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    Spark plug, alumina based insulator for spark plug and production process for same insulator
    22.
    发明申请
    Spark plug, alumina based insulator for spark plug and production process for same insulator 失效
    火花塞，氧化铝绝缘子用于火花塞和生产工艺相同的绝缘子

    公开(公告)号：US20020024160A1

    公开(公告)日：2002-02-28

    申请号：US09942776

    申请日：2001-08-31

    申请人： NGK SPARK PLUG CO., LTD.

    发明人： Makoto Sugimoto

    IPC分类号： H01T013/20 ,  C04B035/10

    CPC分类号： B28B1/30 ,  B28B3/003 ,  C04B35/111 ,  H01T13/38 ,  H01T21/02

    摘要： In insulator including alumina as a main component, a Na component in the insulator is set in the range of 0.07 to 0.5 wt % as Na2O. While the Na component content is as high as to have conventionally been regarded to be beyond the common sense, with this range of the Na component content, insulation resistance, mechanical strength and the like at high temperature are unexpectedly not reduced and an insulator with performances comparable to those of an insulator from conventional low soda alumina lower in Na component content than the above described range can be obtained. As a result, medium soda alumina and regular soda alumina that are much lower in cost than conventionally used low soda alumina can be used instead of the low soda alumina, so that dramatic reduction in production costs of insulator 2 for a spark plug 100 and in addition, of the spark plug 100 using the insulator 2 are realized.

    摘要翻译： 在以氧化铝为主要成分的绝缘体中，绝缘体中的Na成分设定为Na 2 O 0.07〜0.5重量％的范围。 虽然Na成分含量一直高于以往被认为是超常常数，但Na组分含量的这一范围，高温下的绝缘电阻，机械强度等意外地没有降低，并且具有性能的绝缘体 可以得到与常规低苏打氧化铝相比，Na成分含量低于上述范围的绝缘体。 结果，可以使用比常规使用的低苏打氧化铝低得多的中等苏打氧化铝和规则的苏打氧化铝代替低苏打氧化铝，从而大大降低了用于火花塞100的绝缘体2的生产成本 此外，实现了使用绝缘体2的火花塞100。

    Nanoporous ultrafine alpha-alumina powders and freeze drying process of preparing same
    24.
    发明申请
    Nanoporous ultrafine alpha-alumina powders and freeze drying process of preparing same 审中-公开
    纳米多孔超细α-氧化铝粉末及其制备的冷冻干燥过程

    公开(公告)号：US20040198584A1

    公开(公告)日：2004-10-07

    申请号：US10406060

    申请日：2003-04-02

    申请人： Saint-Gobain Ceramics & Plastic, Inc.

    发明人： Yuhu Wang

    IPC分类号： C04B035/10

    CPC分类号： B82Y30/00 ,  C01F7/02 ,  C01F7/023 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/16 ,  C09K3/1409 ,  C09K3/1463 ,  Y10T428/2982

    摘要： The present invention provides nanoporous null-alumina powders comprising powder comprising interconnected null-alumina primary particles having an average particle size of less than about 100 nm and an interpenetrated array of pores or voids. The invention also provides nanosized null-alumina powders comprising null-alumina particles having an average particle size of less than about 100 nm and slurries, particularly aqueous slurries, which comprise nanosized null-alumina powders of the invention. The invention further provides methods of manufacturing nanoporous null-alumina powders and nanosized null-alumina powders of the invention and methods of polishing using slurries of the invention.

    摘要翻译： 本发明提供了包含粉末的纳米多孔α-氧化铝粉末，其包含平均粒度小于约100nm的相互连接的α-氧化铝一次粒子和孔或空隙的互穿排列。 本发明还提供包含平均粒径小于约100nm的α-氧化铝颗粒和包含本发明的纳米级α-氧化铝粉末的浆料，特别是水性浆料的纳米级α-氧化铝粉末。 本发明还提供了制造本发明的纳米多孔α-氧化铝粉末和纳米级α-氧化铝粉末的方法以及使用本发明的浆料进行抛光的方法。

    Method of manufacturing aluminum-substituted hematite
    26.
    发明申请
    Method of manufacturing aluminum-substituted hematite 失效
    制备铝取代赤铁矿的方法

    公开(公告)号：US20040007160A1

    公开(公告)日：2004-01-15

    申请号：US10610564

    申请日：2003-07-02

    发明人： Jun Takada ,  Tatsuo Fujii ,  Makoto Nakanishi

    IPC分类号： C09C001/22 ,  C04B035/10

    CPC分类号： C01G49/0045 ,  C01P2002/72 ,  C01P2002/77 ,  C09C1/24

    摘要： A method of manufacturing aluminum-substituted hematite represented by null-(Fe1nullxAlx)2O3 where xnull0.01 to 0.15, by mixing an iron compound and an aluminum compound such that an atomic ratio of Fe to Al falls within the range of 99:1 to 85:15, adding citric acid and ethylene glycol to the mixture of the iron compound and aluminum compound to produce a gel, and pyrolyzing the gel, followed by calcining the pyrolyzed product.

