Our custom glassware department works with high-purity fused silica (SiO₂ ≥ 99.99%) and high-grade 3.3 borosilicate glass. Produced using precision diamond CNC milling, flame seam welding, and optical polishing to support corrosive chemical baths and high-temperature thermal cycling.
Seamless flame-welded rectangular quartz tank built for silicon wafer cleaning, acid etching baths, and electrolytic applications. Features chemical inertness against concentrated acids, high thermal shock stability, and optical wall clarity.
Heavy-duty evaporating dish available in 100ml, 150ml, 200ml, and customized capacities. Engineered with a precision pouring spout and flat bottom. Resists thermal shock, direct flame heating, and aggressive reagents in analytical laboratories.
Download our complete manufacturing catalog or send your custom technical drawings directly to our engineering team for a quick DFM review and quotation.
Get CatalogCompare fundamental thermodynamic and chemical properties to match your exact process requirements.
| Physical / Chemical Property | High-Purity Fused Quartz (SiO₂) | Borosilicate Glass 3.3 |
|---|---|---|
| Chemical Composition | SiO₂ ≥ 99.99% | 81% SiO₂, 13% B₂O₃, 4% Na₂O/K₂O, 2% Al₂O₃ |
| Max. Continuous Working Temp | 1100 °C | 450 °C (Short term up to 500 °C) |
| Softening Point | ≈ 1683 °C | ≈ 820 °C |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ /°C (Extremely high thermal shock resistance) | 3.3 × 10⁻⁶ /°C (High thermal shock resistance) |
| Optical Transmission Range | 190 nm – 2500 nm (UV, VIS, near-IR) | 350 nm – 2500 nm (Visible to near-IR) |
| Corrosion Resistance | Unaffected by acids except HF and hot concentrated H₃PO₄ | High resistance to water, neutral and acid solutions |
Every piece of customized glassware manufactured by Donghai County Nivra Quartz Products Co., Ltd. goes through rigid quality controls.
Validation of dimensional tolerances, wall thickness uniformity, thermal stress points, and weld geometry.
Diamond-wheel edge grinding, CNC core drilling, and laser profile cutting of plates and tubes.
Hydrogen-oxygen micro-torch flame welding executed by master glassblowers with 10+ years experience.
Controlled electric furnace annealing to remove residual stresses, followed by optical strain and dimensional checks.