PREPARATION OF HYDROLYSED ZIRCONIUM SALT PRECURSOR

专利名称：PREPARATION OF HYDROLYSED
ZIRCONIUM SALT PRECURSORS AND HIGH
PURITY ZIRCONIA
发明人：HOUCHIN, Martin, Richard
申请号：EP87904014.5
申请日：19870605
公开号：EP0272294B1
公开日：
19921021
专利内容由知识产权出版社提供
摘要：in the production of precipitated zirconif\u00e8res hydrolysis, hydrolysis is carried out by adding a solution of basic zirconium sulphate aqueous acid, to reduce the concentration of h + and maintain the ph between 3 and 7, preferably between 4 and 6.the base can be selected from ammonia, ammonium salts, basic, such as buffered ammonium salts, ammonia, alkali metal hydroxide, carbonate or bicarbonate.specific databases contain ammonia, ammonium hydroxide or sodium \/ potassium carbonate or bicarbonate, ammonia, ammonium hydroxide, and sodium is particularly preferred.the starting materials can be intermittently, combined in a body of water, an electrolyte and a suitable solvent or with a mixture of continuous mixing continuously, in a current flow. an additive in the form of a stabilizer, inorganic or an organic surface active agent may also be included.inorganic stabilizers may be selected from one or more of the following compounds: y2o3, al2o3, mgo and cao ce2o3, or a precursor of the compound. in the final stage, we could add an extra bases, in order to reduce the content of residual sulfate or trichloroacetic acid to. remove acid soluble impurities.the produced precipitate is then separated by filtration, washed, for example) and calcined to produce the pure zirconia.
high purity zirconium is particularly applicable to the production of electronic products and partially stabilized zirconia ceramics.
申请人：COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION 地址：LIMESTONE AVENUE; CAMPBELL, AUSTRALIAN CAPITAL TERRITORY 2601
代理机构：Andrae, Steffen, Dr.
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