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Method for preparing Nb3Al superconducting material by using electrical co-deoxidization method

A superconducting material and molecular formula technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of low purity of niobium material, high production cost, complicated process, etc. The effect of conductivity, low energy and low temperature

Inactive Publication Date: 2011-02-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods must first process niobium and aluminum into tubes, strips or plates, then process and compound them, and then wire drawing and heat treatment. Pure processing and therefore high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Embodiment: the specific process and steps in this embodiment are as follows:

[0021] (1) Press Nb 3 Al molecular formula stoichiometric molar ratio converted to Nb 2 o 5 and Al 2 o 3 The required amount; using 99.9% Nb 2 o 5 and Al 2 o 3 High-purity powder is used for weighing and batching;

[0022] (2) Mixing: Mixing adopts the ball mill wet mixing method with alcohol as the medium to achieve full uniformity;

[0023] (3) Compression: Mold the above mixture into blocks, and the compression pressure is 10MPa;

[0024] (4) Sintering: Sinter the above oxide mixture at a sintering temperature of 1300°C to obtain a sintered block;

[0025] (5) Use the niobium-aluminum oxide sintered block obtained above as the cathode, and use nickel-chromium wire to lead out to connect with the electrical device, use the graphite rod as the anode, and also use the nickel-chrome wire to lead out to connect with the electrical device; CaCl 2 -NaCl is used as a molten salt elect...

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PUM

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Abstract

The invention relates to a method for preparing a Nb3Al superconducting material by using an electrical co-deoxidization method, belonging to the technical filed of metal material manufacturing. The method is characterized by comprising the following steps of: mixing, pressing and sintering high-purity Nb2O5 and Al2O3 powder to obtain sintered blocks, taking the obtained niobium-aluminum oxide sintered blocks as a cathode, taking graphite as an anode, and performing electrochemical process treatment in a CaCl2-NaCl molten salt electrolyte and under the protection of Ar gas; preparing a co-deoxidized niobium-aluminum composite powder material; densifying the niobium-aluminum composite powder material through liquid-phase sintering, alloying the densified niobium-aluminum composite material at the high-temperature of 1400-1700 DEG C and under the protection of Ar gas; and finally preparing the Nb3Al intermetallic compound superconducting material.

Description

technical field [0001] The present invention relates to a kind of Nb 3 Preparation method of Al superconducting material. The invention belongs to the technical field of metal material manufacturing technology. Background technique [0002] Niobium has a high superconducting transition temperature, and niobium-tin and niobium-aluminum alloys formed from niobium, tin and aluminum are good superconductors. Nb developed successively over the past 10 years 3 Al, Nb 3 (Al,Ge) and Nb 3 Sn is a strong magnetic field superconducting material with a high critical current density J c , critical temperature T c and the critical magnetic field H c . It can meet the working requirements of greater than 40KA and 10T high current and high magnetic field. The study of the relationship between stress and strain under a strong magnetic field shows that Nb 3 A1 has a higher ratio than Nb 3 Sn wire has better stress resistance properties and is similar to Nb 3 The irradiation sensit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36C22F1/18C22C1/00H01B12/00C22C27/02
CPCY02E40/64Y02E40/60
Inventor 王兴庆谢大海
Owner SHANGHAI UNIV
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