Refractory and high temperature resistant material: silica sol has the characteristics of strong adhesion, good corrosion resistance, good resistance to hot mildew and high temperature of 1600 ° C. it can be used as adhesive for Refractory, thermal insulation materials, etc. , high strength, high temperature volume stability, good thermal shock resistance, but also can improve the product's oxidation resistance and slag corrosion resistance. 1. When making ceramic furnace, use silica sol as the binder of ceramic fiber, impregnate aluminum silicate fiber mat with silica sol, add coagulant, make thermal insulation felt, play a role in thermal insulation. 2. The cooker added silica sol non-flammable, smokeless, Environmental Protection. 3. When the transformer magnetic core is made, the silicon steel sheet can be bonded into a whole by using the silica sol as the binder, which can also play the role of insulation and high temperature resistance. Four. Adding a certain amount of silica sol into the coating solution can improve the appearance, insulation and heat resistance of the coating, reduce the expansion coefficient of the coating material and improve the magnetism of the silicon steel.