| 摘要 |
<p>Aqueous dispersion contains a powder obtained by mixing, preferably spraying, a core of doped pyrogenic silica with a cerium (Ce) salt solution or suspension to form a Ce oxide shell. The powder in the dispersion has an average secondary particle size not more than 0.2 micron. An Independent claim is also included for the production of the aqueous dispersion by predispersing the powder in an aqueous medium, optionally in conjunction with additives, then dispersing the predispersion.</p> |
