High-purity isostatic graphite crucible bodies, lids, liners, sleeves, and holder interfaces tailored for SiC PVT sublimation growth.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Ash Content | < 10ppm; < 5ppm reviewed by application | Lower ash and controlled trace metals reduce contamination risk during high-temperature SiC sublimation growth. |
| Graphite Density | Approx. 1.80-1.90 g/cm3 by isostatic grade | Density and pore structure affect strength, purification depth, thermal behavior, and machining stability. |
| Assembly Geometry | Defined by drawing, furnace interface, and boule size | Body, lid, sleeve, and seed-holder fit influence vapor containment, thermal symmetry, and repeatability. |
Decision fit
Semiconductor crystal growth laboratories, SiC wafer manufacturers, and PVT furnace operators qualifying repeatable crucible consumables.
Primary proof point
< 10ppm; < 5ppm reviewed by application
Lower ash and controlled trace metals reduce contamination risk during high-temperature SiC sublimation growth.
RFQ trigger
| Decision Gate | What Buyers Should Check | Acceptance Evidence |
|---|---|---|
| Use-case fit | 6-inch and 8-inch SiC PVT boule growth; 4H-SiC and 6H-SiC sublimation growth furnaces; Replacement crucible sets for pilot lines and crystal growth labs | Application, furnace duty, and buyer-side validation goal are confirmed before material or process route selection. |
| Parameter baseline | Ash Content: < 10ppm; < 5ppm reviewed by application; Graphite Density: Approx. 1.80-1.90 g/cm3 by isostatic grade; Assembly Geometry: Defined by drawing, furnace interface, and boule size | Target ranges, report needs, and pass/fail criteria are written into the RFQ or sample approval plan. |
| Risk closure | Crucible cracking during thermal cycling: Review wall thickness, corner radius, material grade, ramp assumptions, and support interfaces before sample machining.; Vapor leakage or poor lid fit: Confirm mating dimensions, groove design, tolerance stack-up, and thermal expansion clearance across the crucible set. | Drawing notes, inspection scope, cleaning, coating, packaging, and traceability controls are agreed before repeat supply. |
| RFQ completeness | 2D/3D drawings for crucible body, lid, liner, sleeve, and holder; Boule size target, furnace type, operating temperature, and atmosphere; Graphite grade, density window, ash limit, and impurity focus elements; Critical OD, ID, wall thickness, thread, groove, and surface-finish tolerances | 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 body, lid, liner, sleeve, ring, and seed-holder drawings as one PVT crucible package.
TaC coating should be reviewed when the process needs stronger graphite isolation, lower particle risk, or longer service life in high-temperature PVT duty.
Missing mating dimensions, unclear ash or impurity targets, undefined coating boundaries, and absent annual forecast usually create the longest clarification loop.
