Si3N4 3-5um High Purity 99.995% Silicon Nitride Powder

Vickers hardness:2200

Melting point:1900℃

1Silicon nitride ceramic materials have excellent properties such as high thermal stability, strong oxidation resistance and high product dimensional accuracy. Since silicon nitride is a covalent compound with high bond strength and can form an oxide protective film in the air, it also has good chemical stability. It will not be oxidized below 1200 ° C, and the formation of a protective film at 1200 ~ 1600 ° C can prevent further oxidation. Oxidized, and not infiltrated or corroded by many molten metals or alloys such as aluminum, lead, tin, silver, brass, nickel, etc., but can be corroded by molten magnesium, nickel-chromium alloy, stainless steel, etc.

2 Silicon nitride ceramic materials can be used for high-temperature engineering components, advanced refractory materials in the metallurgical industry, corrosion-resistant components and sealing components in the chemical industry, knives and cutting tools in the machining industry, etc.

3 Since silicon nitride can form a strong bond with silicon carbide, alumina, thorium dioxide, boron nitride, etc., it can be used as a bonding material and modified in different proportions.