Hollow oxide particle and process for producing the same

Details Hollow oxide particle and process for producing the same Hollow oxide particle and process for producing the same

1998-10-05

1999-12-21

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423625, 423628, C01F 700

Patent

active

060045256

ABSTRACT:
The present invention provides a hollow oxide particle including a shell wall constituting a hollow room, and the shell wall has a thickness of 20 nm or less. The shell wall may be mainly composed from at least one selected from the group consisting of alumina, spinel, iron oxides, yttrium oxides, and titanium oxides. A process for producing the hollow oxide particle comprises the steps of: forming a Water in Oil (W/O) type emulsion including aqueous microspheres having a each diameter of 100 nm or more, by adding an organic solvent to an aqueous solution dissolving and/or suspending at least one of metal salts and metal compounds; and forming the hollow oxide particle by atomizing the Water in Oil (W/O) type emulsion to burn. When the hollow oxide particle is brought into contact with a water-containing solution, a surface of the shell wall may have a minutely irregular surface.

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Yuksel Sarikaya, et al., "Preparation of Alumina Microshells by the Emulsion Evaporation Technique," Ceramics International, vol. 14, (1988), pp. 239-244.

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