Purified graphite crucibles for SiC crystal growth, vacuum furnaces, and semiconductor hot-zone consumables requiring low ash and low metal impurities.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Ash Content | < 10ppm; < 5ppm by RFQ | Lower ash and metal residues reduce impurity transfer during high-temperature crystal growth. |
| Density Window | Approx. 1.78-1.90 g/cm3 by grade | Density and pore structure affect purification depth, strength, and thermal behavior. |
Decision fit
Process engineers and procurement teams qualifying purified graphite crucibles for repeat furnace consumption.
Primary proof point
< 10ppm; < 5ppm by RFQ
Lower ash and metal residues reduce impurity transfer during high-temperature crystal growth.
RFQ trigger
| Decision Gate | What Buyers Should Check | Acceptance Evidence |
|---|---|---|
| Use-case fit | SiC PVT sublimation growth; Semiconductor vacuum furnace hot zones; High-purity lab crystal growth runs | Application, furnace duty, and buyer-side validation goal are confirmed before material or process route selection. |
| Parameter baseline | Ash Content: < 10ppm; < 5ppm by RFQ; Density Window: Approx. 1.78-1.90 g/cm3 by grade | Target ranges, report needs, and pass/fail criteria are written into the RFQ or sample approval plan. |
| Risk closure | Metal impurity migration: Specify ash and element limits up front, then align report format before sample approval.; Fragile crucible damage in transit: Use vacuum sealing, fitted cushioning, and export crate planning for brittle graphite parts. | Drawing notes, inspection scope, cleaning, coating, packaging, and traceability controls are agreed before repeat supply. |
| RFQ completeness | Drawing or CAD file with revision number; Target graphite grade, density, and ash specification; Outer diameter, inner diameter, wall thickness, and tolerance; Surface finish, purification, coating, or impregnation needs | 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
WhatsApp Engineering Support
Use WhatsApp for quick engineering clarification before a formal quote.
Yes. Ash < 10ppm is a common target, and lower targets such as < 5ppm can be reviewed by graphite grade, geometry, and purification route.
Send drawings, grade or density target, ash or impurity limits, dimensions and tolerances, surface requirements, quantity forecast, and delivery destination.
