Industrial & Laboratory Grade Fused Quartz Crucibles
Donghai County Nivra Quartz Products Co., Ltd. supplies premium high-temperature fused silica and transparent quartz crucibles engineered for high-purity thermal melting, chemical analysis, semiconductor silicon crystal growing, and precious metal casting. Manufactured using high-purity quartz raw sand (SiO₂ ≥ 99.99%), our crucibles offer exceptional thermal stability up to 1450 °C, ultra-low thermal expansion, and unmatched chemical resistance against corrosive mineral acids.
High-Temperature Fused Silica Quartz Crucible
Engineered for high-temperature melting, calcination, and sintering up to 1450 °C. Exceptional resistance against extreme thermal shock.
Clear Transparent Fused Quartz Crucible
Optically transparent cylindrical quartz crucibles designed for laboratory testing, spectroscopy sample prep, and molten reaction monitoring.
Arc-Melted Quartz Crucible for Silicon Ingot
Precision arc-fused silica crucibles with uniform bubble-free inner layers, specially designed for CZ silicon crystal growth and PV ingot pulling.
Quartz Ashing Crucible with Ground-Joint Lid
Standard and low-form quartz ashing crucibles designed for volatile material determination, acid digestion, and high-purity gravimetric procedures.
Custom Rectangular & Square Quartz Crucible Sagger
Fabricated rectangular quartz vessels and sintering trays designed for phosphors, lithium battery cathode materials, and rare-earth element firing.
Fused Silica Melting Pot for Precious Metals
Heavy-walled fused silica melting pots for melting gold, silver, copper, and specialty alloys under high-frequency induction or torch heating.
Technical Specifications & Material Performance
| Parameter | Clear Quartz Crucible | Opaque / Fused Silica Crucible |
|---|---|---|
| Chemical Composition | SiO₂ ≥ 99.99% | SiO₂ ≥ 99.9% |
| Continuous Operating Temp | 1100 °C | 1150 °C |
| Maximum Short-Term Temp | 1450 °C | 1450 °C |
| Coefficient of Thermal Expansion | 5.5 × 10⁻⁷ cm/cm·°C (20–300 °C) | 5.4 × 10⁻⁷ cm/cm·°C (20–300 °C) |
| Apparent Density | 2.20 g/cm³ | 2.05 – 2.18 g/cm³ |
| Hydroxyl (OH⁻) Content | < 5 ppm – 30 ppm (depending on grade) | < 30 ppm |
| Surface Finish Options | Fire polished / Optical clear | Smooth sand-blasted / Vitrified glazed |
Need Tailor-Made Quartz Crucibles for Your Process?
Donghai County Nivra Quartz Products Co., Ltd. delivers customized quartz vessels fabricated exactly to your technical drawings and purity demands with fast turnaround times and export-safe packaging.