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公开(公告)号:US06296791B1
公开(公告)日:2001-10-02
申请号:US09541985
申请日:2000-04-03
申请人: Osamu Kobayashi , Osamu Yamada , Koji Honda , Shunji Kawasaki
发明人: Osamu Kobayashi , Osamu Yamada , Koji Honda , Shunji Kawasaki
IPC分类号: C04B3538
CPC分类号: C04B35/265 , C04B35/2658
摘要: A process for producing Mn—Zn ferrite is disclosed, which enables regeneration and reuse of scraps of a sintered product. The process comprises reusing a powder obtained by milling the sintered product of Mn—Zn ferrite, subjecting the powder to a component adjustment so as to have a composition of 44.0 to 50.0 mol % of Fe2O3, 4.0 to 26.5 mol % of ZnO, 0.1 to 8.0 mol % of at least one member selected from the group consisting of TiO2 and SnO2, and the remainder being MnO, and optionally 0.1 to 16.0 mol % of CuO, pressing the resulting mixed powder after the component adjustment, and then sintered a green compact.
摘要翻译: 公开了一种生产Mn-Zn铁氧体的方法,其可以使烧结产品的废料再生和再利用。 该方法包括重新使用通过研磨Mn-Zn铁氧体的烧结体得到的粉末,使粉末成分调整成组成为Fe2O3为44.0〜50.0摩尔%,ZnO为4.0〜26.5摩尔%,0.1〜 8.0mol%的选自TiO 2和SnO 2中的至少一种,剩余部分为MnO,以及任选的0.1至16.0mol%的CuO,在组分调节之后压制所得到的混合粉末,然后烧结生坯 。
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公开(公告)号:US06403017B1
公开(公告)日:2002-06-11
申请号:US09442389
申请日:1999-11-18
申请人: Osamu Kobayashi , Osamu Yamada , Koji Honda , Shunji Kawasaki
发明人: Osamu Kobayashi , Osamu Yamada , Koji Honda , Shunji Kawasaki
IPC分类号: C04B3538
CPC分类号: H01F1/344 , C01G49/009 , C04B35/265 , C04B35/2658
摘要: A process for producing Mn—Zn ferrite having large electrical resistance and being durable to the use in high frequency region exceeding 1 MHz easily and at low cost is disclosed. The process comprises pressing a mixed powder comprising a composition of 44.0 to 50.0 mol % of Fe2O3, 4.0 to 26.5 mol % of ZnO, 0.1 to 8.0 mol % of at least one member selected from the group consisting of TiO2 and SnO2, and the remainder being MnO, and if desired 0.1 to 16.0 mol % of CuO, sintering the resulting green compact in the air or an atmosphere containing an appropriate amount of oxygen, and then cooling the green compact, thereby securing the estimated high initial permeability even in a high frequency region of 1 MHz or more.
摘要翻译: 公开了一种用于制造具有大电阻并且耐用于在容易且低成本地超过1MHz的高频区域中的Mn-Zn铁氧体的方法。 该方法包括将包含Fe2O3为44.0〜50.0摩尔%,ZnO为4.0〜26.5摩尔%,0.1〜8.0摩尔%的选自TiO 2和SnO 2中的至少一种的组成的混合粉末,其余为 为MnO,如果需要,为0.1〜16.0mol%的CuO,在空气或含有适量氧气的气氛中烧结得到的生坯,然后冷却生坯,从而确定了估计的高初始渗透率即使在高 频率区域为1MHz以上。
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公开(公告)号:US06210598B1
公开(公告)日:2001-04-03
申请号:US09374760
申请日:1999-08-16
申请人: Osamu Kobayashi , Koji Honda , Shunji Kawasaki
发明人: Osamu Kobayashi , Koji Honda , Shunji Kawasaki
IPC分类号: C01G4700
CPC分类号: H01F1/344 , C04B35/2658
摘要: A Mn—Zn ferrite having large electrical resistance, which can withstand use in high frequency region exceeding 1 MHz, is provided. The Mn—Zn ferrite comprises the following basic components: 44.0 to 50.0 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % at least one member selected from the group consisting of TiO2 and SnO2, and the remainder being MnO. By the addition of TiO2 and SnO2, even if the material is sintered in air, electrical resistance of 103 times that of the conventional Mn—Zn ferrite can be obtained, and high initial permeability of 300 to 400 as estimated can be secured even at high frequency of 5 MHz.
