| 摘要 |
1481500 Cordierite refractory GENERAL MOTORS CORP 15 Oct 1975 [4 Nov 1974 42210/75 Heading C1J A ceramic refractory fired body having a high thermal shock resistance and a low thermal coefficient of expansion consists substantially of magnesia, alumina and silica in crystalline form with cordierite as the major phase and mullite as the minor phase and the chemical compensation of the body includes a total quantity of Na 2 O and K 2 O not in excess of 0À14% by weight of the body. |
