Product Description

Formula Si3N4, a molecular weight of **0.*8, a percentage by weight, which silicon accounts for *0.*6%, representing *9.*4% of nitrogen. Two elements electronegativity similar, is a strong covalent bonding compounds (ionic bonds accounted for only *0%). Color is gray, white or gray. Hexagonal. Crystal was hexahedral. Density 3.*4. Hardness of 9 to 9.5, Knoop hardness of about ***0, microhardness ****0MPa. Melting point ***0 ℃ (under pressure). Typically decompose at atmospheric pressure ***0 ℃. Specific heat capacity of 0.*1J / (g · K). Generate heat for ***1.*7kJ / mol. Thermal conductivity of *6.7W / (m · K). Linear expansion coefficient of 2.*5 × ***6 / ℃ (*0 ~ ***0 ℃). Insoluble in water.