02; H01B13/00; H01L39/12; (IPC1-7): C30B29/62; C01G1/00; H01B12/02; H01B13/00; H01L39/12
Domestic Patent References:
| JP3170334A | ||||
| JP2252621A |
Attorney, Agent or Firm:
Hidehiko Okada (2 outside)
Sawao Ohya
Sawao Ohya
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