Oxide superconductive wire material making method and heat treatment apparatus for said method

A technology of superconducting wire rod and manufacturing method, which can be applied in the manufacture/processing of superconductor devices, cable/conductor manufacture, superconductive devices, etc., and can solve problems such as inability to effectively prevent gas expansion.
CN1333539AInactive Publication Date: 2002-01-30SUMITOMO ELECTRIC IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUMITOMO ELECTRIC IND LTD
Publication Date
2002-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The method of preparing an oxide superconducting wire comprises steps of preparing a wire by coating raw material powder for a Bi-Pb-Sr-Ca-Cu-O based oxide superconductor including a 2223 phase with a metal and heat treating the wire in a pressurized atmosphere containing oxygen in a prescribed partial pressure, and the total pressure of the pressurized atmosphere is at least 0.5 MPa. The pressure heat treatment apparatus comprises a pressure furnace (1) storing and heat treating a target in a pressurized atmosphere, a pressure regulator (3) for measuring the total pressure in the pressure furnace (1), an oxygen concentration meter (5) for measuring the oxygen concentration in the pressure furnace (1) and a controller (12) for controlling the oxygen partial pressure in the pressure furnace (1) in response to the total pressure measured by the pressure regulator (3) and the oxygen concentration measured by the oxygen concentration meter (5).
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Description

technical field

[0001] The present invention relates to a method for producing an oxide superconducting wire and a heat treatment device used in the production method, and more particularly to a method for producing an oxide superconducting wire having an effect of preventing wire expansion during sintering and a heat treatment device used in the production method. Background technique

[0002] A method for producing an oxide superconducting wire has been known in the past. After filling an oxide superconductor raw material powder in a metal tube, the metal tube is subjected to wire drawing and drawing processing, and the obtained wire rod is heat-treated to make the oxide superconductor raw material The powder is sintered to obtain an oxide superconducting wire. However, there is a problem that the obtained oxide superconducting wire has low superconducting characteristics due to the expansion of the wire in the above-mentioned sintering heat treatment step.

[0003] In Ja...

Claims

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