Composite oxide powder, catalyst and process for producing the same
    10.
    发明授权
    Composite oxide powder, catalyst and process for producing the same 失效
    复合氧化物粉末,催化剂及其制造方法

    公开(公告)号:US06762147B2

    公开(公告)日:2004-07-13

    申请号:US10079872

    申请日:2002-02-22

    IPC分类号: B01J2108

    摘要: Composite oxide powder has a large specific surface area and a large pore volume even after a high-temperature durability test, without losing oxygen storage ability of a single metal oxide. In this composite oxide powder, a first metal oxide having oxygen storage ability is held as ultrafine particles in the form of islands by a second metal oxide which is different from the first metal oxide, pore volume is not less than 2 cc/g and the first metal oxide particles have a diameter of not more than 30 nm even after subjected to high temperature of 900° C. or more. Since the first metal oxide particles are held in the form of islands by the second metal oxide particles, separated from each other and suppressed from contacting each other, the first metal oxide particles hardly grow granularly.

    摘要翻译: 复合氧化物粉末即使在高温耐久性试验后也具有大的比表面积和较大的孔体积,而不损失单一金属氧化物的储氧能力。 在该复合氧化物粉末中,具有储氧能力的第一金属氧化物通过与第一金属氧化物不同的第二金属氧化物保持为岛状的超微粒子,孔体积不小于2cc / g, 即使在900℃以上的高温下,第一金属氧化物粒子的直径也不大于30nm。 由于第一金属氧化物颗粒通过第二金属氧化物颗粒被保持为岛状,因此彼此分离并被抑制彼此接触,因此第一金属氧化物颗粒几乎不会颗粒生长。