    摘要翻译： 通过混合铁化合物和铝化合物，使Fe与Al的原子比落在99〜99的范围内，制造由α-（Fe1-xAlx）2O3表示的铝 - 取代赤铁矿的方法，其中X = 1至85:15，向铁化合物和铝化合物的混合物中加入柠檬酸和乙二醇以产生凝胶，并将凝胶热解，然后煅烧热解产物。

    Sintered alumina ceramic, method for producing the same, and cutting tool
    29.
    发明申请
    Sintered alumina ceramic, method for producing the same, and cutting tool 有权
    烧结氧化铝陶瓷，其制造方法和切削工具

    公开(公告)号：US20030027707A1

    公开(公告)日：2003-02-06

    申请号：US10198956

    申请日：2002-07-22

    申请人： NGK SPARK PLUG CO., LTD.

    发明人： Hiroshi Yamamoto ,  Takeshi Mitsuoka ,  Kazuhiro Urashima

    IPC分类号： C04B035/10 ,  C04B035/50 ,  C04B035/44

    CPC分类号： C04B35/50 ,  C04B35/117 ,  C04B35/505

    摘要： A sintered alumina ceramic obtained by preparing a raw material powder mixture containing alumina and a Group 3A metal oxide or a Group 3A metal compound which provides a Group 3A metal oxide on heating, and firing said raw material powder mixture. The sintered ceramic contains alumina particles having an average particle diameter of 4.0 nullm or smaller. In the sintered ceramic, the total content of alkali metal elements, alkaline earth metal elements, Si, and Ti as converted to oxides accounts for 0.1 mol or less with respect to 100 mols of alumina, the total peak intensity for the principal peaks for ReAlO3 and Re3Al5O12 (Re: Group 3A metal) amounts to from 1 to 75% of the intensity of the principal peak of alumina as measured by X-ray diffraction, and the relative density is 99.0% or higher with respect to the theoretical density.

    摘要翻译： 通过制备含有氧化铝和3A族金属氧化物的原料粉末混合物或在加热时提供3A族金属氧化物的3A族金属化合物，烧制所述原料粉末混合物而获得的烧结氧化铝陶瓷。 烧结陶瓷含有平均粒径为4.0μm以下的氧化铝粒子。 在烧结陶瓷中，转化为氧化物的碱金属元素，碱土金属元素，Si和Ti的总含量相对于100摩尔氧化铝为0.1摩尔以下，ReAlO 3的主峰的总峰强度 和Re 3 Al 5 O 12（Re：3A族金属）相当于通过X射线衍射测定的氧化铝主峰的强度的1〜75％，相对密度相对于理论密度为99.0％以上。

    High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check valve, and method for manufacturing high-purity alumina sintered body
    30.
    发明申请
    High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check valve, and method for manufacturing high-purity alumina sintered body 审中-公开
    高纯度氧化铝烧结体，高纯氧化铝球，半导体夹具，绝缘子，球轴承，止回阀及高纯氧化铝烧结体的制造方法

    公开(公告)号：US20030008765A1

    公开(公告)日：2003-01-09

    申请号：US10238602

    申请日：2002-09-11

    申请人： NGK SPARK PLUG CO., LTD.

    发明人： Tomonori Niwa ,  Tetsuji Yogo

    IPC分类号： C04B035/10

    CPC分类号： C04B35/111 ,  F16C33/32 ,  Y10T137/791

    摘要： A high-purity alumina sintered body having an alumina purity of not less than 99.9% by mass and a relative density of not less than 97% and exhibiting a weight loss of not greater than 100null10null4 kg/m2 when immersed in boiling 6N H2SO4 or 6N NaOH aqueous solution for 24 hours as measured according to JIS R1614 (1993). The high-purity alumina sintered body is obtained by firing a green body formed from an alumina powder having an alumina purity of not less than 99.9% by mass and containing, as impurities, Si, an Mg, Fe and alkali metals including Na, K and Li in a total amount of less than 100 ppm.

    摘要翻译： 氧化铝纯度不低于99.9质量％，相对密度不低于97％，浸渍在沸腾的6N H 2 SO 4中时，其重量损失不大于100×10 -4 kg / m 2的高纯度氧化铝烧结体 或6N NaOH水溶液24小时，根据JIS R1614（1993）测量。 高纯度氧化铝烧结体是通过焙烧由氧化铝纯度为99.9质量％以上的氧化铝粉末形成的生坯，并含有作为杂质的Si，Mg，Fe和碱金属，包括Na，K 和总量小于100ppm的Li。