Method for producing microcomposite powders using a soap solutio

Details Method for producing microcomposite powders using a soap solutio Method for producing microcomposite powders using a soap solutio

1994-02-07

1996-01-09

Lieberman, Paul

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Utilizing sol or gel

505100, 505124, 505236, 505238, 505446, 505811, 505734, 252514, 428402, 428403, 428553, 428570, 427125, 427217, H01B 1200, H01L 3912

Patent

active

054829186

ABSTRACT:
A method for producing microcomposite powders for use in superconducting and non-superconducting applications. A particular method to produce microcomposite powders for use in superconducting applications includes the steps of: (a) preparing a solution including ammonium soap; (b) dissolving a preselected amount of a soluble metallic such as silver nitrate in the solution including ammonium soap to form a first solution; (c) adding a primary phase material such as a single phase YBC superconducting material in particle form to the first solution; (d) preparing a second solution formed from a mixture of a weak acid and an alkyl-mono-ether; (e) adding the second solution to the first solution to form a resultant mixture; (f) allowing the resultant mixture to set until the resultant mixture begins to cloud and thicken into a gel precipitating around individual particles of the primary phase material; (g) thereafter drying the resultant mixture to form a YBC superconducting material/silver nitrate precursor powder; and (h) calcining the YBC superconducting material/silver nitrate precursor powder to convert the silver nitrate to silver and thereby form a YBC/silver microcomposite powder wherein the silver is substantially uniformly dispersed in the matrix of the YBC material.

REFERENCES:
patent: 4450188 (1984-05-01), Kawasumi
patent: 4971944 (1990-11-01), Charles et al.
patent: 4988673 (1991-01-01), Ferrando
patent: 5091362 (1992-02-01), Ferrando
patent: 5178909 (1993-01-01), Hayashi
patent: 5338507 (1994-08-01), Anderson et al.

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