发明授权
- 专利标题: Method of precipitating metal titanate powders
- 专利标题(中): 沉淀金属钛酸盐粉末的方法
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申请号: US880193申请日: 1986-06-30
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公开(公告)号: US4670243A公开(公告)日: 1987-06-02
- 发明人: James M. Wilson , Dana L. Coller , Subramaniam Venkataramani
- 申请人: James M. Wilson , Dana L. Coller , Subramaniam Venkataramani
- 申请人地址: OH Cleveland
- 专利权人: Ferro Corporation
- 当前专利权人: Ferro Corporation
- 当前专利权人地址: OH Cleveland
- 主分类号: C01G23/00
- IPC分类号: C01G23/00
摘要:
A titanium acylate solution is produced by adding glacial acetic acid to tetra-isopropyl titanate. Distilled water is then added until the solution clears, and a high grade alkaline-earth metal carbonate, such as BaCO.sub.3, SrCO.sub.3 or CaCO.sub.3, or a combination thereof, is added and agitated until the earth-metal dissolves and the solution again becomes clear. An alkaline hydroxide, such as NaOH, is added until the pH of the solution reaches 13 or 10 above, and causes crystals of an earth-metal titanate to form in the solution. The solution is thereafter filtered to produce an alkaline-earth metal titanate filter cake which is then dried and washed to produce the desired powder. At no time during the process is it necessary to apply any external heat to the solution. The heat of reaction is sufficient.
公开/授权文献
- US5269455A Socket 公开/授权日:1993-12-14
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