| 摘要 |
A sol-gel alumina grain is provided having from about 10 to 200 microcracks, preferably from 50 to 150 microcracks per square millimeter, in the form of an interconnected network which has good abrasive qualities both in bonded and in coated applications. Also a process is provided for the production of such a seeded sol-gel alumina filamentary abrasive grain which comprises quenching the grain from a temperature of from 250 DEG C to 750 DEG C by dumping it into water at about room temperature. <IMAGE> |
