PREPARATION METHOD OF SILICA RADOME USING SLIP CASTING

摘要

PURPOSE: A method for preparing a silica radome using the slip casting is provided, to enhance the adsorbing velocity of the fumed silica of high purity on gypsum in slip casting by granulation, thereby reducing the amount of the impurities contained in silica, increasing the sintering temperature and improving the mechanical strength of the silica radome. CONSTITUTION: The method comprises the steps of dispersing the fumed silica with a specific surface area of 20-300 m2/g into distilled water in the ratio of 1:99 to 40:60 by weight and homogenizing it to prepare a primary silica slurry; drying and calcining the primary silica slurry and pulverizing it mechanically to prepare a granular secondary silica slurry; re-dispersing the secondary silica slurry into distilled water in the ratio of 20:80 to 70:30 by weight and ball milling the solution to prepare the final slurry; casting the final slurry to a gypsum mold to form the adsorbed layer on the surface of the gypsum mold; and drying, calcining and sintering the molded one to prepare a silica radome.