| 摘要 |
A sol-gel process for the production of titanium oxide layers which comprises the following stages:(i) preparation of a soluble, titanium-containing powder by:(a) reaction of a titanium alcoholate of the general formula Ti(OR)4, in which the radicals R are identical or different and represent straight-chain, branched or cyclic alkyl or alkenyl radicals having 1 to 10 carbon atoms, which optionally have one or more carbonyl and/or ester and/or carboxyl functions, with one or more polar compounds with completing, chelating properties,(b) heating of the solution,(c) adding of water to the solution, optionally in the presence of a catalyst,(d) concentrating of the solution until a powder is obtained,(ii) dissolving of the powder to form a sol,(iii) coating of a substrate with the sol and(iv) heating of the coated substrate, described.
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