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Process using supercritical conditions for producing highly accurate and homogeneous powder mixture useful in fabrication of high quality ceramic superconductors
Process using supercritical conditions for producing highly accurate and homogeneous powder mixture useful in fabrication of high quality ceramic superconductors
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机译:使用超临界条件生产高精度和均匀粉末混合物的工艺,可用于制造高质量陶瓷超导体
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摘要
A process is disclosed for the formation of a uniform and homogeneous mixture of a plurality of compounds in a desired stoichiometric ratio as a precipitate from a fluid under supercritical processing conditions which comprises dissolving at a first supercritical temperature a stoichiometric mixture of compounds in a fluid in a closed reaction vessel having a fixed first volume and rapidly expanding the volume in which the fluid is confined to lower the density sufficiently to cause the stoichiometric mixture of compounds to precipitate as a unifrom and stoichiometrically accurate mixture of the compounds, preferably without changing the phase of the fluid. The process may be used to form a high quality superconductor material because of the uniform and homogeneous distribution of the precipitated components in a stoichiometrically accurate ratio throughout said mixture.
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