Tantalum carbide coated graphite crucibles for contamination-sensitive SiC PVT growth, carbon-source isolation, and longer hot-zone consumable life.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| TaC Coating Route | CVD TaC; thickness defined by RFQ | Dense coating can reduce direct graphite exposure and particle risk in high-temperature SiC growth environments. |
| Base Purity Target | < 10ppm; < 5ppm reviewed by application | Coating performance still depends on substrate purity, outgassing behavior, and surface preparation. |
Decision fit
SiC wafer manufacturers and crystal growth teams evaluating TaC-coated consumables to reduce graphite interaction and extend replacement intervals.
Primary proof point
CVD TaC; thickness defined by RFQ
Dense coating can reduce direct graphite exposure and particle risk in high-temperature SiC growth environments.
RFQ trigger
| Decision Gate | What Buyers Should Check | Acceptance Evidence |
|---|---|---|
| Use-case fit | Advanced 6-inch and 8-inch SiC PVT growth; PVT crucible liners, source-area parts, and gas-guide interfaces; High-purity crystal growth programs qualifying lower contamination risk | Application, furnace duty, and buyer-side validation goal are confirmed before material or process route selection. |
| Parameter baseline | TaC Coating Route: CVD TaC; thickness defined by RFQ; Base Purity Target: < 10ppm; < 5ppm reviewed by application | Target ranges, report needs, and pass/fail criteria are written into the RFQ or sample approval plan. |
| Risk closure | Coating delamination: Review base graphite grade, surface preparation, coating thickness, ramp rate, and thermal-cycle duty before sample approval.; Uncoated shadow areas: Mark all coated and uncoated surfaces on the drawing, especially grooves, threads, bores, and mating faces. | Drawing notes, inspection scope, cleaning, coating, packaging, and traceability controls are agreed before repeat supply. |
| RFQ completeness | Crucible, liner, lid, or ring drawing with revision number; Base graphite grade or density target and purification requirement; Target coating material, thickness range, and surfaces to coat; Operating temperature, atmosphere, cycle length, and cleaning method | 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.
A dense CVD TaC layer can reduce direct graphite exposure and help control contamination risk, but the final route should be reviewed against geometry, purity target, and process cycle.
Send the part drawings, coating surface map, target thickness, base graphite grade, purity requirement, operating cycle, and cleaning constraints.
