High Purity Graphite Crucible

🔬 What Makes It “High-Purity”?

• Made from graphite ≥99% carbon content, with advanced versions reaching 99.9–99.99% purity, as shown by CVD or isostatic-pressed manufacturing

• Purity minimizes metal contamination, crucial when melting precious metals like gold, silver, platinum, or in semiconductor-grade processing

  🔥 Key Benefits & Properties

  • Exceptional thermal stability and conductivity (typically 50–150 W/m·K, up to 400‑1500 W/m·K for pyrolytic graphite) supports fast, uniform heating and reduces energy use .

  • Thermal shock resistant, often tolerating ΔT >1000 °C without cracking .

  • Chemical neutrality—graphite doesn’t react with most molten metals; its non-wetting nature means easy pouring and cleanup .

  • High operating temperatures: stable up to ~2000–3000 °C in inert or vacuum environments; ~1800 °C open-air performance .

  • Strong mechanical durability: compressive strength ~55–75 MPa; bending strength ~30–40 MPa

  • 🧪 Typical Uses

    • Jewelry & Precious Metals: Melting and alloying gold, silver, platinum; ideal for small bench-top furnaces in jewelry casting.

    • Lab & R&D: Sample preparation, alloy testing, sintering ceramics, and chemical reactions.

    • Semiconductor Research: Pyrolytic graphite variants support ultra-high purity processes like silicon crystal pulling 3.

    • Metallurgy & Casting: Suitable for non-ferrous metals, rare earth alloys, and specialty glass processing.