High-purity graphitized soft felt rolls, CNC-machined rigid graphite insulation cylinders/boards, and activated battery electrode felts for vacuum furnaces and energy storage.
Graphitized above 2,200 °C in inert furnaces, PAN- and rayon-based graphite felts achieve ultra-low thermal conductivity, minimal moisture adsorption, and low volatile outgassing inside vacuum and inert-gas hot zones up to 2,800 °C. Rigid carbon-bonded insulation boards and cylinders—optionally faced with reflective graphite foil or protective C/C composite sheet—provide self-supporting hot-zone barrels for heat-treatment, SiC crystal growth (PVT), and solar ingot furnaces.
Hydrophilically surface-treated PAN graphite felts are also supplied for vanadium, iron-chromium, and zinc-bromine redox flow battery (RFB) porous electrodes.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Carbon Purity | ≥99.2% standard; ≥99.9% (<50–100 ppm ash) semiconductor grade |
| Bulk Density | 0.08–0.12 g/cm³ (soft felt) / 0.16–0.22 g/cm³ (rigid board/cylinder) |
| Thermal Conductivity (1,500 °C Vac) | ~0.25–0.45 W/m·K |
| Max Operating Temp | 350 °C (Air) / 2,000–2,200 °C (Vacuum) / up to 2,800 °C (Inert Ar) |
| Standard Thicknesses | 3, 5, 6, 8, 10, 12 mm (soft); 15–100 mm (rigid) |
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 soft flexible roll/sheet vs. self-supporting rigid board/cylinder, precursor (PAN vs. lower-conductivity Rayon) or RFB battery-activated grade, thickness, L×W or ID×OD×H dimensions, graphite foil facing needs, and ash purity limit.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare Rigid & Soft Graphite Vacuum Furnace Insulation Felt RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
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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.