| 摘要 |
<p>of the disclosure: Alumina-containing calcium silicate being in the form of secondary particles, shaped bodies and a process for preparing the same, said secondary particles being composed of alumina-containing calcium silicate crystals having an index of crystallite antigrowth of at least 8 and interlocked with one another in the form of a globular shell, the particles being about 5 to about 70 .mu.m in diameter, up to about 0.13 g/cm3 in apparent density and at least 10 g per particle in initial breaking load, and said shaped bodies being composed of the secondary particles.</p> |
