| 摘要 |
PURPOSE:To enable low temp. sintering of a ceramic substrate composed of alumina ceramics without decreasing the thick film adhesive strength. CONSTITUTION:A ceramic raw material composed of 92-94wt.% Al2O3 as a main component, 4-6wt.% SiO2 and the balance CaO and MgO is formed into a specified form and sintered in a high speed at 1460-1550 deg.C max. sintering temp. The sintering time from the start of temp. rising to the end of decreasing of temp. is <=6 hours. The quantity of SiO2 in the surface part of the obtd. ceramic substrate is 10-20wt.% to the quantity of Al2O3. |
