Graphite components are widely used in vacuum furnaces due to their excellent properties such as high temperature resistance, corrosion resistance, and good thermal and electrical conductivity. The main application scenarios are as follows:
Graphite Rods
Often employed as heating elements or for electrical conduction, graphite rods can endure temperatures close to 3500 °C. Their electrical resistivity is relatively low, around 0.4 - 0.7 μΩ·m at room temperature, enabling efficient heat generation. Additionally, they exhibit excellent chemical inertness, resisting reactions with most substances in the vacuum environment.
Graphite Columns
As crucial support structures, graphite columns offer high mechanical strength to bear the weight of various components within the furnace. With a density of about 2.0 - 2.3 g/cm³, they are lightweight yet robust. Their coefficient of thermal expansion is low (2.0 - 4.0 × 10⁻⁶ /°C in the layer plane), minimizing dimensional changes during temperature fluctuations, thus ensuring stable support.
Graphite Heating Plates
These plates are designed for uniform heating. Their high thermal conductivity, ranging from 119 - 165 W/(m·K) at room temperature, allows for rapid and even heat distribution across workpieces placed on them. Graphite heating plates are also highly resistant to thermal shock, maintaining integrity after repeated heating and cooling cycles in the vacuum furnace.
