Advantages of High Purity Graphite Products

High purity graphite is a specially processed graphite material with excellent properties such as corrosion resistance, excellent thermal conductivity, and low permeability.

The main advantages of high purity graphite products include:

1. High Temperature Resistance

Graphite has a melting point of 3850 ± 50°C and a boiling point of 4250°C. Even when exposed to extremely high-temperature arc heating, graphite experiences very little weight loss and has a very low coefficient of thermal expansion.

The strength of graphite increases with rising temperature, and its strength can be doubled at 2000°C. During exothermic welding processes, the chemical reaction temperature generated by the ignition of exothermic welding powder is extremely high, requiring the graphite molds used in the process to have excellent high-temperature resistance.

2. Excellent Electrical and Thermal Conductivity

The electrical conductivity of high purity graphite is about 100 times higher than that of ordinary non-metallic minerals. Its thermal conductivity exceeds that of many metal materials, including steel, iron, and lead.

The thermal conductivity of graphite decreases as the temperature increases. Even at extremely high temperatures, graphite can become an excellent thermal insulation material.

Graphite has electrical conductivity because each carbon atom forms only three covalent bonds with other carbon atoms, leaving one free electron available for charge transfer.

During exothermic welding applications, multiple welding points are often required, resulting in a large workload. The excellent thermal conductivity of graphite meets these requirements by providing both high-temperature resistance and rapid heat dissipation.

3. Excellent Lubricating Performance

The lubricating performance of high purity graphite depends on the size of its graphite flakes. Larger flakes result in a lower friction coefficient and better lubrication performance.

4. Excellent Chemical Stability

Graphite has excellent chemical stability at room temperature and is resistant to corrosion from acids, alkalis, and organic solvents.

5. Good Plasticity

High purity graphite has excellent toughness and can be processed into very thin sheets.

In exothermic welding applications, different types of welding molds may be required for various joint structures. The good plasticity of high purity graphite allows it to be manufactured into molds with different models, specifications, and connection designs.

6. Excellent Thermal Shock Resistance

High purity graphite can withstand rapid temperature changes during normal use without damage. When exposed to sudden temperature variations, graphite has minimal volume change and does not easily develop cracks.