公开(公告)号：US06749767B2

公开(公告)日：2004-06-15

申请号：US10099980

申请日：2002-03-19

申请人： Hiroyuki Mitani ,  Tsukasa Yuri ,  Kazuhisa Fujisawa ,  Yoshikazu Seki ,  Masahiro Murakami ,  Hirofumi Houjou

发明人： Hiroyuki Mitani ,  Tsukasa Yuri ,  Kazuhisa Fujisawa ,  Yoshikazu Seki ,  Masahiro Murakami ,  Hirofumi Houjou

IPC分类号： H01F124

CPC分类号： H01F41/0246 ,  H01F1/26

摘要： A mixed powder useful as a starting material for dust core comprises a uniform mixture of a soft magnetic powder and a binder resin so that the resultant dust core has an electric resistance capable of suppressing an eddy current between the soft magnetic powdery particles and high mechanical strength at room temperatures and also at high temperatures. In the mixed powder, the binder resin is made of a phenolic resin powder which has a methylol groups in the molecule and preferably has an average particle size of 30 &mgr;m or below and wherein when the phenolic resin powder is dissolved in boiling methanol in large excess, a content of an undissolved matter is at least 4 wt % based on the total of the phenolic resin. A dust core obtained from the mixed powder and its fabrication method are also described.

摘要翻译： 作为粉芯的起始材料可以使用的混合粉末包括软磁粉末和粘结剂树脂的均匀混合物，使得所得的粉尘芯具有能够抑制软磁粉末颗粒之间的涡流的电阻和高的机械强度 在室温和高温下。 在混合粉末中，粘合剂树脂由分子中具有羟甲基的酚醛树脂粉末制成，优选平均粒径为30μm以下，其中当酚醛树脂粉末溶解在大量过量的沸腾甲醇中时 ，未溶解物质的含量相对于酚醛树脂的总量为至少4重量％。 还描述了从混合粉末获得的粉尘芯及其制造方法。

公开(公告)号：US06537389B1

公开(公告)日：2003-03-25

申请号：US09284368

申请日：1999-08-13

申请人： Wilfried Aichele ,  Hans-Peter Koch

发明人： Wilfried Aichele ,  Hans-Peter Koch

IPC分类号： H01F124

CPC分类号： H01F1/26 ,  H01F1/24 ,  H01F41/0246

摘要： A magnetically soft, moldable composite material include powder grains coated with nonmagnetic thermoplastic compounds or with molecular precursors for ceramics or with intermetallic compounds, the magnetic properties of the magnetically soft composite material being adjustable in that fashion. Also described is a method for manufacturing a magnetically soft, shapable composite material coated in that fashion, which can subsequently be processed into shaped parts.

摘要翻译： 磁性柔软的可模制复合材料包括涂覆有非磁性热塑性化合物的粉末颗粒或具有陶瓷或金属间化合物的分子前体，磁性软复合材料的磁性能可以以这种方式调节。 还描述了一种用于制造以这种方式涂覆的磁性柔软的可成形复合材料的方法，其随后可以被加工成成形部件。

公开(公告)号：US06486822B1

公开(公告)日：2002-11-26

申请号：US09588892

申请日：2000-06-07

申请人： Douglas J. Peterman

发明人： Douglas J. Peterman

IPC分类号： H01F124

CPC分类号： H01F1/28 ,  H01F1/24 ,  H01Q17/004

摘要： Coated ferromagnetic particles are provided which are useful as radar absorbing material (RAM). In particular, ferromagnetic particles such as iron, carbonyl iron, cobalt, nickel, and alloys thereof are provided that have been coated with a protective non-conducting material such as silicon, silicon dioxide, aluminum oxide, and the like. The ferromagnetic particles are coated in a rotating retort containing a gaseous composition that deposits onto or diffuses into the particle. The coated particles of the present invention are particularly suitable for incorporation into RAM coating compositions intended for use in corrosive atmospheres.

