High purity silicon carbide grinding inner barrel density small weight

(1) High mechanical strength, as good as
High mechanical strength can effectively prevent material deformation, which is very important. Silicon carbide has higher mechanical strength than corundum. For example, the compressive strength of silicon carbide is 224MPa, while that of corundum is only 75.7MPa. The bending strength of silicon carbide is 15.5MPa, and that of corundum is 8.72MPa.

(2) High temperature resistance, small coefficient of thermal expansion
Silicon carbide is made at high temperatures. In some high temperature environment, the material is required to have a certain processing strength, and meet the processing accuracy, and silicon carbide ceramics can achieve these two points. The highest use temperature of silicon carbide is about 800℃, and the bearing temperature of steel is only 250℃. By rough calculation, the average thermal expansion coefficient of SIC is 4.4×10-6/ C in the range of 25~1400℃. The thermal expansion coefficient of SIC is much smaller than that of other abrasives and high temperature materials. For example, the coefficient of thermal expansion of corundum can be as high as (7~8)× 10-6/℃.

(3) Corrosion resistance
Silicon carbide because of its melting point (decomposition temperature), chemical inertia and thermal shock resistance is high, can be used for a variety of silicon carbide ceramic products, such as ceramic products furnace grinding tools, ceiling plate and sagger, zinc smelting industrial vertical cylinder distillation furnace with silicon carbide brick, aluminum electrolytic cell lining, crucible, small furnace material.