摘要翻译: 提供了具有大电阻的Mn-Zn铁氧体,其能够经受在超过1MHz的高频区域中的使用。 Mn-Zn铁氧体包含以下基本成分:44.0〜50.0mol%Fe 2 O 3,4.0〜26.5mol%ZnO,0.1〜8.0mol%选自TiO 2和SnO 2中的至少一种,余量为MnO。 通过添加TiO 2和SnO 2,即使在空气中烧结材料,也可以获得与传统的Mn-Zn铁氧体相当的103倍的电阻,即使在高的情况下也可以确保高达300〜400的初始磁导率 频率为5 MHz。
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公开(公告)号:US06180022B2
公开(公告)日:2001-01-30
申请号:US09374759
申请日:1999-08-16
申请人: Osamu Kobayashi , Koji Honda , Shunji Kawasaki
发明人: Osamu Kobayashi , Koji Honda , Shunji Kawasaki
IPC分类号: C04B3538
CPC分类号: C04B35/265 , C04B35/2658 , H01F1/344
摘要: A Mn—Zn ferrite having large electrical resistance, which can withstand the use in high frequency region exceeding 1 MHz, is provided. The Mn—Zn ferrite comprises the following basic components: 44.0 to 50.0 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 8.0 mol % at least one member selected from the group consisting of TiO2 and SnO2, 0.1 to 16.0 mol % CuO, and the remainder being MnO. By the addition of TiO2, SnO2 and CuO, even if the material is sintered in the air, electrical resistance of 103 times or more as high as that of the conventional Mn—Zn ferrite can be obtained, and a high initial permeability of 300-400 as estimated can be secured even at high frequency of 5 MHz.
摘要翻译: 提供了具有大电阻的Mn-Zn铁氧体,可以承受超过1MHz的高频区域的使用。 Mn-Zn铁氧体包含以下基本成分:44.0〜50.0mol%Fe 2 O 3,4.0〜26.5mol%ZnO,0.1〜8.0mol%选自TiO 2和SnO 2中的至少一种,0.1〜16.0mol%CuO ,其余为MnO。 通过添加TiO 2,SnO 2和CuO,即使在空气中烧结材料,也可以获得与现有的Mn-Zn铁氧体相当的高达103倍以上的电阻, 即使在5MHz的高频下也可以确保估计的400。
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公开(公告)号:US06576169B2
公开(公告)日:2003-06-10
申请号:US09989496
申请日:2001-11-21
申请人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
发明人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
IPC分类号: B29B1700
CPC分类号: C01G49/009 , C01G49/0072 , C01P2004/61 , C04B35/2658
摘要: A production process of a Mn—Zn ferrite enables wastes of sintered cores to be recycled without serious difficulties in sintering. The production process includes recycling a powder obtained by milling a sintered Mn—Zn ferrite, thereby obtaining a sintered core having a component composition including 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.02 to 1.00 mol % Mn2O3 and a remainder MnO.
摘要翻译: Mn-Zn铁氧体的制造方法能够使烧结芯的废料再循环,而不会造成烧结的严重困难。 制造方法包括将通过研磨Mn-Zn系铁氧体烧结得到的粉末进行再循环,得到具有44.0〜49.8摩尔%Fe 2 O 3,4.0〜26.5摩尔%ZnO,0.02〜1.00摩尔%Mn 2 O 3的组分组成的烧结芯,其余部分 MnO。
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公开(公告)号:US06984338B2
公开(公告)日:2006-01-10
申请号:US10765057
申请日:2004-01-28
申请人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
发明人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
CPC分类号: H01F1/344 , C04B35/2658 , C04B2235/3208 , C04B2235/3239 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3262 , C04B2235/3281 , C04B2235/3284 , C04B2235/3418 , C04B2235/6584 , C04B2235/79 , C04B2235/83 , C04B2235/94 , C04B2235/96
摘要: An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50.0 mol % Fe2O3 and a limited amount (0.8 mol % or less) of Mn2O3, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained thereby realizing an excellent soft magnetism in a high frequency band such as 1 MHz.
