| 摘要 |
PURPOSE:To lengthen the service life of the titled refractory by blending mixture of the specific quantity of metallic Al and metallic Si, etc., and the specific quantity of containing alkali, less than the specific ratio of silicate glass, etc., to the specific blending ratio of alumina, amorphous silica and carburizing material. CONSTITUTION:To 100wt.pts. of refractory material composing of 30-92wt% alumina quality raw material, 5-40wt% amorphous silica material and 3-30wt% carburizing material, 1-15wt.pts. of mixing powder of the metallic aluminum and the metallic silicon or metallic magnesium or alloy powder and 0.5-10wt.pts. of the silicate glass or borosilicate glass containing <=10wt% alkali, and in case, 2-20wt.pts. of silicon carbide are blended and burnt, to make a refractory, such as nozzle for continuous casting, etc. The preventing force, to brittleness or peeling and spalling phenomena under mechanical and thermal stress are added by working a stress relaxation function to the refractory improving the corrosion resistance and stable structure caused by becoming close by the relative action between the metallic powder and the glassy material. |
