发明公开
EP0453270A2 Rare-earth based magnetic materials, production process and use
失效
Seltenerd-basierte magnetische Materialien，Herstellungsverfahren und Anwendung。
- 专利标题： Rare-earth based magnetic materials, production process and use
- 专利标题（中）： Seltenerd-basierte magnetische Materialien，Herstellungsverfahren und Anwendung。
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申请号： EP91303442.7申请日： 1991-04-17
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公开(公告)号： EP0453270A2公开(公告)日： 1991-10-23
- 发明人: Coey, John Michael David , Sun, Hong
- 申请人： THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN
- 申请人地址： Dublin 2 IE
- 专利权人： THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN
- 当前专利权人： THE PROVOST, FELLOWS AND SCHOLARS OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN
- 当前专利权人地址： Dublin 2 IE
- 代理机构： Baldock, Sharon Claire
- 优先权： IE135990 19900418; IE320190 19900904; IE67191 19910228
- 主分类号： H01F1/053
- IPC分类号： H01F1/053
摘要：
A new magnetic material of the general formula:
R x Fe y X′ a Z b
is derived from an intermetallic compound of rhomohedral or hexagonal crystal structure wherein R is one or more rare earth elements, X′ is an element of groups IIIA, IIIB, IVA or IVB of the periodic table, Z is one or more elements of group VA of the periodic table, x is a value from 1 to 2, y is a value from 11 to 19, a is a value from 0 to 3, b is a value from 0.5 to 3 and Fe is unsubstituted or partly, substitued with the proviso that if the component Z is antimony or bismuth the element X′ is not boron.
These new materials exhibit increased Curie temperatures, magnetic strength and easy uniaxial anisotropy and are therefore suitable for fabricating into permanent magnets. Processes for preparing materials R x Fe y X′ a Z b are also described.
R x Fe y X′ a Z b
is derived from an intermetallic compound of rhomohedral or hexagonal crystal structure wherein R is one or more rare earth elements, X′ is an element of groups IIIA, IIIB, IVA or IVB of the periodic table, Z is one or more elements of group VA of the periodic table, x is a value from 1 to 2, y is a value from 11 to 19, a is a value from 0 to 3, b is a value from 0.5 to 3 and Fe is unsubstituted or partly, substitued with the proviso that if the component Z is antimony or bismuth the element X′ is not boron.
These new materials exhibit increased Curie temperatures, magnetic strength and easy uniaxial anisotropy and are therefore suitable for fabricating into permanent magnets. Processes for preparing materials R x Fe y X′ a Z b are also described.
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