Silicon Carbide Heater Physical And Chemical Properties
Physical properties
Element texture: hard and brittle, resistant to rapid heat, not easy to deform under high temperature, the other physical properties are as follows:
Thermal conductivity: 20 kcal / m · h · degree
Linear expansion coefficient: 5 × 10-6 (m / ℃)
Chemical properties
Silicon carbide has good chemical stability, strong acid resistance. Alkaline substances have an effect of erosion under high temperature conditions.
Long-term use of silicon-carbon rod components at temperatures above 1000 ℃ can occur with oxygen and water vapor as follows:
① Sic + 2O2 → Sio2 + CO2 ② Sic + 4H2O = Sio2 + 4H2 + CO2
As a result, the SiO2 content in the device gradually increases, and the resistance increases slowly, which causes aging. If the water vapor is too much, it will promote the oxidation of SiC. The H2 produced by the ② reaction and the O2 in the air combine with H2O and produce a vicious cycle. Reduce component life. hydrogen
(H2) can reduce the mechanical strength of the components. Nitrogen (N2) at 1200 ° C to prevent SiC oxidation above 1350 ° C and SiC react, so that the decomposition of chlorine (Cl2) SiC can complete decomposition of Sic.
Silicon carbon rod prices
The price of silicon carbide rods has a lot to do with the related factors, such as the geographical differences of the manufacturers, the differences of the manufacturers, the differences of the raw material channels and so on. In short, the choice of silicon carbide rod, be sure to choose manufacturers experienced manufacturers of long production. In the production of silicon carbon rod, try to be the best,
