Ultrafine silicon for precision casting: white powder, pure in quality, with chemical stability, acid and alkali resistance, large specific surface area, developed void, large surface activity, low oil absorption rate, strong thickening, high temperature resistance, good electrical insulation, ultraviolet resistance and other characteristics.
Its superior specific surface area determines its good filling ability. In addition, ultra-fine silicon powder has excellent thermal shock resistance, which can effectively protect the service life of casting products. Meanwhile, when the ultrafine silicon powder is heated, there is a certain degree of thermal expansion, which just compensates for the shrinkage of epoxy resin, gypsum, etc., during the curing reaction at this temperature, so that the casting body does not deform.