Binder-free exfoliated flexible graphite foil (0.05–3.0 mm) for Spark Plasma Sintering (SPS) die/punch release liners, high-temperature vacuum gaskets, and anisotropic heat spreaders.
Calendared from thermally exfoliated natural flake graphite without any organic binders, resins, or fillers, flexible graphite foil is compressible, resilient, chemically inert, and thermally stable from −240 °C to +3,000 °C in vacuum or inert gas.
In materials research, 0.13–0.25 mm flexible graphite paper is universally wrapped around the inner bore and punch faces of Spark Plasma Sintering (SPS / FAST) and hot-press graphite dies (TB-GR-MLD) to ensure uniform electrical contact, prevent powder reaction with the die wall, and allow effortless sample ejection.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Carbon Purity | 99.5% Standard / 99.85% Nuclear Low-Sulfur / 99.95% Semiconductor |
| Bulk Density | 1.0 – 1.1 g/cm³ (Up to 1.5–1.8 g/cm³ high-density thermal foil) |
| Standard Thicknesses | 0.05, 0.10, 0.13, 0.20, 0.25, 0.35, 0.50, 0.80, 1.0, 1.5, 2.0, 3.0 mm |
| Thermal Conductivity | In-plane 140–300 W/m·K · Through-plane ~5 W/m·K |
| Service Temperature | −240 °C to +450 °C (Air) / +3,000 °C (Vacuum & Inert Gas) |
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 foil thickness (e.g., 0.13 mm or 0.25 mm for SPS liners; 1.0–2.0 mm for gaskets), purity tier, roll/sheet dimensions or pre-cut disc/sleeve sizes, and quantity.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare High-Purity Flexible Graphite Foil, Hot-Press Release Sheets & Vacuum Gaskets RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
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-GR-FLTHigh-purity graphitized soft felt rolls, CNC-machined rigid graphite insulation cylinders/boards, and activated battery electrode felts for vacuum furnaces and energy storage.
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-HBN-MCHot-pressed hexagonal boron nitride (h-BN) crucibles, rods, plates, and precision CNC components combining extreme thermal shock resistance, molten-metal non-wetting, and electrical insulation.
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.