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The metal which possesses the specified specific surface or granularity (zirconium, hafnium and titanium) production manner null of the pulverized body
The metal which possesses the specified specific surface or granularity (zirconium, hafnium and titanium) production manner null of the pulverized body
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机译:具有指定比表面或粒度(锆,ha和钛)的生产方式的金属,不存在粉体
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摘要
Method for the direct production of a fine powder comprised of crystallites which are little or not agglomerated, of metal oxides such as zirconia, hafnium and/or titanium oxide, having a specific surface or a grain size selected and controlled according to the particular utilization, said grain size having a mean diameter smaller than 0.2 νm, comprising the treatment by hydrolysis of the corresponding metal tetrachloride by means of water vapor by operating at a partial pressure of tetrachloride, set at a predetermined value function of the specific surface or the grain size searched for, comprised between 3 and 30 % of the total pressure of the mixture of all gas components, while maintaining a molar ratio water/metal tetrachloride comprised between 2 and 10.
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