公开(公告)号：US20070181847A1

公开(公告)日：2007-08-09

申请号：US11671479

申请日：2007-02-06

申请人： Tomofumi Kuroda ,  Isao Nakahata ,  Masahiko Watanabe ,  Masahito Furukawa ,  Osamu Hasegawa ,  Takuya Aoki

发明人： Tomofumi Kuroda ,  Isao Nakahata ,  Masahiko Watanabe ,  Masahito Furukawa ,  Osamu Hasegawa ,  Takuya Aoki

IPC分类号： H01F1/00 ,  C04B35/26

CPC分类号： H01F1/36 ,  C04B35/2658 ,  C04B2235/3203 ,  C04B2235/3208 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3284 ,  C04B2235/3418 ,  C04B2235/6584 ,  H01F1/22

摘要： It is an object to provide a ferrite material which has a higher saturation magnetic flux density and low core loss, both at 100° C. The ferrite material is composed of a sintered body containing Fe, Mn and Zn as main constituents at x, y and z % by mol in terms of Fe2O3, MnO and ZnO, respectively, and containing Li as an additive at v % by weight in terms of Li2CO3 based on the main constituents, wherein x=55.7 to 60, z=3 to 8.5, y=100−x−z, v=0.3 to 0.8, and x1≦x≦x2 (x1=52.9−0.1z+8.5v and x2=54.4−0.1z+8.5v).

摘要翻译： 本发明的目的是提供在100℃下具有较高的饱和磁通密度和较低铁损的铁氧体材料。铁氧体材料由以x，y为主要成分的以Fe，Mn和Zn为主要成分的烧结体构成 以Fe 2 O 3 O 3，MnO和ZnO为基准分别为z摩尔％，Li为添加剂，以重量％计，Li为添加剂。 基于主要成分，其中x = 55.7至60，z = 3至8.5，y = 100-xz，v = 0.3至0.8，x1 <= x <= x2（x1 = 52.9-0.1z + 8.5v和x2 = 54.4-0.1z + 8.5v）。

公开(公告)号：US07713465B2

公开(公告)日：2010-05-11

申请号：US12053082

申请日：2008-03-21

申请人： Shenglei Che ,  Kentaro Mori ,  Masahiko Watanabe ,  Takuya Aoki ,  Tomofumi Kuroda

发明人： Shenglei Che ,  Kentaro Mori ,  Masahiko Watanabe ,  Takuya Aoki ,  Tomofumi Kuroda

IPC分类号： C04B33/32

CPC分类号： H01F1/344 ,  C01G49/0018 ,  C01G49/009 ,  C01G53/006 ,  C01P2002/52 ,  C01P2006/80 ,  C04B35/265 ,  C04B35/6262 ,  C04B35/62695 ,  C04B2235/3203 ,  C04B2235/3208 ,  C04B2235/3239 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/5427 ,  C04B2235/656 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6584

摘要： Provided is a process for producing a MnZn-base ferrite comprising: firing a compacted raw material to produce the MnZn-base ferrite, wherein the firing comprises, in the following order: a heating phase comprising gradually bringing a firing temperature from room temperature up to a maximum temperature; a maximum temperature holding phase comprising maintaining the maximum temperature for a period of time, wherein a partial pressure of oxygen (p2) at the maximum temperature holding phase is greater than an equilibrium partial pressure of oxygen (p1) as follows: p2>p1, wherein the equilibrium partial pressure of oxygen (p1) is represented by the following equation: log(p1)=log(PO2)=a−b/T, wherein PO2 is measured in a unit of %, and T is measured in a unit of absolute temperature K; and a cooling phase comprising gradually bringing the maximum temperature down to near room temperature, wherein a partial pressure of oxygen (p3) at the cooling phase is operated at an equilibrium partial pressure of oxygen based on the equation log(p3)=a−b/T.

