| 摘要 |
<p>Morphologically improved ceric oxide particulates have a BET specific surface, measured after calcination at a temperature of from 350 DEG to 450 DEG C., of at least 100 m2/g, a total pore volume of at least 0.3 cm3/g, and the pores of which having a mean diameter larger than 50 ANGSTROM . The improved ceric oxide particulates are prepared by reacting a cerium salt with a strong base in the presence of carboxylate ions, or a cerium carboxylate with a strong base; separating the precipitate of true cerium hydroxide thus produced; and washing, heat-treating, and calcining such precipitate.</p> |
