Preparation of metal oxide conductive powders
AssigneeEastman Kodak Company
InventorsJean C. Robert, Jean I. Lemerle
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Abstract
The invention relates to the preparation of conductive metal oxide powders. The method according to the invention comprises the following stages: a) a colloidal aqueous solution of crystalline particles of at least one metal oxide or a composite oxide of several metals is formed, by hydrolysing a starting solution containing metal ions and an agent for complexing the metals, (b) heat treatment is carried out. Any residual salts and residual complexing agent are eliminated before or during the heat treatment (b). Application to the manufacture of antistatic coatings.
Claims10
A method for obtaining conductive metal oxide powders comprising tin oxide or mixed tin and antimony oxide or mixed tin and indium oxide, comprising the following steps:
- (a) obtaining a colloidal aqueous solution of crystalline particles formed by hydrolysing at a pH lower than 5 a starting solution containing aqueous soluble metal salts of one or more metal ions chosen amongst Sn.sup.4+ or Sn.sup.2+ and optionally, In.sup.3+, Sb.sup.3+ or Sb.sup.5+ ions and a complexing agent for such metals ions;
- (b) converting the crystalline particles formed under (a) into metal oxide by heat treatment at a temperature from 250.degree. to 400.degree. C.
Dependencies are inferred from the claim text.