When graphite products are used as structural and impermeable materials, their products must have a high bulk density.

The bulk density of graphite products has a direct effect on its electrical conductivity, thermal conductivity, mechanical strength and oxidation resistance. In addition, the bulk density also changes the permeability, lubrication and wear resistance of the products.

Increasing the bulk density of graphite die is unfavorable to the improvement of thermal expansion coefficient. Therefore, graphite products used in thermal shock can not only pursue high bulk density.

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