Heat Treatment Industry

In order to ensure high temperature resistance, corrosion resistance and excellent thermal conductivity of graphite parts, high purity and high density graphite materials should be selected. Such materials have better stability and longer service life1.

Graphite materials in the vacuum furnace need to face high temperature, possible high pressure and corrosive environment, so it must have good chemical stability to maintain its performance and service life 1.

Graphite heating elements must be able to withstand the effects of high temperature environments without degradation of performance. Therefore, it is necessary to select graphite materials with high temperature resistance ratings. For example, when the vacuum level is within a certain range, the operating temperature cannot exceed a specific temperature (e.g. 2200°C), otherwise additional measures such as maintaining a low vacuum or inputting a protective gas are required2 .

Graphite heating elements may be subjected to mechanical forces during use, so they should have a certain degree of mechanical strength in order to avoid problems such as deformation or fracture1.

In a high temperature environment, graphite is prone to react with oxygen in the air, leading to performance degradation. Therefore, choosing graphite materials with good oxidation resistance can maintain its stability in high temperature environment and prolong its service life13 .

For graphite rods and other heating elements, graphite rods with good uniformity in the middle part of the heat generation should be selected to ensure the uniformity of the furnace temperature and to extend the service life of the heating element45.