| 摘要 |
<p>Ceric oxide powder (I) of crystalline primary particles with carbonate groups on surface and in layer near surface has Brunauer Emmett Teller (BET) surface area 25-150 m 2>/g, average primary particle diameter 5-50 nm and surface layer about 5 nm deep; has carbonate concentration decreasing continuously from surface, so that carbon (C) content from carbonate groups is 5-50 area-% at surface and 0-30 area-% at depth of about 5 nm; and contains not less than 99.5 wt.% ceric oxide, calculated as CeO 2, and 0.01-0.3 wt.% (in)organic C with respect (I). Independent claims are included for the following: (1) production of (I); (2) (I) produced by this process; (3) dispersion containing (I); (4) use of (I) or dispersion for chemical-mechanical polishing; (5) use of (I) as catalyst, UV absorber, toner component or constituent of fuel cells.</p> |
