Method for making single or mixed metal oxides or silicon oxide
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Mar 13, 2000
filing date -
May 15, 1997
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Abstract
This invention relates to a method of manufacturing a product based on a simple or mixed metal oxide, or silicon oxide, from a charge of one or more precursors comprising one or more organic precursors. These oxides can be, for example, oxides of Ti, Al, Mg, Th, Si, Ba, Bc or Zr etc. The method comprises bringing the charge of organo-metallic precursors into contact with a reaction medium that comprises supercritical C0.sub.2, at a temperature of from 31 to 100.degree. C. and a supercritical pressure of from 3.times.10.sup.7 to 5.times.10.sup.7 Pa, in order to form from the precursor, a product based on a simple or mixed metal oxide, or silicon oxide, from the reaction medium by reducing the pressure of the supercritical C0.sub.2 to a pressure lower than the supercritical pressure.
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