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What is the melting point and hardness of carbon black? Are there any other features?
Carbon black, also known as precipitated hydrated silica, is made by reacting liquid sodium silicate with high-quality transparent inorganic acid, filtering, washing with water and drying. The product is white amorphous particles with specific gravity of 0. 186-0.298, melting point of 1780 and refractive index of 1.46. Porous, large internal surface area, large dispersion, acid resistance, alkali resistance, high temperature resistance, good insulation and high dispersion.