Pyrolytic carbon coating is a thin layer of pyrolytic carbon coated on the surface of highly purified isostatic graphite using chemical vapor deposition (CVD) technology. It has high density, high purity, and anisotropic thermal, electrical, magnetic, and mechanical properties.
● The surface is dense and free of pores.
● High purity, total impurity content<20ppm, good airtightness.
● High temperature resistance, strength increases with increasing usage temperature, reaching the highest value at 2750 ℃,sublimation at 3600 ℃.
● Low elastic modulus, high thermal conductivity, low thermal expansion coefficient, and excellent thermal shock resistance.
● Good chemical stability, resistant to acid, alkali, salt, and organic reagents, and has no effect on molten metals, slag, and other corrosive media. It does not oxidize significantly in the atmosphere below 400 ℃, and the oxidation rate significantly increases at 800 ℃.
● Without releasing any gas at high temperatures, it can maintain a vacuum of 10-7mmHg at around 1800 ℃.
● Melting crucible for evaporation in semiconductor industry
● High power electronic tube gate.
● Brush that contacts the voltage regulator.
● Graphite monochromator for X-ray and neutron diffraction.
● Various shapes of graphite substrates and atomic absorption tube coating.
Pyrolytic carbon coating effect under a 500X microscope, with intact and sealed surface.
General physical properties | |||
Item | Unit | Parallel to coating surface | Vertical to coating surface |
Bulk density | Mg/m³ | 2.2 | 2.2 |
Hardness | HSD | 100 | —— |
Electrical resistivity | μΩ·m | 2.00~4.00 | 2~5x103 |
Thermal expansion coefficient | 10-6/K | 1.7 | 28 |
Tensile strength | MPa | 98~147 | fragile |
Young's modulus | GPa | 29~39 | |
thermal conductivity | W/(m·K) | 170~420 | 2~4 |
*The temperature range of thermal expansion coefficient is RT to 1000 ℃ |
VeTek Semiconductor is a leading manufacturer of customized PyC Coating Rigid Felt Ring in China, specializing in advanced materials for many years. Our PyC Coating Rigid Felt Ring have dense surface and high purity. With 2 laboratories and 12 production lines, thousand-grade and hundred-grade production workshops in our factory, welcome to visit us.
Read MoreSend InquiryVeTek Semiconductor is a leading supplier of customized Pyrolytic Graphite Coated graphite Elements in China, specializing in advanced materials for many years. Our Pyrolytic Carbon Coated Graphite Parts have dense surfaces and no pores. High purity, high temperature resistance, good chemical stability are the characristic of our PyC coating. Welcome to establish long-term cooperation with us.
Read MoreSend Inquiry