The pressureless sintered silicon carbide (SSiC) ceramic products are made of ultra-fine silicon carbide powder and sintered at high temperature. The silicon carbide content is more than 98% and without free silicon, yielding the product density more than or equal to 3.10g/cm3. What's more, our products have a great deal of technical advantages, such as high mechanical strength, high hardness, wear resistance, high temperature resistance, strong acid and alkali corrosion resistance, oxidation resistance, thermal shock resistance, good thermal conductivity, extreme cold and heat resistance and high temperature creep resistance. As a result, the products are widely used in many hign-tech fields, such as industry, aerospace, nuclear power, metal smelting, high-temperature furnace, lithium-ion battery production, powder metallurgy, ceramic chemical machinery, ultra-fine grinding, paper-making, medicine and so on.