Process for producing molded bodies from precursors of high-temp

Details Process for producing molded bodies from precursors of high-temp Process for producing molded bodies from precursors of high-temp

1992-12-18

1994-07-12

Silbaugh, Jan H.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

With melting

264317, 264332, 505739, 505410, H01L 3912, B29C 3376

Patent

active

053288904

ABSTRACT:
To produce more complex molded bodies from precursors of high-temperature superconductors based on the oxides of bismuth, strontium, calcium and copper, the homogeneous melt of these oxides is cast in molds at temperatures of 870.degree. to 1000.degree. C. In this process, the geometrically appropriately shaped molds are composed of a material having a melting point of at least 1000.degree. C. Finally, the molds containing solidified melt of the oxides of bismuth, strontium, calcium and copper are treated with dilute hydrofluoric acid at temperatures of 20.degree. to 90.degree. C. until the molds are dissolved.

REFERENCES:
patent: 2974388 (1961-03-01), Ault
patent: 3429962 (1969-02-01), Krystyniak
patent: 5047391 (1991-09-01), Bock et al.
patent: 5215961 (1993-06-01), Rayne et al.
World Patents Index 91-15945 [22], 1991 (Abstract only).
World Patents Index, 80 85484C [48], 1980 (Abstract only).

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