摘要翻译： 提供了一种MnZn基铁素体的制造方法，其特征在于，包括：烧结压实的原料以制造所述MnZn基铁氧体，其中所述烧制按以下顺序包括：加热阶段，包括逐渐使焙烧温度从室温升至 最高温度; 最大温度保持阶段包括将最高温度保持一段时间，其中在最高温度保持阶段的氧分压（p2）大于氧的平衡分压（p1），如下：p2> p1， 其中氧的平衡分压（p1）由以下等式表示：log（p1）= log（PO2）= a-b / T，其中PO2以％为单位测量，T以单位测量 绝对温度K; 和冷却阶段，其包括使最高温度逐渐降至接近室温，其中在冷却阶段的氧（p3）分压基于等式log（p3）= a-b在氧的平衡分压下操作 / T。

公开(公告)号：US08252124B2

公开(公告)日：2012-08-28

申请号：US13046307

申请日：2011-03-11

申请人： Masahito Koeda ,  Tomofumi Kuroda ,  Tomokazu Ishikura ,  Akihiro Harada ,  Hiroyuki Ono ,  Osamu Kido ,  Satoko Ueda

发明人： Masahito Koeda ,  Tomofumi Kuroda ,  Tomokazu Ishikura ,  Akihiro Harada ,  Hiroyuki Ono ,  Osamu Kido ,  Satoko Ueda

IPC分类号： H01F1/147 ,  H01F1/22

CPC分类号： H01F3/08 ,  B22F1/0003 ,  B22F2301/35 ,  B22F2303/01 ,  B22F2304/10 ,  H01F1/26 ,  H01F41/0246

摘要： The present invention provides a powder magnetic core low in the loss and high in the saturation magnetic flux density and a method for manufacturing the same. More specifically, the present invention provides a powder magnetic core that comprises a soft magnetic metal powder having an average particle size (D50) of 0.5 to 5 μm, a half width of diffraction peak in a direction of α-Fe as measured by X-ray powder diffraction of 0.2 to 5.0°, and an Fe content of 97.0% by mass or more, the core having an oxygen content of 2.0% by mass or more.

摘要翻译： 本发明提供一种低损耗，高饱和磁通密度的粉末磁芯及其制造方法。 更具体地，本发明提供一种粉末磁芯，其包含平均粒径（D50）为0.5〜5μm的软磁性金属粉末，测定的α-Fe的<110℃方向的衍射峰的半值宽度 核的氧含量为2.0质量％以上，X射线粉末衍射为0.2〜5.0°，Fe含量为97.0质量％以上。

公开(公告)号：US06402979B1

公开(公告)日：2002-06-11

申请号：US09628280

申请日：2000-07-28

申请人： Hitoshi Saita ,  Tomofumi Kuroda ,  Naoyoshi Sato

发明人： Hitoshi Saita ,  Tomofumi Kuroda ,  Naoyoshi Sato

IPC分类号： C04B3526

CPC分类号： H01F1/344 ,  C04B35/2658

摘要： There is disclosed a magnetic ferrite material obtained by calcining a raw material, forming a calcined powder into a desired shape and sintering to contain Fe2O3, MnO and ZnO as main components, the magnetic ferrite material with a low power loss is realized by setting the coefficient of variation (CV value) of the content of a Ca component precipitated along a grain boundary in a range of 1 to 60%, and the magnetic ferrite material is manufactured by calcining the raw material containing Fe2O3, MnO and ZnO as the main components to obtain the calcined powder in which that the S component content is in a range of 1 to 200 ppm, and forming the calcined powder into the desired shape and sintering.

摘要翻译： 公开了通过煅烧原料获得的磁性铁氧体材料，将煅烧粉末形成所需形状并烧结以含有Fe 2 O 3，MnO和ZnO作为主要成分，通过设定系数来实现低功率损耗的磁性铁氧体材料 通过沿着晶界析出的Ca成分含量在1〜60％范围内的变化量（CV值），通过将含有Fe 2 O 3，MnO和ZnO的原料作为主要成分进行煅烧来制造磁性铁氧体材料， 得到S成分含量为1〜200ppm的煅烧粉末，将煅烧粉末形成所需形状并进行烧结。

公开(公告)号：US09424968B2

公开(公告)日：2016-08-23

申请号：US13351722

申请日：2012-01-17

申请人： Tomokazu Ishikura ,  Michihiro Muramoto ,  Akihiro Harada ,  Katsumi Kawasaki ,  Tomofumi Kuroda

发明人： Tomokazu Ishikura ,  Michihiro Muramoto ,  Akihiro Harada ,  Katsumi Kawasaki ,  Tomofumi Kuroda

