| 摘要 |
PURPOSE:To produce a light-weight sintered alumina clinker having excellent spalling resistance and heat-insulation, a high porosity and strength to suppress the temperature drop of a furnace made of a refractory containing the clinker as an aggregate and small shrinkage in reheating. CONSTITUTION:The objective sintered material composed of sufficiently developed corundum crystals and having a high porosity and a low bulk density is produced by using a raw material having an average particle diameter of 5-60mum and composed of two or more kinds of mixed powder having different alumina crystal forms, granulating or compression-molding the raw material together with a proper amount of a binder and a proper amount of water and baking the granules or the compression-molded article at >=1800 deg.C. |
