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155 条记录 (耗时 0.026 秒)

    Carbon combustion synthesis of oxides
    13.
    发明授权
    Carbon combustion synthesis of oxides 有权
    碳燃烧合成氧化物

    公开(公告)号：US07897135B2

    公开(公告)日：2011-03-01

    申请号：US11231450

    申请日：2005-09-21

    申请人： Karen S. Martirosyan ,  Dan Luss

    发明人： Karen S. Martirosyan ,  Dan Luss

    IPC分类号： C01G1/00 ,  C01G9/00 ,  C01G19/00 ,  C01G23/00 ,  C01G49/00 ,  C01G51/00

    CPC分类号： C01G1/02 ,  C01B13/324 ,  C01B33/181 ,  C01B35/1027 ,  C01F17/0025 ,  C01G9/00 ,  C01G19/00 ,  C01G23/006 ,  C01G45/006 ,  C01G45/1264 ,  C01G49/0018 ,  C01G49/0027 ,  C01G49/0036 ,  C01G49/0054 ,  C01G49/009 ,  C01G51/00 ,  C01G53/006 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2002/88 ,  C01P2004/03 ,  C01P2006/42 ,  C09C1/0009

    摘要： The present invention is generally directed to a novel, economic synthesis of oxide ceramic composites. Methods of the present invention, referred to as carbon combustion synthesis of oxides (CCSO), are a modification of self-propagating high-temperature synthesis (SHS) methods in which the heat needed for the synthesis is generated by combustion of carbon in oxygen rather than that of a pure metal. This enables a more economic production of the ceramic material and minimizes the presence of intermediate metal oxides in the product. The reactant mixture generally comprises at least one oxide precursor (e.g., a metal or non metal oxide, or super oxide, or nitride, or carbonate, or chloride, or oxalate, or halides) as a reactant, but no pure metal. Pure carbon in the form of graphite or soot is added to the reactant mixture to generate the desired heat (upon ignition). The mixture is placed in a reactor and exposed to gaseous oxygen. The high-temperature exothermic reaction between the carbon and oxygen generates a self-sustaining reaction in the form of a propagating temperature wave that causes a reaction among the reactants. The reaction proceeds rapidly following ignition, and the final product comprises simple and/or complex oxides of elements present in the oxide precursor(s). CCSO also enables synthesis of oxides that cannot be produced by conventional SHS, such as when the pure metal is pyrophoric (such as Li or La) or such as when it melts at room temperature (e.g., Ga) or such as the combustion heat of the metal is relatively low.

    摘要翻译： 本发明一般涉及氧化物陶瓷复合材料的新型经济合成。 本发明的方法，称为碳燃烧合成氧化物（CCSO），是自蔓延高温合成（SHS）方法的改进，其中合成所需的热量是通过在氧气中燃烧碳而产生的 比纯金属。 这使得能够更经济地生产陶瓷材料并最小化产品中中间体金属氧化物的存在。 反应物混合物通常包含作为反应物的至少一种氧化物前体（例如，金属或非金属氧化物，或超氧化物，或氮化物，或碳酸盐，或氯化物，或草酸盐或卤化物），但不包括纯金属。 将石墨或烟灰形式的纯碳加入到反应混合物中以产生所需的热量（点火时）。 将混合物置于反应器中并暴露于气态氧气中。 碳和氧之间的高温放热反应以引起反应物之间的反应的传播温度波的形式产生自维持反应。 该反应在点燃之后迅速进行，并且最终产物包含存在于氧化物前体中的元素的简单和/或复合氧化物。 CCSO还能够合成不能通过常规SHS生产的氧化物，例如当纯金属是自燃的（例如Li或La）时，或者当其在室温下熔化时（例如Ga）或诸如燃烧热 金属相对较低。

    Oxide magnetic material
    17.
    发明授权
    Oxide magnetic material 有权
    氧化物磁性材料

    公开(公告)号：US06902685B2

    公开(公告)日：2005-06-07

    申请号：US10381133

    申请日：2002-05-21

    申请人： Sachio Toyota ,  Isamu Furuchi ,  Yoshinori Kobayashi

    发明人： Sachio Toyota ,  Isamu Furuchi ,  Yoshinori Kobayashi

    IPC分类号： C01G49/00 ,  C04B35/26 ,  C04B35/40 ,  H01F1/10 ,  H01F1/11

    CPC分类号： H01F1/11 ,  C01G49/0054 ,  C01G49/009 ,  C01P2004/62 ,  C01P2006/11 ,  C01P2006/42 ,  C04B35/2633 ,  C04B35/2683 ,  C04B2235/3224 ,  C04B2235/3274 ,  C04B2235/3298 ,  C04B2235/3409 ,  H01F1/10

    摘要： A ferrite magnet powder and a ferrite magnet exhibiting improved magnetic properties are provided at a reduced manufacturing cost. An application product and manufacturing methods thereof are also provided. An oxide magnetic material includes, as a main phase, a ferrite having a hexagonal M-type magnetoplumbite structure. The material includes: A, which is at least one element selected from the group consisting of Sr, Ba, Pb and Ca; R, which is at least one element selected from the group consisting of Y (yttrium), the rare earth elements and Bi; Fe; and B (boron). The constituents A, R, Fe and B of the material satisfy the inequalities of 7.04 at %≦A≦8.68 at %, 0.07 at %≦R≦0.44 at %, 90.4 at %≦Fe≦92.5 at % and 0.015 at %≦B≦0.87 at % to the sum of the elements A, R, Fe and B.

    摘要翻译： 以降低的制造成本提供铁氧体磁体粉末和呈现磁性能改善的铁氧体磁体。 还提供了一种应用产品及其制造方法。 氧化物磁性材料包括具有六方M型磁铅矿结构的铁素体作为主相。 该材料包括：A，其为选自Sr，Ba，Pb和Ca中的至少一种元素; R是选自Y（钇），稀土元素和Bi的至少一种元素; 铁 和B（硼）。 材料的成分A，R，Fe和B满足不平等值7.04 at％<= A <= 8.68 at％，0.07 at％<= R <= 0.44 at％，90.4 at％<= Fe <= 92.5 at ％和0.015at％<= B <= 0.87 at％的元素A，R，Fe和B之和。