摘要翻译： 提供了可用作雷达吸收材料（RAM）的涂覆铁磁颗粒。 特别地，提供了已经涂覆有诸如硅，二氧化硅，氧化铝等保护性非导电材料的铁，羰基铁，钴，镍及其合金的铁磁性颗粒。 将铁磁颗粒涂覆在含有沉积到或扩散到颗粒中的气态组合物的旋转蒸馏器中。 本发明的涂覆颗粒特别适用于掺入用于腐蚀性气氛的RAM涂料组合物中。

公开(公告)号：US06544352B2

公开(公告)日：2003-04-08

申请号：US09870827

申请日：2001-06-01

申请人： Hiroyuki Mitani ,  Takehiro Tsuchida ,  Yuichi Seki ,  Akihiko Kagawa ,  Tetsuya Sawayama ,  Yoshikazu Seki ,  Masaaki Sato

发明人： Hiroyuki Mitani ,  Takehiro Tsuchida ,  Yuichi Seki ,  Akihiko Kagawa ,  Tetsuya Sawayama ,  Yoshikazu Seki ,  Masaaki Sato

IPC分类号： H01F124

CPC分类号： H01F1/24 ,  H01F41/0246

摘要： Disclosed is a method for the compaction of a soft magnetic powder capable of manufacturing a green compact which has attained high density and high strength, is excellent in mechanical properties and magnetic properties, and does not cause a reduction in electrical resistance. Soft magnetic powder particles individually surface-coated with an insulating vitreous layer containing P, Mg, B, and Fe as essential components are used, and a lubricant is applied to the inner wall surface of a compaction die. The soft magnetic powder is subjected to compaction at from not less than room temperature to less than 50° C. without mixing the lubricant with the soft magnetic powder, followed by annealing at from 50 to 300° C.

摘要翻译： 公开了一种能够制造具有高密度和高强度的生坯的软磁性粉末的压实方法，机械性能和磁特性优异，并且不会导致电阻降低。 使用以P，Mg，B，Fe作为必要成分单独表面涂覆有绝缘玻璃质层的软磁性粉末颗粒，并将润滑剂施加到压实模具的内壁表面。 将软磁性粉末在不低于室温至低于50℃下进行压实，而不将润滑剂与软磁性粉末混合，然后在50至300℃退火。

公开(公告)号：US06368423B1

公开(公告)日：2002-04-09

申请号：US09657064

申请日：2000-09-07

申请人： Isamu Otsuka ,  Toru Kawai ,  Atsunobu Shintani ,  Hiroshi Yamamoto ,  Isao Endo

发明人： Isamu Otsuka ,  Toru Kawai ,  Atsunobu Shintani ,  Hiroshi Yamamoto ,  Isao Endo

IPC分类号： H01F124

CPC分类号： H01F1/15375 ,  C22C32/0089 ,  H01F1/15366

摘要： The invention improves the thermal conductivity of the material powder to be fired and also makes it possible to produce an amorphous magnetically soft body within a shortened period of time. The amorphous magnetically soft body is produced by preforming the material powder into a body first, and heating the preformed body without pressing. Stated more specifically, an amorphous magnetically soft body is produced from a material powder comprising a powder of an amorphous magnetically soft alloy, a glass having a softening point lower than the crystallization starting temperature of the alloy and a binding resin, by pressing the material powder in a preforming die to prepare a preformed body by the binding property of the resin, and firing the preformed body without pressing at a temperature higher than the softening point of the glass and lower than the crystallization starting temperature of the alloy to join the particles of the alloy with the glass.

摘要翻译： 本发明提高了要被烧制的材料粉末的导热性，并且还使得可以在缩短的时间内产生无定形的磁性软体。 无定形磁性软体通过首先将材料粉末预成型为坯体，并且不加压而加热预成型体而制造。 更具体地说，非晶磁性软体由包括非晶磁性软合金粉末，比软化点低于合金结晶起始温度的玻璃和粘合树脂的材料粉末制成，通过将材料粉末 在预成型模具中，通过树脂的粘合特性制备预成形体，在不高于玻璃的软化点的温度下压制预成型体，低于合金的结晶起始温度， 与玻璃的合金。