Method for producing ceramic bodies

Details Method for producing ceramic bodies Method for producing ceramic bodies

1990-03-14

1992-09-08

Derrington, James

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

264 56, 264570, 264332, 505733, 505739, 505742, H01B 1200

Patent

active

051458330

ABSTRACT:
This invention provides a process for producing a ceramic body by heating a ceramic material, such as particulate zirconium oxide, to a temperature greater than about 30 percent of the material's melting temperature, but less than said melting temperature, and thereafter applying sufficient isostatic pressure to consolidate the ceramic material into a body having a density of at least 85 percent of the theoretical density of the material.
This invention also provides a process for producing superconducting ceramic articles such as those represented by the general formula YBa.sub.2 Cu.sub.3 O.sub.7-x where 0<x<0.6. Starting materials for such articles include sources of yttria, cupric oxide and barium monoxide. The general process parameters for the ceramic body process are modified to accomodate the starting materials. The ceramic body process is further modified by an optional precursor step wherein the starting materials are placed in a container and by certain finishing steps including annealing and cooling in the presence of oxygen.
This invention also concerns the ceramic body and the superconducting ceramic article prepared by the foregoing processes.

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Superconductivity and its Applications, 20th Apr. 1988, pp. 94-99, H. S. Kwok et al., "Hot Isostatic Pressing (HIP) of Oxide Superconductors".

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