| 摘要 |
PURPOSE:To improve strength and toughness by mixing a mullite compsn. sol and a zirconia-stabilizer mixture sol to make a gel, calcining, molding and then sintering. CONSTITUTION:A boehmite sol and silica sol are mixed with the Al2O3/SiO2 molar ratio of 1.37-1.76, and 100 pts.wt. of this mixture is compounded with 0.05-1.5 pts.wt. of at least one sintering aid selected from MgO, Y2O3, TiO2, and Fe2O3 to obtain a mullite compsn. sol (A). And, 100 pts.wt. of zirconia sol and 0.05-2 pts.wt. of stabilizer selected from MgO, Y2O3, CaO, and CeO2 are mixed to obtain a zirconia-stabilizer mixture sol (B). Then, 90-65wt.% of the component (A) and 10-35wt.% of the component (B) are mixed and made into a gel. This gel is calcined, molded and then sintered. |
