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    • 24. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06780503B2
    • 2004-08-24
    • US10281947
    • 2002-10-29
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • G11B5702
    • G11B5/7021G11B5/7023G11B5/70678G11B5/7085G11B5/714Y10T428/256Y10T428/31609
    • A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 &mgr;m in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.
    • 一种磁记录介质,包括:非磁性载体; 以及包含铁磁性六角铁氧体粉末和粘合剂的至少一个磁性层,其中所述磁性层包含平均粒度为0.03-0.5μm,相对于铁磁性六角铁氧体粉末为0.1-5wt%的金刚石颗粒, 所述铁氧体六角铁氧体粉末的平均片状直径为5〜40nm,所述粘合剂为以下中的至少一种:(i)包含0.2〜0.7meq / g的至少一种选自-SO 3 M, OSO3M,-PO(OM)2,-OPO(OM)2和-COOM,其中M表示氢原子,碱金属或铵,和(ii)包含0.5-5meq / g至少一种 选自-CONR1R2,-NR1R2和-N + R1R2R3的极性基团,其中R1,R2和R3各自独立地表示氢原子或烷基。
    • 25. 发明授权
    • Method for producing magnetic recording medium and magnetic recording medium
    • 磁记录介质和磁记录介质的制造方法
    • US06677036B2
    • 2004-01-13
    • US10281996
    • 2002-10-29
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • Hitoshi NoguchiNobuo YamazakiShinji Saito
    • B05D512
    • G11B5/70678G11B5/7021G11B5/7023Y10S428/90
    • A method for producing a magnetic recording medium comprising: dispersing at least a binder and a ferromagnetic hexagonal ferrite powder to prepare a magnetic coating; and applying the magnetic coating to provide at least one magnetic layer, wherein the binder is at least one of: (a) a binder comprising 0.2 to 0.7 meq/g of at least one polar group selected from —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2 and —COOM wherein M represents a hydrogen atom, an alkali metal or ammonium; and (b) a binder comprising 0.5 to 5 meq/g of at least one polar group selected from —CONR1R2, —NR1R2 and —N+R1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group, and the ferromagnetic hexagonal ferrite powder has an average tabular diameter of from 10 to 40 nm and a water content of from 0.3 to 3% by weight.
    • 一种制造磁记录介质的方法,包括:分散至少一种粘结剂和一种铁磁性六角铁氧体粉末以制备磁性涂层; 以及施加所述磁性涂层以提供至少一个磁性层,其中所述粘合剂是以下至少一种:(a)包含0.2至0.7meq / g的至少一种选自-SO 3 M,-OSO 3 M,-PO (OM)2,-OPO(OM)2和-COOM,其中M表示氢原子,碱金属或铵; 和(b)包含0.5-5meq / g至少一种选自-CONR1R2,-NR1R2和-N + R1R2R3的极性基团的粘合剂,其中R1,R2和R3各自独立地表示氢原子或烷基, 铁磁六方铁氧体粉末的平均片状直径为10〜40nm,水含量为0.3〜3重量%。
    • 27. 发明授权
    • Integrating component measuring device
    • 集成元件测量装置
    • US3947760A
    • 1976-03-30
    • US538496
    • 1975-01-03
    • Hitoshi NoguchiKohichi MaedaTakeshi Kyo
    • Hitoshi NoguchiKohichi MaedaTakeshi Kyo
    • G01R27/02H03M1/00G01R27/00
    • G01R27/02H03M1/52
    • A method and means for measuring the electric properties of capacitor, inductor and resistor elements is described. The element to be measured and a reference element are connected in series, and standard A.C. voltage is applied to one end of the series circuit whereas a variable voltage is applied to the other end of said circuit. The variable voltage is controlled in order to zero the voltage or the current at the common junction of both the element to be measured and the reference element. Said standard voltage and said variable voltage are rectified, and the generated D.C. signals are used for charging integrator capacitors. These capacitors are then discharged and the ratio of charging and discharging time is a measure of the resistance, capacitance and inductance, respectively, of the unknown element. Dielectric and magnetic dissipation factors may be measured in a similar manner.
    • 描述了用于测量电容器,电感器和电阻器元件的电特性的方法和装置。 要测量的元件和参考元件串联连接,并且将标准交流电压施加到串联电路的一端,而可变电压被施加到所述电路的另一端。 控制可变电压以便将要测量的元件和参考元件的公共接点处的电压或电流归零。 所述标准电压和所述可变电压被整流,所产生的直流信号用于对积分电容器进行充电。 然后,这些电容器被放电,并且充电和放电时间的比率分别是未知元件的电阻,电容和电感的量度。 可以以类似的方式测量电介质和磁损耗因子。