Application of silicon nitride ceramic materials

Silicon nitride ceramic materials have high thermal stability, strong oxidation resistance, and high-level and excellent functions of commodity standard 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 outstanding chemical stability. It will not be oxidized below 1200°C. The formation of a protective film at 1200~1600°C can prevent further It is oxidized and will not be moisturized 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 and other molten metals. Silicon nitride heating element

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

Since silicon nitride can form a strong connection with silicon carbide, aluminum oxide, thorium dioxide, boron nitride, etc., it can be used as a contact material for modification with different proportions.

In addition, silicon nitride can also be used in solar cells. After the silicon nitride film is plated by the PECVD method, it can not only be used as an anti-reflection film to reduce the reflection of incident light, but also, during the deposition of the silicon nitride film, the reaction product hydrogen atoms enter the silicon nitride film As well as in the silicon chip, it plays a role in passivating defects. The ratio of the number of silicon nitride to silicon atoms here is not a severe 4:3, but it is not firm within a certain range according to the different technical conditions, and the physical properties of the film corresponding to different atomic ratios are different.

Used in ultra-high temperature gas turbines, aircraft engines, electric furnaces, etc.