摘要翻译: Mn-Zn铁氧体包括44.0至49.8mol%的Fe 2 O 3 3,4.0至26.5mol%的ZnO,0.8mol%或更少的Mn 2的基础组分 其余为MnO,余量由0.20(0.20)除外)添加至1.00质量%的CaO作为添加剂。 由于Mn-Zn铁氧体含有少于50.0摩尔%的Fe 2 O 3 O 3和Mn 2 O 3的有限量(0.8摩尔%以下) > O 3时,即使CaO含量大于0.20质量%,也不会发生异常的晶粒生长,并且可以获得高的电阻,从而在高频带中实现优异的软磁性,例如 1 MHz。
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公开(公告)号:US06984337B2
公开(公告)日:2006-01-10
申请号:US10765050
申请日:2004-01-28
申请人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
发明人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
CPC分类号: C04B35/2658 , C04B35/63 , C04B2235/3208 , C04B2235/3232 , C04B2235/3239 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3262 , C04B2235/3281 , C04B2235/3284 , C04B2235/3293 , C04B2235/3418 , C04B2235/604 , C04B2235/6584 , C04B2235/83 , C04B2235/94 , C04B2235/96 , H01F1/344
摘要: An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, at least one of 0.1 to 4.0 mol % TiO2 and SnO2, 0.5 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50 mol % Fe2O3 and a limited amount (0.5 mol % or less) of Mn2O3, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained. And, since an appropriate amount of TiO2 and/or SnO2 is contained, an initial permeability is kept adequately high, whereby an excellent soft magnetism can be achieved in a high frequency band such as 1 MHz.
摘要翻译: Mn-Zn铁氧体包括44.0至49.8mol%的Fe 2 O 3 3,4.0至26.5mol%的ZnO,0.1至4.0mol%的TiO 2中的至少一种的基础组分 2%,和SnO 2,0.5mol%或更少的Mn 2 O 3 3,其余由MnO, 含有0.20质量%CaO作为添加剂。 由于Mn-Zn铁氧体含有少于50摩尔%的Fe 2 O 3 O 3和少量(0.5摩尔%以下)的Mn 2 O 3 即使CaO含量大于0.20质量%,也不会发生异常的晶粒生长,可以获得高的电阻。 并且,由于含有适当量的TiO 2和/或SnO 2 N,所以初始磁导率保持足够高,从而可以获得高的软磁性 频段如1 MHz。
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公开(公告)号:US20050162234A1
公开(公告)日:2005-07-28
申请号:US10511308
申请日:2003-09-22
申请人: Osamu Kobayashi , Osamu Yamada , Yukio Suzuki , Kiyoshi Ito , Mayuka Shirai
发明人: Osamu Kobayashi , Osamu Yamada , Yukio Suzuki , Kiyoshi Ito , Mayuka Shirai
CPC分类号: C04B35/2625 , C04B35/265 , C04B35/2658 , C04B35/6262 , C04B2235/3232 , C04B2235/3262 , C04B2235/3267 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3293 , C04B2235/5436 , C04B2235/96 , H01F1/344 , H01F17/06 , H01F2017/065
摘要: A signal discriminator is provided which leverages variation of permittivity of Mn—Zn-based ferrite. The signal discriminator comprises a soft magnetic material which has a capacitive reactance C, and which has its complex relative permittivity varying with frequency such that the real part ε′ of the complex relative permittivity is large in a low frequency domain and small in a high frequency domain. In the reactance component X2, the capacitive reactance C is not negligible with respect to the inductive reactance L in a low frequency domain, in consequence of which the value of the reactance component X2 as a parallel circuit of the capacitive reactance C and the inductive reactance L is caused to decrease, and the influence of the capacitive reactance C is decreased in a high frequency domain. Consequently, the reactance component X2 decreases more than the reactance component X1 of a conventional soft magnetic material, and the X-R cross-point frequency moves to a frequency lower than a conventional X-R cross-point frequency XR1, whereby noises in a frequency band where noise components exist are converted into thermal energy thus reducing the waveform distortion originating from high frequency noises.
