PAN-based soft and rigid carbon felt insulation for SiC PVT, crystal growth, and high-temperature vacuum furnace hot zones.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Insulation Format | Soft felt, rigid board, cylinder, ring, or custom shape | Format determines installation fit, heat-loss control, and replacement speed inside the hot zone. |
| Density and Thickness | Defined by furnace duty and drawing | Density, thickness, and compression affect thermal gradient stability and mechanical handling. |
| Purity Route | Standard or purified by RFQ | Purified PAN carbon felt can reduce outgassing and contamination risk near crystal growth processes. |
Decision fit
Thermal engineers and furnace operators specifying insulation fit, purity, and replacement cycle.
Primary proof point
Soft felt, rigid board, cylinder, ring, or custom shape
Format determines installation fit, heat-loss control, and replacement speed inside the hot zone.
RFQ trigger
| Decision Gate | What Buyers Should Check | Acceptance Evidence |
|---|---|---|
| Use-case fit | SiC PVT hot-zone insulation; Crystal growth furnace thermal barriers; High-temperature vacuum furnace insulation packs | Application, furnace duty, and buyer-side validation goal are confirmed before material or process route selection. |
| Parameter baseline | Insulation Format: Soft felt, rigid board, cylinder, ring, or custom shape; Density and Thickness: Defined by furnace duty and drawing; Purity Route: Standard or purified by RFQ | Target ranges, report needs, and pass/fail criteria are written into the RFQ or sample approval plan. |
| Risk closure | Outgassing during furnace startup: Define atmosphere, bakeout expectations, ash target, and purification need during the RFQ stage.; Poor fit or insulation gaps: Confirm ID, OD, height, thickness, compression allowance, and mating graphite parts before production. | Drawing notes, inspection scope, cleaning, coating, packaging, and traceability controls are agreed before repeat supply. |
| RFQ completeness | Rigid board, rigid cylinder, ring, soft felt roll, or custom formed format; ID, OD, height, thickness, density, compression, and installation constraints; Operating temperature, vacuum or inert atmosphere, and purity or ash target; Quantity per furnace, replacement cycle, annual forecast, and delivery timeline | Engineering can return a quote direction without avoidable loops for drawing, purity, coating, quantity, or delivery gaps. |
Confirm furnace duty, drawing revision, target purity, operating atmosphere, and replacement cycle before material selection.
Match isostatic graphite grade, purification depth, coating route, and machining allowance to the process risk.
Machine graphite bodies, lids, rings, heaters, carriers, and insulation interfaces against the approved drawing pack.
Align dimensional checks, purity report format, cleaning, vacuum sealing, cushioning, and crate requirements before shipment.
Review how crucibles, hot-zone parts, and insulation fit a PVT growth workflow.
Check the factory workflow for drawing-based graphite part production.
Align inspection reports, sealing, cushioning, and export crate expectations.
Open the related page to continue technical qualification.
Open the related page to continue technical qualification.
Inquiry Email
Attach DWG, STEP, or PDF drawings and include purity, tolerance, quantity forecast, and delivery country.
Instant Chat
+8618857971991
Use WhatsApp for quick engineering clarification before a formal quote.
Yes. We can review rigid felt cylinders, rings, boards, and formed insulation geometry based on furnace drawings.
Soft felt is useful where installation flexibility matters; rigid felt is better when shape stability, defined clearances, and repeat replacement fit are important.
Purified felt should be reviewed for SiC crystal growth, semiconductor furnaces, and other hot zones where ash, outgassing, or particle risk affects process quality.
