Wear-resistant, high temperature, insulation materials which
Polytetrafluoroethylene (engineering plastics) - (- 195 ~ 250) ℃ can be used for a long time. For corrosion-resistant parts, anti-friction wear parts, seals, insulation and so on. Silicone rubber - Upper temperature limit (100 to 300) ° C. For high and low temperature parts, insulation, pipe joints and so on. Fluorine rubber - the use of the upper temperature of 300 ℃, for chemical lining, senior seals, high vacuum plastic parts.
Alumina - high temperature, corrosion resistance, wear resistance. Good electrical insulation 1600 ℃. For crucible, high temperature thermocouple casing, knives, mold and so on. Silicon nitride - has good high temperature strength, thermal expansion coefficient is small, high thermal conductivity, thermal shock resistance, the use of temperature as alumina, good electrical insulation. 1200 ℃ still have a high hardness. For mechanical seal ring, thermocouple casing, steam turbine blades and so on. Silicon carbide - high temperature strength, 1400 ℃ when the bending strength of (500 ~ 600) MPa. For the nozzle, furnace tubes, high temperature bearings, high temperature heat exchangers and so on.
Hexagonal boron nitride - good heat resistance, thermal stability, thermal conductivity, hardness is not high, the only easy machining of ceramics. Is the ideal heat dissipation material and high temperature insulation material. For high temperature containers, semiconductor thermal insulation materials, high temperature bearings, thermocouple casing. Cubic boron nitride - hardness close to the diamond, excellent wear-resistant materials. For high-speed cutting tools, such as drawing die.
Epoxy, temperature from 100-400 degrees, processing more convenient. Ceramic is the best and cheap.