The recombined product made from molten quartze (i.e. quartze glass) has low coefficient of thermcal expansion, high strength and chemical resistance (especially acid and chlorine). However, when it is used for a long time above lOOO ° C, the crystal form will change to square quartze transformation, which is easy to crack and peel off the products.
Inorganic non-metallic materials -> Refractory materials