Method for making high purity metal oxide particles and materials made thereof
AssigneeMomentive Performance Materials Inc.
InventorAntonio L. DeVera
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Abstract
The present invention is directed to a method of making metal oxide and mixed metal oxide particles. The method includes treating a mixture formed from a metal source, such as metal alkoxide, a surfactant, and a first alcohol in an aqueous media at a very high metal oxide yield. The mixture is reacted using a catalyst to form metal oxide particles having a desired particle size in said mixture. The method is particularly suitable for forming silica particles. The metal oxide particles can then be heat treated to form synthetic fused metal oxides such as, for example, synthetic fused silica.
Claims28
A method for making metal-containing particles comprising:
- (a) forming a first phase comprising a mixture of water, a metal source, a first catalyst, a first surfactant, and a first alcohol;
- b) adding the first phase to a second phase comprising water, a second alcohol, and a second surfactant to form a blend;
- (c) treating the blend with a phase enhancer, the phase enhancer being separately added to the blend via a composition other than that of the first phase or the second phase;
- and
- (d) treating the blend from (c) with a second catalyst to form metal-containing particles.
Dependencies are inferred from the claim text.