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1.发明授权Method for producing soft magnetic hexagonal ferrite sintered material and soft magnetic hexagonal ferrite sintered material 失效软磁六方铁氧体烧结材料和软磁六方铁氧体烧结材料的制造方法公开(公告)号：US07025946B2
公开(公告)日：2006-04-11
申请号：US10225647
申请日：2002-08-21
IPC分类号： C04B35/26
CPC分类号： H01F1/348 , B32B18/00 , C04B35/2683 , C04B35/6261 , C04B35/6262 , C04B35/62625 , C04B35/6268 , C04B2235/3213 , C04B2235/3215 , C04B2235/3274 , C04B2235/3296 , C04B2235/5296 , C04B2235/5436 , C04B2235/5445 , C04B2235/767 , C04B2235/787 , C04B2237/704
摘要： A soft hexagonal ferrite sintered material includes crystal particles of M-type hexagonal ferrite corresponding to a general chemical formula MFe12O19 wherein M is at least one element selected from the group consisting of Ba, Sr and Pb. Crystal particles having particle diameters of 5 μm to 100 μm are extracted from a sintered material produced from a precursor powder mixture. The extracted particles as seed crystals are mixed with a calcined powder comprising fine crystals having the above composition and particle diameters of 0.5 μm to 3 μm, then is sintered until the intended particle growth of the crystal particles in the sintered material is achieved to give an average particle diameter of 30 μm to 500 μm.
摘要翻译： 软六角铁氧体烧结材料包括对应于一般化学式MFe 12 O 19的M型六角铁氧体的晶体颗粒，其中M是选自以下的至少一种元素： 由Ba，Sr和Pb组成。 从由前体粉末混合物制备的烧结材料中提取粒径为5〜100μm的结晶粒子。 将作为晶种的提取的颗粒与包含上述组成和粒径为0.5μm至3μm的细晶体的煅烧粉末混合，然后烧结直到实现烧结材料中晶体颗粒的预期颗粒生长，得到 平均粒径为30〜500μm。
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公开(公告)号：US06870497B2
公开(公告)日：2005-03-22
申请号：US10911444
申请日：2004-08-04
CPC分类号： H01Q17/004
摘要： A radio wave absorber is provided which can be produced at a low cost compared to the case of using silicon carbide fiber and which is also superior in radio wave absorption property in 76 GHz band (75-77 GHz frequency band). The radio wave absorber is produced by arranging a radio wave absorbing layer onto the surface of a metal body. The radio wave absorbing layer is made of a radio wave absorbing material containing silicon carbide powder dispersed in matrix resin. Average particle diameter of the silicon carbide powder is 4-40 μm. Silicon carbide powder content in the radio wave absorbing material is 15-45 volume %. Thickness of the radio wave absorbing layer is adjusted so that reflection attenuation of not less than 10 dB is provided in 76 GHz band.
摘要翻译： 提供了与使用碳化硅纤维的情况相比低成本地制造的电波吸收体，并且在76GHz频带（75-77GHz频带）中的电波吸收特性也优异。 通过在金属体的表面上配置无线电波吸收层来制造无线电波吸收体。 无线电波吸收层由分散在基体树脂中的碳化硅粉末的无线电波吸收材料制成。 碳化硅粉末的平均粒径为4-40μm。 无线电波吸收材料中的碳化硅粉末含量为15-45体积％。 调整无线电波吸收层的厚度，使得在76GHz频带中提供不小于10dB的反射衰减。
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公开(公告)号：US20050030218A1
公开(公告)日：2005-02-10
申请号：US10911444
申请日：2004-08-04
CPC分类号： H01Q17/004
摘要： A radio wave absorber is provided which can be produced at a low cost compared to the case of using silicon carbide fiber and which is also superior in radio wave absorption property in 76 GHz band (75-77 GHz frequency band). The radio wave absorber is produced by arranging a radio wave absorbing layer onto the surface of a metal body. The radio wave absorbing layer is made of a radio wave absorbing material containing silicon carbide powder dispersed in matrix resin. Average particle diameter of the silicon carbide powder is 4-40 μm. Silicon carbide powder content in the radio wave absorbing material is 15-45 volume %. Thickness of the radio wave absorbing layer is adjusted so that reflection attenuation of not less than 10 dB is provided in 76 GHz band.
摘要翻译： 提供了与使用碳化硅纤维的情况相比低成本地制造的电波吸收体，并且在76GHz频带（75-77GHz频带）中的电波吸收特性也优异。 通过在金属体的表面上配置无线电波吸收层来制造无线电波吸收体。 无线电波吸收层由分散在基体树脂中的碳化硅粉末的无线电波吸收材料制成。 碳化硅粉末的平均粒径为4-40μm。 无线电波吸收材料中的碳化硅粉末含量为15-45体积％。 调整无线电波吸收层的厚度，使得在76GHz频带中提供不小于10dB的反射衰减。
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