发明名称 |
Preparation of nano-crystalline magnetic ferric oxide powder comprises adjusting the pH of a solution mixture by adding an alkaline solution, heating the mixture and separating the magnetic particles from the mixture by centrifugation |
摘要 |
<p>Preparation of nano-crystalline magnetic ferric oxide powder with an average particle size of 15 nm from an aqueous solution by cyclic precipitation comprises adjusting the pH value of a solution mixture containing ferric and ferrous salts (in a molar ratio of 1-2 and with total concentration of 0.4-1.3 mol/l) to 6.5-7 by adding an alkaline solution; again adding the ferric and ferrous salt to the precipitated mixture; heating the mixture for 5-30 minutes to terminate the reaction and separating the magnetic particles by centrifugation process.</p> |
申请公布号 |
DE102005030301(A1) |
申请公布日期 |
2006.12.28 |
申请号 |
DE20051030301 |
申请日期 |
2005.06.27 |
申请人 |
INSTITUT FUER PHYSIKALISCHE HOCHTECHNOLOGIE E.V. |
发明人 |
MUELLER, ROBERT;STEINMETZ, HANNA;GAWALEK, WOLFGANG |
分类号 |
H01F1/11;C01G49/08 |
主分类号 |
H01F1/11 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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