Titania-zirconia powder and process for producing the same
    1.
    发明授权
    Titania-zirconia powder and process for producing the same 有权
    二氧化钛 - 氧化锆粉末及其制造方法

    公开(公告)号:US06391276B1

    公开(公告)日:2002-05-21

    申请号:US09525232

    申请日:2000-03-14

    IPC分类号: C01G2300

    摘要: Disclosed are (1) a titania-zirconia powder having at least a part of the zirconia solid-dissolved in the titania crystalline phase or at least a part of the titania solid-dissolved in the zirconia crystalline phase, (2) a titania-zirconia powder containing 3 to 30 wt % of zirconia and 0.5 to 10 wt % of yttria and containing less than 20 wt %, in total, of at least a complex oxide having a composition of ZrTiO4 or (Ti,Zr) O2, monoclinic phase zirconia, and tetragonal phase zirconia, wherein the titania-zirconia powder comprises an anatase phase, and which retains a specific surface area of 34 m2/g or more after heat-treated at 900° C. for 5 hours in the air, and (3) a titania-zirconia powder wherein the titania-zirconia powder (1) or (2) having an average particle size of 1 &mgr;m or smaller is mutually dispersed with an alumina powder; and processes for producing the powders are disclosed.

    摘要翻译: 公开了(1)二氧化钛 - 氧化锆粉末,其中至少一部分氧化锆固体溶解在二氧化钛结晶相中,或至少一部分固体溶解在氧化锆晶相中,(2)二氧化钛 - 氧化锆 含有3〜30重量%的氧化锆和0.5〜10重量%的氧化钇和至少含有20重量%的至少具有ZrTiO 4或(Ti,Zr)O 2组成的复合氧化物,单斜相氧化锆 和四方相氧化锆,其中二氧化钛 - 氧化锆粉末包含锐钛矿相,并且在900℃下在空气中热处理5小时后,比表面积保持为34m 2 / g以上,(3 )二氧化钛 - 氧化锆粉末,其中平均粒度为1μm或更小的二氧化钛 - 氧化锆粉末(1)或(2)与氧化铝粉末相互分散; 公开了制造粉末的方法。

    Catalyst for purifying exhaust gases and process for producing the same
    2.
    发明授权
    Catalyst for purifying exhaust gases and process for producing the same 失效
    净化废气的催化剂及其制造方法

    公开(公告)号:US5945369A

    公开(公告)日:1999-08-31

    申请号:US569396

    申请日:1995-12-08

    摘要: A catalyst for purifying exhaust gases includes a porous support; a cerium oxide or a solid solution of a cerium oxide and a zirconium oxide in a state of mutual solid solution, loaded on the porous support; and a noble metal element loaded on the porous support. The cerium oxide or the solid solution has an average particle diameter of from 5 to 100 nm. The cerium oxide is present in the solid solution in an amount of from 0.2 to 4.0 by molar ratio with respect to the zirconium oxide therein. The catalyst can be prepared by: coating and calcinating on a support substrate a slurry of a cerium oxide sol, a cerium oxide sol and a zirconium oxide sol, on a solid solution powder of a cerium oxide and a zirconium oxide in a state of mutual solid solution; and loading a noble metal element thereon. The cerium oxide or its solid solution has a surface area large enough to effect an oxygen storage function, and has an average particle diameter large enough to prevent the same from entering deeply into fine pores of a porous support, thereby providing a catalyst fully exhibiting both of the oxygen storage capability and the catalytic activity.

    摘要翻译: 用于净化废气的催化剂包括多孔载体; 以相互固溶态的氧化铈或氧化铈和氧化锆的固溶体装载在多孔载体上; 以及负载在多孔载体上的贵金属元素。 氧化铈或固溶体的平均粒径为5〜100nm。 相对于其中的氧化锆,氧化铈以相对于氧化锆的摩尔比为0.2〜4.0的量存在于固溶体中。 催化剂可以通过以下步骤制备:在氧化铈和氧化锆溶胶的固溶体粉末上以相互的状态将氧化铈溶胶,氧化铈溶胶和氧化锆溶胶的浆料在载体基材上涂覆和煅烧 固溶; 并在其上装载贵金属元素。 氧化铈或其固溶体具有足够大的表面积以实现储氧功能,并且具有足够大的平均粒径以防止其相当于深入多孔载体的细孔中,从而提供充分显示两者的催化剂 的储氧能力和催化活性。

    Silicon nitride sintered body
    6.
    发明授权
    Silicon nitride sintered body 失效
    氮化硅烧结体

    公开(公告)号:US5523268A

    公开(公告)日:1996-06-04

    申请号:US361584

    申请日:1994-12-22

    CPC分类号: C04B35/584

    摘要: A silicon nitride sintered body includes silicon nitride as a principal component, silicon carbide dispersed therein and at least one of boron and boron compounds in an amount of from 0.005 to 0.5% by weight in terms of the weight of boron with respect to the total weight of the sintered body. The addition of boron or boron compounds improves the high-temperature characteristics such as creep resistance of the sintered body.

    摘要翻译: 氮化硅烧结体包括氮化硅作为主要成分,其中分散有碳化硅,硼和硼化合物中的至少一种以相对于总重量的硼重量计为0.005至0.5重量% 的烧结体。 硼或硼化合物的添加改善了烧结体的高温特性,如耐蠕变性。

    Resistor built-in spark plug
    9.
    发明授权
    Resistor built-in spark plug 失效
    电阻内置火花塞

    公开(公告)号:US3967230A

    公开(公告)日:1976-06-29

    申请号:US517053

    申请日:1974-10-22

    CPC分类号: H01T21/02 H01T13/34 H01T13/41

    摘要: A resistor built-in spark plug comprises an insulator formed with an axially extending inner hole, a stem fitted in the upper part of said hole in said insulator, a center electrode fitted in the lower part of said hole, a resistor disposed in the central part of said hole, and copper-glass electrode layers disposed between said resistor and said stem and between said resistor and said center electrode. Said resistor is made by firing and solidifying powder of resistor mixture consisting of 75 to 38 volume percent of main resistor component containing tin oxide and 25 to 62 volume percent of glass powder with softening temperature of 300.degree. to 600.degree.C. Said copper-glass electrode layers are made by firing and solidifying a mixture of copper powder and glass powder with the softening temperature of above 530.degree.C and more than 30.degree.C higher than the softening point of glass in the resistor portion.

    摘要翻译: 电阻内置火花塞包括形成有轴向延伸的内孔的绝缘体,安装在所述绝缘体的所述孔的上部的杆,安装在所述孔的下部的中心电极,设置在所述中心的电阻器 所述孔的一部分和设置在所述电阻器和所述杆之间以及所述电阻器和所述中心电极之间的铜 - 玻璃电极层。 所述电阻是通过将软化温度为300〜600℃的由含有氧化锡的75〜38体积%的主电阻体和25〜62体积%的玻璃粉末组成的电阻混合物的粉末进行烧结固化而制成的。 通过烧结并固化铜粉和玻璃粉末的混合物,其软化温度高于530℃且比电阻器部分中的玻璃的软化点高30℃以上制成电极层。