Graphite Crucibles: Your Ideal Choice for High – Temperature Applications
Graphite crucibles are crucial components in various high – temperature industrial processes, renowned for their outstanding properties.
Exceptional Performance
- High Temperature Resistance: With a melting point of graphite reaching up to 3850℃, these crucibles can endure temperatures ranging from 1200℃ to 1600℃, remaining stable without deformation or damage.
- Excellent Thermal Conductivity: They feature remarkable thermal conductivity, rapidly and evenly transferring heat. This property significantly shortens the melting time, improving production efficiency.
- Superior Chemical Stability: Graphite crucibles exhibit strong resistance to both acidic and alkaline solutions. They do not participate in chemical reactions during the smelting process, ensuring the purity and quality stability of molten metals.
- Good Thermal Shock Resistance: Thanks to their low coefficient of thermal expansion, they can withstand rapid heating and cooling, maintaining their integrity even under extreme temperature changes.
- Low Adhesion: Graphite’s non – adhesive nature minimizes the adhesion of molten metal to the crucible walls. This ensures good fluidity and castability of the molten metal.
Diverse Types
- Natural Graphite Crucibles: Made primarily from natural flake graphite and refractory materials like clay, these clay – graphite crucibles offer excellent strength and thermal shock resistance. They are commonly used for smelting steel, copper, copper alloys, and other non – ferrous metals.
- Artificial Graphite Crucibles: With less than 1% impurities (ash content), they are suitable for refining high – purity metals. Ultra – high – purity graphite crucibles (ash content < 20ppm) are specifically designed for melting small amounts of precious metals, high – purity metals, high – melting – point metals, and oxides.
Wide Applications
- Metal Smelting: Graphite crucibles are extensively used in the smelting of alloy tool steels and non – ferrous metals such as copper, brass, gold, silver, zinc, and lead.
- Semiconductor Industry: They play a crucial role in silicon crystal growth, alloy melting, high – temperature treatment, epitaxial growth, sample heating, and high – temperature reactors.
- Industrial Ceramic Manufacturing: Graphite crucibles are used to hold raw materials during the precise control of reaction conditions, enabling the production of high – quality ceramic products.
When using graphite crucibles, proper care is essential. Keep them dry to prevent cracking during use. Handle them with care to avoid damage, and pre – heat them gradually before use.
Overall, graphite crucibles are the top choice for industries seeking high – performance, reliable solutions for high – temperature operations.
