Basf Se Corporation

Oliver Brunkahl

Michael Baecker

Martina Falter

Bernhard Holzapfel

Michael Bäcker

Thomas Freudenberg

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 REBaCuOsuper conductors by incorporation into the precursor coating solution.

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

A high-temperature superconductor layer arrangement includes at least one substrate and one textured buffer layer made of oxidic material. The buffer layer displays at least one further constituent forming a homogeneous mixed-crystal layer. The further constituent is a transition metal from the first subgroup and/or forming at least a partial melt with the oxidic buffer material at an annealing temperature of &#x2266;1,600 degrees Celsius. The further constituent can particularly be copper and/or silver.

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Remagen, Germany

Oliver Brunkahl