| 摘要 |
PURPOSE:To obtain sintered alumina having high bulk density and to contrive to improve flexural strength, by adding a specific amount of molten frit consisting of Al2O3, CaO and B2O3 to alumina and sintering the blend at a specific low temperature. CONSTITUTION:This sintered alumina is formed by sintering a molded article of a composition of alumina containing 3-8wt.% frit at 1,250-1,300 deg.C. The frit is produced by melting three components of Al2O3, CaO and B2O3. The sintered alumina is sintered at low temperature, is not expanded, has high bulk density and improved flexural strength. |
