| 摘要 |
<p>The preparation of various mechanical materials for use in a hot dipping bath by using a composition comprising 70 to 95 % Si3N4, 2 to 10 % Al2O3, 1 to 10 % AlN, and 1 to 10 % Y2O3, can markedly prolong the operation period until defects are created in the products.</p> |
