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Oxidation Directly Affects the Life of Graphite Die

Release time: 2021-01-25

The oxidation of graphite material is the primary cause of the damage of graphite die, so the oxidation resistance directly affects the service life of graphite die.

 

Different graphite materials have different oxidation temperature, and the oxidation temperature of ordinary graphite die for hot pressing is about 450℃. The oxidation rate of graphite material is controlled by the diffusion rate of oxidation gas.

 

Therefore, the smaller the impurity content of graphite die, the better. Metal elements in impurities catalyze the oxidation of graphite. The lower the ash and porosity in graphite, the better, especially the porosity. 


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