发明授权
- 专利标题： Synthetic tetra-silicic mica and water sol thereof
- 专利标题（中）： 合成四硅云母及其水溶胶
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申请号： US669451申请日： 1976-03-22
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公开(公告)号： US4067819A公开(公告)日： 1978-01-10
- 发明人: Nobutoshi Daimon , Kunio Kitajima
- 申请人： Nobutoshi Daimon , Kunio Kitajima
- 专利权人： Nobutoshi Daimon,Kunio Kitajima
- 当前专利权人： Nobutoshi Daimon,Kunio Kitajima
- 主分类号： C01B33/42
- IPC分类号： C01B33/42 ; C08K3/34 ; B01J13/00 ; C01B33/24
摘要：
This invention relates to a process for producing a tetra-silicic mica having the formula Na.sub.0.6 - 0.8 Mg.sub.2.6 - 2.7 (Si.sub.4 O.sub.10)F.sub.2 which comprises mixing components selected from the group of sodium fluoride (NaF, sodium silicofluoride (Na.sub.2 SiF.sub.6), magnesium fluoride (MgF.sub.2), magnesia (MgO) and silica (SiO.sub.2) in a mole ratio of (a) 1 - 1.2 NaF : 0.5 - 1.2 MgF.sub.2 : 2 MgO : 4 SiO.sub.2 or (b) 0.5 - 0.8 Na.sub.2 SiF.sub.6 : 0.5 - 1.2 MgF.sub.2 : 2 MgO : 4 SiO.sub.2, melting the mixture at a temperature of 1300.degree. C to 1500.degree. C and cooling the melt to obtain a crystal.This invention further relates to a water sol of flake-like ultra-fine particles of tetra-silicic mica produced in accordance with claim 1, wherein most of the flake-like particles dispersed in water have a thickness of less than 50 A and an average diameter of the flat plane of between 500 A and 3000 A.
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