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    • 4. 发明授权
    • Oxide magnetic material
    • 氧化物磁性材料
    • US5518642A
    • 1996-05-21
    • US314546
    • 1994-09-28
    • Osamu InoueNobuya MatsutaniKoichi KugimiyaOsamu IshiiYasuyuki Aono
    • Osamu InoueNobuya MatsutaniKoichi KugimiyaOsamu IshiiYasuyuki Aono
    • C04B35/26C04B35/38
    • C04B35/2658
    • An oxide magnetic material provided by the present invention contains, as main components, 55 to 59 mol % of Fe.sub.2 O.sub.3 ; 35 to 42 mol % of MnO; and 6 mol % or less of ZnO, and further contains, as sub-components, 0.05 to 0.3 wt % of CaO; and 0.005 to 0.05 wt % of SiO.sub.2. The other oxide magnetic material provided by the present invention contains, as main components, 61 to 67 mol % of Fe.sub.2 O.sub.3 ; 3 to 36 mol % of MnO; and 30 mol % or less of ZnO, and further contains, as sub-components, 0.05 to 0.5 wt % of CaO; and 0.005 to 0.2 wt % of SiO.sub.2. Such materials can further contain one or more kinds of oxides selected from the group consisting of ZrO.sub.2, HfO.sub.2, Ta.sub.2 O.sub.5, Cr.sub.2 O.sub.3, MoO.sub.3, WO.sub.3, Al.sub.2 O.sub.3, Ga.sub.2 O.sub.3, In.sub.2 O.sub.3, GeO.sub.2, SnO.sub.2, Sb.sub.2 O.sub.3 and Bi.sub.2 O.sub.3. Such magnetic materials of the present invention have the advantages of having an extremely low magnetic loss even when used in the high frequency band and having a minimum magnetic loss at a temperature sufficiently higher than room temperature. Moreover, a switching power supply having a switching frequency of 300 kHz to 5 MHz is provided by using such magnetic materials as a magnetic core.
    • 本发明提供的氧化物磁性材料含有55〜59摩尔%的Fe 2 O 3作为主要成分; 35〜42mol%的MnO; 和6mol%以下的ZnO,作为副成分,进一步含有0.05〜0.3重量%的CaO; 和0.005〜0.05重量%的SiO 2。 本发明提供的其它氧化物磁性材料以Fe 2 O 3为主要成分为61〜67摩尔%。 3〜36摩尔%的MnO; 和30摩尔%以下的ZnO,作为副成分,进一步含有0.05〜0.5重量%的CaO; 和0.005〜0.2重量%的SiO 2。 这些材料可以进一步含有选自ZrO 2,HfO 2,Ta 2 O 5,Cr 2 O 3,MoO 3,WO 3,Al 2 O 3,Ga 2 O 3,In 2 O 3,GeO 2,SnO 2,Sb 2 O 3和Bi 2 O 3中的一种以上的氧化物。 本发明的这种磁性材料具有即使在高频带下使用也具有非常低的磁损耗并且在足够高于室温的温度下具有最小的磁损耗的优点。 此外,通过使用这种磁性材料作为磁芯,提供具有300kHz至5MHz的开关频率的开关电源。
    • 10. 发明授权
    • Dielectric ceramic compositions and dielectric resonators
    • 介电陶瓷组合物和介质谐振器
    • US5470808A
    • 1995-11-28
    • US325083
    • 1994-10-17
    • Kojiro OkuyamaYoichiro YokotaniKoichi Kugimiya
    • Kojiro OkuyamaYoichiro YokotaniKoichi Kugimiya
    • C04B35/49H01B3/12H01P7/10
    • H01B3/12C04B35/49H01P7/10
    • The invention provides a dielectric ceramic including as the main component a complex oxide formed of both Zr and Ti, at least one component selected from the group (A) consisting of {Mg, Co, Zn, Ni and Mn} and at least one component selected from the group (B) consisting of {Nb and Ta} and a TE.sub.01 .delta.-mode dielectric resonator including the dielectric ceramic, and also the invention provides a dielectric ceramic composition expressed by Formula (a):xZrO.sub.2 --yTiO.sub.2 --zA.sub.(1+w)/3 Nb.sub.(2-w)/3 O.sub.2Formula (a)wherein A denotes at least one component selected from the group (A) consisting of {Mg, Co, Zn, Ni and Mn},x, y and z denote molar fractions ranging from 0.10 to 0.60, 0.20 to 0.60 and 0.01 to 0.70, respectively, and have the relation represented by Formula (a):x+y+z=1 Formula (a)and w denotes a value of 0 to 1.50, and a TE.sub.01 .delta.-mode dielectric resonator in which using the dielectric ceramic.
    • 本发明提供一种电介质陶瓷,其包括由Zr和Ti两者形成的复合氧化物作为主要组分,选自{Mg,Co,Zn,Ni和Mn}组成的组(A)中的至少一种和至少一种组分 选自由{Nb和Ta}组成的组(B)和包括电介质陶瓷的TE01δ模式介电共振器,本发明还提供由式(a)表示的介电陶瓷组合物:xZrO 2 -yTiO 2 -ZA(1 + w)/ 3Nb(2-w)/ 3O2(a)其中A表示选自{Mg,Co,Zn,Ni和Mn}组成的组(A)中的至少一种成分,x,y和z表示摩尔 并且具有由式(a)表示的关系:x + y + z = 1式(a),w表示0至1.50的值,并且a TE01 delta模式介质谐振器,其中使用电介质陶瓷。