| 摘要 |
PURPOSE:To obtain the titled ceramics product which has high strength and is free from shrinkage and deformation on calcination by molding a mixture composed of hydraulic cement, fused vitrifiable material powder, magnesium silicate ore powder, etc., and water, then previously hardening the molding with and calcining the molding to the specific max. temp. or above. CONSTITUTION:The above-mentioned admixture contg. the hydraulic cement is molded by a cast molding method, press molding method, etc., used for production of ordinary pottery. The green ware body of the molding is then cured under humidification and is rested to previously hydrate and harden the cement components; thereafter, the molding is calcined under the following conditions. Namely, the molding is calcined at the max. calculation temp. of about >=1100 deg.C (generally about 1100 to 1250 deg.C) in addition to the presence of the above- mentioned magnesium silicate, etc., in order to prevent the efflorescence by the glassy components, etc. The desired ceramics product which prevents the efflorescence is obtd. in this way. The preferable range of the compounding weights of the above-mentioned raw materials is shown in the table. |
