Silicon nitride powder


product details


(1) Product supply: silicon nitride is an important structural ceramic material. It is a super hard material with lubricity and wear resistance. It is an atomic crystal. It is resistant to oxidation at high temperature. Moreover, it can resist the impact of cold and heat. When heated to over 1000 ℃ in the air, it will cool rapidly and then heat rapidly without breaking. Because of its excellent properties, silicon nitride ceramics are often used to make bearings, turbine blades, mechanical seal rings, permanent molds and other mechanical components.


(2) Product application: mainly used in high-temperature engineering parts, high-grade refractory materials in metallurgy industry, anti-corrosion parts and sealing parts in chemical industry, cutting tools and cutting tools in machining industry, etc. Because silicon nitride can form a strong combination with silicon carbide, alumina, thorium dioxide, boron nitride, etc., it can be used as a combination material and modified in different proportion. In addition, silicon nitride can also be used in solar cells.


(3) Common product specifications: 5 μ m 3 μ m 1.5 μ M.


(4) Chemical composition and physical index (as shown below)


(5) Product executive standard: GB / T 37258-2018

Chemical composition and particle size specification
Purity	相含量（%）Alpha phase (%）	N	The content of the following impurities is not more than（%）
Si3N4			Fe	Al	Ca	C	O	Free carbon Si，F	Total impurity content（%）
99.9%	90%	>38.5%	0.0015%	0.001	0.001%	0.001%	1.5%	0.2%	0.1%
粒度：5µm  3µm  1.5µm