Process for depositing layers of zirconium oxide using soluble powders

   
   

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).sub.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.

Um processo do solenóide-sol-gel para produzir camadas de óxido do zirconium é descrito que compreende os seguintes estágios: (i) produção de um soluble, zirconium-contendo o pó perto: (a) a reação de um alcoholate do zirconium da fórmula geral Zr(OR).sub.4, em que os resíduos R são os mesmos ou diferentes e representam straight-chain, ramificou ou resíduos alkyl ou alkenyl cíclicos com os 1 a 10 átomos de carbono, que exibem opcionalmente um ou mais carbonyl e/ou ester e/ou funções carboxyl, com um ou mais composto polar que tem propriedades complexing, chelating, (b) aquecendo a solução, (c) misturando a solução com água, opcionalmente na presença de um catalizador, (d) concentrando a solução até que um pó esteja obtido, (ii) dissolvendo o pó que dá forma a um solenóide, (iii) revestindo uma carcaça com o solenóide, e (iv) recozendo a carcaça revestida.

 
Web www.patentalert.com

< Recovery of precious metal from sulphide minerals by bioleaching

< Method for removing ammonia from a gas comprising hydrogen cyanide, ammonia and water

> Method for the reformation of fuels, in particular heating oil

> METHOD FOR MANUFACTURING HIGH-PURITY POTASSIUM FLUORONIOBATE CRYSTAL, RECRYSTALLIZATION BATH USED IN MANUFACTURING METHOD THEREOF AND HIGH-PURITY POTASSIUM FLUOROTANTALATE CRYSTAL OR HIGH-PURITY POTASSIUM FLUORONIOBATE CRYSTAL OBTAINED BY MANUFACTURING METHOD THEREOF

~ 00164