IPC分类号： H01Q13/00 ,  C04B35/00 ,  B05D5/12 ,  H01F1/10 ,  H01Q1/24 ,  H01Q1/36 ,  H01Q5/00 ,  H01Q9/42 ,  C04B35/26 ,  C04B35/626 ,  C04B38/00 ,  C04B111/00

CPC分类号： H01F1/10 ,  C04B35/2633 ,  C04B35/2641 ,  C04B35/2683 ,  C04B35/62685 ,  C04B38/00 ,  C04B2111/00844 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3263 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/3293 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/767 ,  C04B2235/786 ,  H01Q1/243 ,  H01Q1/364 ,  H01Q5/00 ,  H01Q9/42 ,  C04B35/26

摘要： A magnetic material for antennas including: an M-type hexagonal ferrite represented by the following general formula (1) as a main phase, MA.Fe12-x.MBx.O19 (wherein MA is at least one kind selected from the group consisting of Sr and Ba, MB is MC or MD, MC is at least one kind selected from the group consisting of Al, Cr, Sc and In, MD is an equivalent mixture of at least one kind selected from the group consisting of Ti, Sn and Zr and at least one kind selected from the group consisting of Ni, Zn, Mn, Mg, Cu and Co, X is a number from 1 to 5), and an average crystal particle diameter is equal to or greater than 5 μm.

摘要翻译： 一种用于天线的磁性材料，包括：作为主相的由以下通式（1）表示的M型六方晶系铁氧体：MA.Fe12-x.MBx.O19（其中MA是选自以下的至少一种： Sr和Ba，MB是MC或MD，MC是选自Al，Cr，Sc和In中的至少一种，MD是选自Ti，Sn和 Zr和选自Ni，Zn，Mn，Mg，Cu和Co中的至少一种，X为1至5的数），平均晶体粒径等于或大于5μm。

公开(公告)号：US6077453A

公开(公告)日：2000-06-20

申请号：US231763

申请日：1999-01-15

申请人： Hitoshi Saita ,  Tomofumi Kuroda ,  Shigeo Okamoto ,  Naoyoshi Sato

发明人： Hitoshi Saita ,  Tomofumi Kuroda ,  Shigeo Okamoto ,  Naoyoshi Sato

IPC分类号： C01G49/00 ,  C04B35/26 ,  C04B35/38 ,  H01F1/34 ,  H01F27/255 ,  C04D35/26

CPC分类号： C04B35/2658 ,  H01F1/344 ,  H01F27/255 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3275 ,  C04B2235/3277 ,  C04B2235/3284 ,  C04B2235/3293 ,  C04B2235/3418 ,  C04B2235/604

摘要： Provided are an Mn--Zn ferrite in which the core loss is low and Bs is high at high temperatures; a transformer capable of being small-sized and suitable to use at high temperatures; and a method for efficiently driving the transformer. Also provided is a transformer capable of being small-sized and suitable to use in a broad temperature range including high temperatures. Further provided are a high-efficiency transformer capable of being small-sized, in which the core loss in the ferrite core is low and the saturation magnetic flux density is high therein at the temperature at which the transformer is driven; and a high-efficiency driving method for the transformer. Depending on its use, Mn--Zn ferrite to be the ferrite core for the transformers comprises, as the essential components, specific amounts of Fe.sub.2 O.sub.3, ZnO and MnO, and, as the side components, specific amounts of SiO.sub.2, CaCO.sub.3, Nb.sub.2 O.sub.5 and ZrO.sub.2. The core of the transformers is made of the Mn--Zn ferrite.

摘要翻译： 提供一种其中铁损低低并且Bs在高温下高的Mn-Zn铁氧体; 能够小型化并适用于高温使用的变压器; 以及有效地驱动变压器的方法。 还提供了能够小型化并且适合在包括高温的宽温度范围内使用的变压器。 还提供了一种能够在变压器驱动的温度下铁氧体磁芯的磁芯损耗低和饱和磁通密度高的小型高效变压器， 和变压器的高效率驱动方法。 根据其用途，用作变压器的铁氧体磁心的Mn-Zn铁氧体作为必要成分，含有Fe 2 O 3，ZnO，MnO的特定量，作为侧面成分，可以使用特定量的SiO 2，CaCO 3，Nb 2 O 5，ZrO 2 。 变压器的核心由Mn-Zn铁氧体制成。