| 摘要 |
The metal oxide powder (I) comprising aggregates formed by cohesion of primary particles, which has a cohesive degree (alpha ) of 1.1 to 2.0 and a cohesive scale (beta ) of 3 to 10, the cohesive degree (alpha ) and the cohesive scale (beta ) being defined by specific formula. The metal oxide powder (I) comprising aggregates formed by cohesion of primary particles, which has a cohesive degree (alpha ) of 1.1 to 2.0 and a cohesive scale (beta ) of 3 to 10, the cohesive degree (alpha ) and the cohesive scale (beta ) being defined by formula (alpha =6/(SXrho Xd(XRD)) (I) and formula (beta =weight average particle diameter/d(XRD)) (II); S : specific surface area of the powder; rho : density; and d(XRD) : particle diameter of the powder determined by X-ray diffraction analysis. Independent claims are included for the following: (1) preparing (M1) (I), involves mixing a diluent with a metal oxide precursor to produce a mixture having a diluent content in the range of 40-70 weight %, milling the mixture, calcining the milled mixture, and removing the diluent from the calcined mixture by water washing; and (2) a polishing agent comprising (I). |
