| abstract |
The invention relates to the field of refractory materials, and in particular to a method for preparing a mullite anti-skin castable and a preform. parts, 10-20 parts of alumina powder, 5-10 parts of metal aluminum powder, 10-15 parts of silica sol and 5-10 parts of boron nitride, wherein: the metal aluminum powder is coated inside the silica sol. The anti-skin castable of the present invention has good thermal shock stability, high temperature stability and chemical corrosion resistance, so that it can adapt to complex use environments, and at the same time, the castable can make the surface of the preform during the sintering process. Smoother and denser, which increases its anti-skinning effect. |