What Are The Physical Properties Of Boron Nitride Ceramics

What are the physical properties of boron nitride ceramics

Boron nitride has chemical resistance properties and is not corroded by inorganic acids and water. The boron-nitrogen bond is broken in the hot concentrated alkali. Above 1200℃, it will start to oxidize in the air. The melting point is 3000°C, and it starts to sublimate when it is slightly lower than 3000°C. It begins to decompose at about 2700°C under vacuum. Slightly soluble in hot acid, insoluble in cold water, density greater than 2.0, bending strength 30Mpa.

The maximum operating temperature is 900°C in an oxidizing atmosphere, and it can reach 2800°C in an inactive reducing atmosphere, but the lubrication performance is poor at room temperature. Most of the properties of boron carbide are better than carbon materials. For hexagonal boron nitride: low friction coefficient, good high temperature stability, good thermal shock resistance, high strength, high thermal conductivity, low expansion coefficient, high resistivity, corrosion resistance, microwave or transparent Infrared.