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