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公开(公告)号：EP1026267A4
公开(公告)日：2004-12-15
申请号：EP99922573
申请日：1999-05-28
申请人： NEOMAX CO LTD
发明人： YAMASHITA OSAMU , MAKITA KEN , NOUMI MASAO , SAIGO TSUNEKAZU
IPC分类号： B22F3/16 , C21D8/12 , C22C33/02 , C22C38/02 , B22F3/18 , B22F3/20 , B22F5/00 , C22C33/04 , C22C38/00 , H01F1/147
CPC分类号： C22C33/0278 , B22F3/162 , B22F2003/248 , B22F2998/00 , B22F2998/10 , B22F2999/00 , C21D8/1233 , C21D8/1272 , C22C33/0207 , C22C33/0257 , C22C38/02 , B22F3/10 , B22F3/18 , B22F3/26 , B22F3/16 , B22F3/24 , C23C10/00
摘要： A method for the production by rolling of a silicon steel sheet having a silicon content of 3 wt.% or more and a sendust steel sheet, which comprises conducting a cold rolling by utilizing, as a material to be rolled, a sintered sheet or a quenched steel sheet having an average crystal grain diameter of 300 νm or less or a sintered sheet derived from a powder obtained by blending a pure Fe powder and a Fe-Si powder in a specific ratio so that a Fe-rich phase remains in the sintered sheet. The production by rolling of such a high silicon steel sheet and a sendust steel sheet has been considered to be impossible hitherto. A method which further comprises adding, in advance, a non-magnetic metal element such as Ti is also disclosed, which results in allowing a Fe-rich phase and a Si-rich phase to easily form a solid solution and in promoting the growth of a crystal grain, to provide a silicon steel sheet having excellent magnetic properties. A method for producing a sendust steel sheet having excellent magnetic properties which comprises vapor-depositing aluminum on both the sides of this silicon steel sheet and then subjecting it to heat treatment, to thereby diffuse and penetrate the aluminum into the steel sheet and at the same time increase a crystal grain diameter.
摘要翻译： 本发明的一个目的是通过轧制具有3重量％以上的硅含量，传统上认为是不可能的，硅钢和通过滚压薄铁硅铝磁合金片实现制造。 粉末冶金制造是使用粉末作为起始原料使用，并且片状烧结体或快速冷却钢板的平均晶体粒径是由300微米或更小，由此晶粒内滑移变换滑转换之后发生 在晶界，因此冷轧变得可能。 此外，混合物粉末worin纯铁粉和Fe-Si粉末以规定的比例混合在一起来制造用粉末冶金技术，富铁相的被导致残留在烧结体，由此冷轧是可能 使用这些晶粒的塑料转化。 进一步，当非磁性金属元素的微量：预先添加如Ti，V，或Al等，它变得容易使富铁相和富硅相进入退火时固溶体 ，晶粒生长可以促进，所制造的钢板的磁特性变得大致相当于那些常规锭材料制成，并且硅钢片参展优秀磁性能来制造。 使用该轧制硅钢板，之后将铝气相沉积到薄片的bothsides，铝被扩散并渗透到做薄片的内部，并且晶粒直径粗大化的同时，通过加热处理， 由此薄铁硅铝片可以得到表现出等同于锭材料的突出的磁特性。 该材料的应用程序可以在很宽的范围内做了包括变压器和轭元件等变宽
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公开(公告)号：EP1083610A4
公开(公告)日：2007-02-21
申请号：EP00908000
申请日：2000-03-10
申请人： NEOMAX CO LTD
摘要： An Si-base thermoelectric conversion material and a thermoelectric conversion element, wherein without lowering the Seebeck coefficient and electric conductivity of the Si-base thermoelectric conversion material, the heat conductivity of the material can be greatly lowered to realize a great improvement in performance index. A crystalline structure, which is a polycrystalline structure, having crystal grains of Si-rich phase and also having an added element-rich phase containing one or more added elements precipitated in the grain boundaries is formed, whereby the Seebeck coefficient becomes very high and the heat conductivity becomes low, making it possible to greatly increase the thermoelectric conversion efficiency; thus, there is provided an Si-base thermoelectric conversion material consisting mainly of Si, which is a naturally abundant element, and causing least environmental pollution. For example, the addition of C, Ge or Sn to the Si-base thermoelectric conversion material makes it possible to greatly reduce the heat conductivity without changing the carrier concentration in the Si-base material. To lower the heat conductivity, the optimum amount of addition is 5-10 atom percent. The material has a structure in which the group IV elements and addition elements added to prepare p-type or n-type semiconductors precipitate in the grain boundaries of the polycrystalline Si, whereby there is obtained a p-type or n-type semiconductor having a carrier concentration of 10 - 10 (M/m ) and a heat conductivity of 50 W/m•K or less.
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