Method for the preparation of precursors for superconductors and compounds thus obtained
AssigneePirelli Cavi S.p.A.
InventorGiorgio S. Miszenti
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Abstract
Method for the preparation of a precursor for a superconductor, comprising the addition of a condensation product to an aqueous solution of metal salts, the total or partial removal of water from the mixture thus obtained, the subsequent processing of the viscous mass obtained after having removed part of the water or the calcination of the solid gel obtained after having substantially removed all the water, wherein the condensation product is a product of esterification of citric acid with ethylene glycol prepared separately and the solution of metal salts substantially is a solution of acetates in water and acetic acid.
Claims12
A method for preparing a precursor for a superconductor, comprising adding a condensation product to an aqueous solution of metal salts, totally or partially removing water from the mixture thus obtained to make a viscous mass, subsequently processing the viscous mass, wherein the condensation product is an esterification product of citric acid with ethylene glycol which is prepared prior to adding it to the aqueous solution of metal salts and the solution of metal salts is substantially a solution of an acetate of a metal selected from the group consisting of yttrium, barium, bismuth, copper, lead, strontium, calcium and mixtures thereof, in water and acetic acid.
Dependencies are inferred from the claim text.