- 专利标题: Iron-silicon oxide particles having an improved heating rate
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申请号: US14418989申请日: 2013-07-17
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公开(公告)号: US10204723B2公开(公告)日: 2019-02-12
- 发明人: Stipan Katusic , Harald Alff , Peter Albers , Harald Herzog , Peter Kress
- 申请人: Stipan Katusic , Harald Alff , Peter Albers , Harald Herzog , Peter Kress
- 申请人地址: DE Essen
- 专利权人: EVONIK DEGUSSA GmbH
- 当前专利权人: EVONIK DEGUSSA GmbH
- 当前专利权人地址: DE Essen
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: DE102012213986 20120807
- 国际申请: PCT/EP2013/065063 WO 20130717
- 国际公布: WO2014/023540 WO 20140213
- 主分类号: H01F1/01
- IPC分类号: H01F1/01 ; H01F1/11 ; B05D1/02 ; C09K3/14 ; C01G49/00 ; C01G49/02 ; C09C1/24
摘要:
Core-shell particles containing crystalline iron oxide in the core and amorphous silicon dioxide in the shell and in which a) the shell contains from 5 to 40% by weight of silicon dioxide, b) the core contains b1) from 60 to 95% by weight of iron oxide and b2) from 0.5 to 5% by weight of at least one doping component selected from the group consisting of aluminum, calcium, copper, magnesium, silver, titanium, yttrium, zinc, tin and zirconium, c) where the % by weight indicated are based on the core-shell particles and the sum of a) and b) is at least 98% by weight of the core-shell particles, d) the core has lattice plane spacings of 0.20 nm, 0.25 nm and 0.29 nm, in each case+/−0.02 nm, determined by means of HR-TEM.