How long can a graphite crucible last for a long time?
The special thermal shock resistance, thermal expansion of graphite is anisotropic, and the macro expansion coefficient is small, the temperature change under the condition that the volume change of graphite is not large, coupled with its good thermal conductivity, good thermal shock resistance and graphite.
When the temperature increases, the graphite crucible not only does not soften, but the strength is increased. At 2500 degrees, the tensile strength of graphite increases by one time.
High temperature resistance, graphite melting point is very high, in the vacuum of 3850 degrees, sublimation at low pressure, sublimation temperature of 2200 degrees, and the general material is different
