Method for preparation of sintered body of rare earth oxide

    公开(公告)号:US06410471B1

    公开(公告)日:2002-06-25

    申请号:US09783602

    申请日:2001-02-15

    申请人: Masami Kaneyoshi

    发明人: Masami Kaneyoshi

    IPC分类号: C04B3550

    摘要: Disclosed is a method for the preparation of a high-quality sintered body of a rare earth oxide or a composite oxide of a rare earth oxide and an adjuvant oxide such as aluminum oxide. The method comprises shaping a rare earth oxide powder characterized by specified particle diameter distribution values of D50 and D90 and a specified specific surface area or a powder blend of the rare earth oxide and adjuvant oxide into a powder compact and subjecting the powder compact to a sintering heat treatment at a specified sintering temperature by increasing and decreasing the temperature up to and from the sintering temperature each at a rate not exceeding a specified upper limit.

    Ceramics and their power for scintillators, and method for producing same
    6.
    发明授权
    Ceramics and their power for scintillators, and method for producing same 失效
    陶瓷及其功能的闪烁体及其制造方法

    公开(公告)号:US06479420B2

    公开(公告)日:2002-11-12

    申请号:US09827180

    申请日:2001-04-06

    申请人: Ryouhei Nakamura

    发明人: Ryouhei Nakamura

    IPC分类号: C04B3550

    摘要: A sintered ceramic for a scintillator having a composition represented by the general formula of Gd3-xCexAlySizGa5-y-zO12, wherein 0.001≦x≦0.05, 1≦y≦4, and 0.0015≦z≦0.03, is produced by mixing gadolinium oxide, aluminum oxide, gallium oxide, a cerium salt, a silicon compound and a fluorine compound in such proportions as to provide the above composition; calcining the resultant mixture at a temperature of 1400-1600° C.; disintegrating the resultant calcined body to ceramic powder; pressing the ceramic powder to provide a green body; and sintering the green body at a temperature of 1600-1700° C. in a non-oxidizing atmosphere at 5×104 Pa or more, and optionally further by hot isostatic pressing at a temperature of 1400-1600° C. in an argon atmosphere.

    摘要翻译: 用于闪烁体的烧结陶瓷,其具有由通式Gd 3-x Ce x Se x Ga x-y-z O 12表示的组成,其中0.001≤x≤0.05,1≤y≤4,0.0015≤z≤0.03,为 通过以提供上述组成的比例混合氧化钆,氧化铝,氧化镓,铈盐,硅化合物和氟化合物而制备的; 在1400-1600℃的温度下煅烧所得混合物。 将得到的煅烧体分解成陶瓷粉末; 按压陶瓷粉末提供一个绿色的身体; 并在1600-1700℃的温度下在5×10 4 Pa以上的非氧化性气氛中烧结生坯,任选在氩气气氛下,在1400〜1600℃的温度下进一步进行热等静压。

    Ceria powder
    7.
    发明授权
    Ceria powder 失效
    二氧化铈粉

    公开(公告)号:US06238450B1

    公开(公告)日:2001-05-29

    申请号:US09553968

    申请日:2000-04-21

    IPC分类号: C04B3550

    摘要: A polishing slurry, useful in optical or CMP applications, comprises a ceria with a BET surface area of at least 10 m2/gm. The slurry may be made by subjecting a commercial ceria slurry comprising agglomerates to a mechano-chemical treatment at a pH of from 9 to 11 using media that are low purity alpha alumina or zirconia. Preferred slurries maintain a positive surface charge at all pH values. CMP slurries preferably comprise in addition an anionic surfactant to aid in removal of surface residues.

    摘要翻译: 可用于光学或CMP应用的抛光浆料包含BET表面积至少为10m 2 / gm的二氧化铈。 可以通过使用低纯度α氧化铝或氧化锆的介质,使包含附聚物的商业二氧化铈浆料在pH为9至11的机械化学处理下进行制备浆料。 优选的浆料在所有pH值下保持正表面电荷。 CMP浆料优选还包含阴离子表面活性剂以帮助除去表面残留物。

    Ceramic composition having high adsorptive capacity for oxygen at elevated temperature
    8.
    发明授权
    Ceramic composition having high adsorptive capacity for oxygen at elevated temperature 失效
    陶瓷组合物在高温下对氧具有高吸附能力

    公开(公告)号:US06365535B1

    公开(公告)日:2002-04-02

    申请号:US09433610

    申请日:1999-11-02

    IPC分类号: C04B3550

    CPC分类号: C04B35/50

    摘要: A ceramic composition having a high adsorptive capacity for oxygen at elevated temperature, including at least one of: Bi2−yEryO3−d; Bi2−yYyO3−d; La1−yBayCo1−xNixO3−d; La1−ySryCo1−xNixO3−d; La1−yCayCo1−xNixO3−d; La1−yBayCo1−xFexO3−d; La1−ySryCo1−xFexO3−d; and La1−yCayCo1−xFexO3−d; wherein x is from 0.2 to 0.8, y is from 0 to 1.0 and d=0.1 to 0.9. Such ceramic composition may be made using a modified Pechini synthetic procedure. The resulting ceramic composition is usefully employed as an adsorbent for separation of oxygen from an oxygen-containing feed gas mixture, e.g., in a pressure swing adsorption (PSA) process.

    摘要翻译: 一种陶瓷组合物,其在升高的温度下具有高的氧吸附能力,包括以下中的至少一种:Bi 2-y E y O 3 -d; Bi2-yYyO3-d; La1-yBayCo1-xNixO3-d; La1-ySryCo1-xNixO3-d; La1-yCayCo1-xNixO3-d; La1-yBayCo1-xFexO3-d; La1-ySryCo1-xFexO3-d; 和La1-yCayCo1-xFexO3-d; 其中x为0.2至0.8,y为0至1.0,d = 0.1至0.9。 这种陶瓷组合物可以使用经修改的Pechini合成方法制备。 得到的陶瓷组合物有用地用作用于从含氧进料气体混合物中分离氧气的吸附剂,例如在变压吸附(PSA)方法中。

    Ceramic compounds undergoing martensitic transformation and methods for producing them, and highly-tough composite materials
    9.
    发明授权
    Ceramic compounds undergoing martensitic transformation and methods for producing them, and highly-tough composite materials 失效
    经历马氏体转变的陶瓷化合物及其制备方法,以及高韧性复合材料

    公开(公告)号:US06174832B1

    公开(公告)日:2001-01-16

    申请号:US09162255

    申请日:1998-09-28

    IPC分类号: C04B3550

    CPC分类号: C04B35/44

    摘要: A ceramic compound which undergoes martensitic transformation comprises a compound represented by compositional formula Ln1-xSixAlO3+0.5x obtained by substituting a part of LnO1.5 in LnAlO3-type compounds with SiO2, where Ln represents at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb, and x=0.01 to 0.3.

    摘要翻译: 经历马氏体转变的陶瓷化合物包含由通过用LnAlO 3型化合物中的一部分LnO 1.5取代SiO 2而获得的组成式Ln1-xSixAlO3 + 0.5x表示的化合物,其中Ln表示选自以下的至少一种元素: Sc,Y,La,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm和Yb,x = 0.01〜0.3。