Supply of boron nitride ceramics

Its main properties: 1. High heat resistance: 3000 ℃ sublimation, its strength is 2 times 1800 ℃ room temperature, 1500 ℃ air-cooled to room temperature and is not broken dozens of times, in an inert gas 2800 ℃ without softening. 2. High thermal conductivity: hot products as 33W / mk and iron, as in more than 530 ℃ thermal conductivity of the ceramic material is the largest material. 3. The low thermal expansion coefficient: expansion coefficient of 2 * 10-6 after the quartz glass, ceramic smallest. Coupled with its high thermal conductivity, thermal shock resistance so good. The excellent electrical properties: high temperature insulation is good, 25 ℃ is 1014Ω-cm, 2000 ℃ can be reached 103Ω-cm, is the best high-temperature ceramic insulation material, a breakdown voltage of 3KV / mm low dielectric loss. 108Hz when 2-5 * 10-4, a dielectric constant of 4, through microwave and infrared. 5. good corrosion resistance: general metals (iron, copper, aluminum, lead), rare earth metals, precious metals, semiconductor materials (germanium, silicon, gallium arsenide,), glass, molten salt (crystal stone, fluorine compounds, slag), inorganic acids, alkalis does not react. 6. The low friction coefficient: μ is 0.16, a high temperature is not increased, molybdenum disulfide, graphite is higher than the temperature, oxidizing atmosphere can be used to 900 ℃, available under vacuum to 2000 ℃. 7. B containing high purity high: impurity content of less than 10PPM, and containing B is greater than 43.6%. 8. machinability: Mohs hardness of 2, so it can be processed into a general method for machining high precision parts products.