Optically clear 99.99% (4N) fused quartz process tubes for CVD graphene/2D growth, semiconductor diffusion, photochemistry, and rapid-quench tube furnaces up to 1,150 °C.
Electrically fused high-purity quartz tubing (≥99.99% SiO2, metallic impurities typically <15–25 ppm) combines ultra-low thermal expansion (0.55 × 10⁻⁶ /K) with optical UV-to-NIR transparency and exceptional cleanliness. Unlike crystalline ceramics, fused quartz tolerates rapid sliding-zone heating and air-quench cooling cycles essential in 2D material CVD (graphene, MoS2, h-BN), rapid thermal annealing (RTA), and vacuum ampoule sealing.
Available in standard straight cut lengths with fire-polished ends as well as custom scientific glassblowing (ground Taper/Ball joints, hose barbs, closed-one-end ampoules, and stainless KF flange adapters).
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| SiO2 Purity | ≥99.99% (Al <12 ppm, Fe <1 ppm, Na/K/Li <1.5 ppm each) |
| Continuous / Peak Temp | 1,100 °C continuous / 1,200–1,250 °C short-term |
| Thermal Expansion (CTE) | 0.55 × 10⁻⁶ /K (20–320 °C, extreme thermal shock resistance) |
| Annealing / Softening Point | ~1,215 °C / ~1,680 °C |
| Hydroxyl (OH) Content | <150 ppm standard; low-OH (<5–10 ppm) vacuum grade available |
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 OD × wall thickness (or ID) × overall length, end finish (diamond-cut ground vs. fire-polished, closed-one-end, or ground glass joints), low-OH requirement if operating near 1,150 °C under vacuum, and quantity.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare High-Purity Fused Quartz Furnace Tubes RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
TB-SIO2-BTUltra-clean 99.99% fused quartz combustion boats, lidded CVD precursor sleds, and precision-slotted wafer carriers for contamination-free thermal processing.
TB-SIO2-CRFlame-polished 99.99% clear fused quartz crucibles, lids, and evaporating dishes for ultra-trace acid digestion, phosphor firing, and thermal shock cycling.
TB-SIO2-WNPrecision double-side optically polished UV synthetic fused silica (JGS1), optical quartz (JGS2), and full-spectrum IR fused silica (JGS3) windows and wafer substrates.
TB-AL2O3-TUImpervious high-purity sintered alumina furnace and process tubes for tube furnaces, CVD/annealing, and high-temperature thermal systems.
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.