The silicon carbide RbSiC boards are applicable in the sintered zone of roller hearth kiln, which produces daily porcelain, sanitary ceramics, construction ceramics and so on. The roller is a key part of roller hearth kiln,which has excellent load-bearing ability and thermal shock resistance under high temperature,and can be applied in high temperature zone of roller hearth kiln for tableware,sanitary ware and electronic porcelain.