Volume density index of graphite electrode

Volume density index of graphite electrode

The volume density index of graphite electrode refers to the ratio of the mass of the graphite electrode sample to its volume, with the unit of g/cm³. The following is the significance of the volume density index:

(1) Influence on strength: The larger the volume density, the denser the internal structure of the electrode, the lower the porosity, the higher the mechanical strength, and the better it can withstand high temperature, current and other effects during use, and it is not easy to break or damage.

(2) Influence on conductivity: Generally speaking, graphite electrodes with high volume density have more regular arrangement of carbon atoms, smoother electron conduction path, relatively low resistivity, better conductivity, which can reduce power loss and improve production efficiency.

(3) Influence on oxidation resistance: Higher volume density can make the electrode surface denser, and oxidizing substances such as oxygen are difficult to enter the interior of the electrode, thereby improving the oxidation resistance of the electrode and extending its service life.

(4) Influence on thermal shock resistance: Appropriate volume density helps to improve the thermal shock resistance of the electrode, so that it can better withstand thermal stress under rapid temperature changes and reduce defects such as cracks caused by uneven thermal expansion and contraction.