Boron nitride properties: lubricant, high thermal conductivity, less thermal expansion, good thermal shock resistanc, ... boron nitride , which is a lubricant, high thermal conductivity, less thermal expansion, good thermal shock resistance, high electrical ... Inert atmosphere 2400CFlexural strength: 100 MPaCompressing strength 280 MPaThermal conductivity 35 W/(m * K )Coefficient f thermal expansion 2.0 ...