摘要翻译: 提供了一种利用Mn-Zn基铁素体的介电常数变化的信号鉴别器。 信号鉴别器包括具有电容电抗C的软磁材料,其复相对电容率随频率而变化,使得复相对介电常数的实部ε在低频域中较大,而在高频下小 域。 在电抗分量X 2中,电容电抗C相对于低频域中的感抗L是不可忽略的,结果是电容电抗C和电容电抗C的并联电路的电抗分量X 2的值 导致电感L降低,并且电容电抗C的影响在高频域中降低。 因此,电抗分量X 2比常规软磁材料的电抗分量X 1降低,并且XR交叉点频率移动到低于常规XR交叉点频率XR 1的频率,从而频率上的噪声 噪声分量存在的频带被转换成热能,从而减少由高频噪声引起的波形失真。
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公开(公告)号:US06436308B2
公开(公告)日:2002-08-20
申请号:US09769296
申请日:2001-01-26
申请人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
发明人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
IPC分类号: B22F100
CPC分类号: H01F1/344 , C04B35/265 , C04B35/2658
摘要: The present invention provides a Mn—Zn ferrite having an electrical resistivity exceeding 1 &OHgr;m order and having a high initial permeability of 4000 or more at 100 kHz and 100 or more at 10 MHz. The main components of the Mn—Zn ferrite include 44.0 to 49.8 mol % Fe2O3, 15.0 to 26.5 mol % ZnO, 0.1 to 3.0 mol % CoO, 0.02 to 1.00 mol % Mn2O3, and the remainder MnO. The Mn—Zn ferrite can be used in a wide frequency region of 100 kHz to 10 MHz by limiting Fe2O3 content to a range of less than 50 mol %, that is the stoichiometric composition, inhibiting formation of Mn2O3 and adding a proper amount of CoO.
摘要翻译: 本发明提供一种Mn-Zn铁氧体,其电阻率超过1欧姆等级,并且在100kHz时具有4000或更高的初始磁导率,在10MHz时具有100或更高的初始磁导率。 Mn-Zn铁氧体的主要成分包括44.0〜49.8mol%的Fe2O3,15.0〜26.5mol%的ZnO,0.1〜3.0mol%的CoO,0.02〜1.00mol%的Mn2O3,余下的是MnO。 通过将Fe 2 O 3含量限制在小于50mol%,即化学计量组成的范围内,Mn-Zn铁氧体可以在100kHz至10MHz的宽频率区域中使用,抑制Mn 2 O 3的形成并添加适量的CoO 。
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公开(公告)号:US06468441B1
公开(公告)日:2002-10-22
申请号:US09795133
申请日:2001-03-01
申请人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
发明人: Osamu Kobayashi , Osamu Yamada , Kiyoshi Ito
IPC分类号: C04B3526
CPC分类号: C04B35/2658 , C04B35/265
摘要: The present invention provides a Mn—Zn ferrite having an electrical resistivity exceeding 1 &OHgr;m order and a low core loss in a high frequency region exceeding 1 MHz. A basic component composition of the Mn—Zn ferrite includes 44.0 to 49.8 mol % of Fe2O3, 6.0 to 15.0 mol % of ZnO (15.0 mol % is excluded), 0.1 to 3.0 mol % of CoO, 0.02 to 1.20 mol % of Mn2O3, and the remainder of MnO. The Mn—Zn ferrite achieves desired purposes by controlling Fe2O3 content to a range less than 50 mol % that is the stoichiometric composition, adding a proper amount of CoO, restraining amount of Mn2O3 formation to 1.20 mol % or less, and further setting their average grain sizes to less than 10 &mgr;m.
摘要翻译: 本发明提供一种电阻率超过1欧姆等级的Mn-Zn铁氧体,超高于1MHz的高频区域的低铁损。 Mn-Zn铁氧体的基本成分组成包括Fe2O3为44.0〜49.8mol%,ZnO为6.0〜15.0mol%(不包括15.0mol%),CoO为0.1〜3.0mol%,Mn2O3为0.02〜1.20mol% 和剩余的MnO。 Mn-Zn铁氧体通过将Fe 2 O 3含量控制在化学计量组成小于50摩尔%的范围内,添加适量的CoO,抑制Mn2O3的形成量为1.20摩尔%以下,进一步设定其平均值 粒径小于10um。
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