Patent · US Active

Process for producing nanoparticles and their use in the production of high-temperature superconductors

US9257628B2 · kind B2 · utility

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17Claims

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Assignee

BASF SE

Inventors

Thomas Freudenberg · Dresden, DE
Bernhard Holzapfel · Winnenden, DE
Oliver Brunkahl · Remagen, DE
Michael Baecker · Cologne, DE

Key dates

Filing date	Mar 20, 2013
Grant date	Feb 9, 2016
Priority date	—
Expiry date	Mar 20, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/5454
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Known processes for the production of nanoparticles of compounds of the transition metals Zr, Ti, Ta, rare earths (RE), Mn, and Fe via microemulsions lead to products that contain impurities from the reactants, particularly water, which make the further use of said nanoparticles difficult, for instance in high-temperature super conductors (HTSC). It is proposed that the nanoparticles be produced via anhydrous microemulsions having an outer phase composed of a nonpolar solvent and inner phase composed of a polar anhydrous solvent. The nanoparticles thus obtained exhibit good monodispersity and can be used in the production of REBa2Cu3O7 super conductors by incorporation into the precursor coating solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.