Precision-machined high-purity isostatic graphite melting crucibles, clay-free analytical fusion capsules, and continuous casting dies for precious metals, copper alloys, silicon, and crystal growth.
Machined from dense, fine-grain isostatic graphite (1.82–1.88 g/cm³) with zero clay or silica binders, our high-purity graphite crucibles and continuous casting dies are non-wetting toward molten gold, silver, copper, aluminum, brass, tin, and glass/fluoride melts.
High thermal conductivity (110–140 W/m·K) and natural RF/MF electromagnetic coupling allow direct induction heating or rapid resistance heating up to 2,500 °C in vacuum or inert gas.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Carbon Purity | 99.95% (<50 ppm ash) or 99.999% (<5 ppm Halogen-Purified) |
| Bulk Density | 1.80 – 1.88 g/cm³ (Isostatic Grade) |
| Thermal Conductivity | 110 – 140 W/m·K |
| Open Porosity | 8% – 10% (Optional PyC or glassy impregnation) |
| Max Temp (Inert/Vacuum) | 2,500 – 2,800 °C |
Reference values reflect typical sintered, fused, or wrought grades. Exact batch test figures are confirmed on your written quotation and accompanying lot Certificate of Analysis.
Specify crucible OD × ID × height (or mL/kg metal capacity), flat vs. hemispherical bottom, pouring spout or lid requirements, and alloy/material being melted.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare High-Purity Graphite Crucibles, Stopper Rods & Continuous Casting Dies RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
TB-GR-CNCPrecision CNC-machined isostatic graphite vacuum-furnace heaters, susceptors, brazing fixtures, wafer carriers, and graphite nuts/bolts made to customer CAD drawings.
TB-GR-MLDHigh-compressive-strength fine-grain graphite Spark Plasma Sintering (SPS) die/punch sets, hot-press sleeves, continuous casting dies, and polished ingot molds.
TB-PG-GCUltra-pure 5N CVD pyrolytic graphite (anisotropic thermal/diamagnetic plates) and mirror-polished gas-impermeable glassy (vitreous) carbon electrodes, wafers, and crucibles.
TB-AL2O3-CRHigh-purity cylindrical, conical, and rectangular alumina crucibles and matching lids for high-temperature melting, calcination, and gravimetric analysis.
Submit your purity grade, geometry, quantity, and documentation requirements. Every order includes the producing mill's batch Certificate of Analysis (COA) and pre-shipment dimensional verification.