Precision Fused Quartz Glass Core Products
Engineered for ultra-high temperature furnaces, corrosive chemical processing, photolithography, and semiconductor wafer carrier systems. Directly customizable to CAD/STEP technical drawings.
High Purity Fused Quartz Glass Bell Jar for Semiconductor
Corrosion-resistant quartz chamber engineered for plasma etching, LPCVD reactors, and extreme thermal cycling.
Custom Clear Fused Quartz Plate & Optical Sheet
Double-sided precision polished optical window, supporting continuous 1100°C operational thresholds with minimal thermal distortion.
Transparent High Pressure Pure Quartz Glass Tube
Precision-drawn tubes for tube furnaces, chemical piping, and boilers requiring resistance to severe acidic reagents and pressure shifts.
High Temperature Frosted Quartz Disc & Plate
Sandblasted and chemically frosted quartz baffles and diffusion plates custom-machined for laser systems and wafer annealing furnaces.
Fused Quartz Cylinder Crucible & Bath Tank
Seamless fused cylindrical tanks and crucibles designed for non-ferrous metal smelting, crystal pulling, and acidic leaching baths.
High Precision Optical Grade Quartz Sight Glass
Extreme shock-resistant optical sight glasses and heat observation windows offering >92% high visual transparency under harsh setups.
UV Transparent Polished Fused Quartz Disc
Fabricated from synthetic silica (JGS1) optimized for high UV transmissibility down to 185nm for lithography and germicidal UV systems.
High-Purity Quartz Photocatalytic Reactor Vessel
Custom blown and bent internal jacket reactors with ground joints for UV-driven photolysis, analytical labs, and bio-synthesis arrays.
Why Global Engineers Source from Zunex Quartz
Situated directly in Donghai County—the crystal and quartz raw-material cluster of China—Zunex Quartz Products Co., Ltd. integrates vertical supply agility with micro-level CNC and laser fabrication expertise.
Native Donghai Supply Cluster
Direct access to premier natural silica reserves in Jiangsu. Complete upstream-downstream control allows wholesale pricing without sacrificing raw chemical purity.
Cold Laser & CNC Processing
Pioneering ultra-precision quartz laser drilling, edge grooving, flanging, and fire-polishing to micron-scale tolerances (±0.05mm) strictly to your engineering drawings.
Full Optical Grades: JGS1-JGS3
From Deep UV synthetic quartz (>85% T at 193nm) to bubble-free thermal tubing and IR-grade fused silica, we match the exact spectral curve your project mandates.
Zero-Breakage Export Crating
Reinforced multi-tier shock absorption: precision EPE foam inserts, vacuum barrier films, and fumigated timber crates configured specifically for fragile ocean/air freight.
Technical Whitepaper: Material Physics & Grade Selection
Fused quartz (fused silica) is the premier glass substrate for severe thermal shocks, aggressive chemistry, and precision optics due to near-zero thermal expansion and high dielectric strength.
| Physical / Chemical Property | Typical Metric Value | Operational Significance for Engineers |
|---|---|---|
| SiO₂ Purity Grade | ≥ 99.99% (Electronic Grade ≥ 99.999%) | Prevents metal ion leaching (Fe, Cu, Na) during high-temp wafer diffusion. |
| Continuous Working Temp | 1100 °C (1373 K) | Maintains structural integrity in continuous thermal process tubes without sagging. |
| Short-Term Max Peak Temp | 1300 °C (Softening point at 1683 °C) | Withstands rapid thermal annealing (RTA) and rapid firing protocols. |
| Thermal Expansion (CTE) | 5.5 × 10⁻⁷ cm/cm·°C (20°C - 320°C) | Can be heated to 1100°C and plunged into cold water without thermal shock breakage. |
| Dielectric Strength | 25–40 kV/mm (at 20°C) | Superior high-frequency electrical insulation for microwave and plasma chambers. |
| Refractive Index (nd) | 1.4585 (at 589.3 nm) | Exceptional optical transmission with minimal dispersion across VIS-IR regimes. |
Engineer’s Sourcing Note: Fused quartz is synthesized by melting natural high-purity quartz crystals (electrically fused or gas-fused), while synthetic fused silica is produced via chemical vapor deposition of silicon halides. For applications requiring deep ultraviolet transmission below 220 nm, specify JGS1 to eliminate hydroxyl (OH) absorption and metallic banding.
JGS1 (Synthetic Fused Silica)
Spectral Band: 185nm – 2500nm. Synthesized from SiCl4 with zero bubble inclusions. Unsurpassed transparency in deep UV and excimer laser optics; completely free of bubble defects.
JGS2 (Optical Fused Quartz)
Spectral Band: 220nm – 2500nm. Refined from high-purity natural quartz crystal. Outstanding optical transmission for UV-Visible sight glasses, spectrophotometer cuvettes, and standard lasers.
JGS3 (Infrared Fused Quartz)
Spectral Band: 260nm – 3500nm. Vacuum electric-fused quartz with low hydroxyl (OH < 5 PPM). Eliminates the strong absorption band at 2730nm, making it standard for industrial infrared heating tubes.
Procurement Foresight: Emerging Trends in Quartz Tube Manufacturing
How semiconductor fab expansions, green hydrogen synthesis, and automated continuous drawing processes are transforming the global supply dynamic.
1. Semiconductor Wafer Scaling to 300mm/450mm
As microchip fabrication transitions toward larger batch runs, the demand for large-diameter fused quartz furnace diffusion tubes (OD > 350mm to 550mm) has surged. Manufacturing these massive cylinders requires ultra-stable vertical drawing towers and automated hot flame rotary lathes to ensure wall thickness uniformity within ±0.2mm, mitigating thermal collapse risks during months-long furnace runs.
2. Cold-Laser Micro-Machining Replacing Diamond Tooling
Traditional mechanical diamond drilling induces subsurface micro-fractures in fused quartz, leading to catastrophic failure under prolonged 1000°C vacuum operation. The industry is rapidly pivoting toward picosecond and femtosecond laser cold processing. Laser drilling and micro-channel cutting achieve chip-free edge finishes (Ra < 0.2μm) without requiring aggressive chemical etching.
3. Ultra-Low Hydroxyl (OH) Stabilization for Photovoltaics
Next-generation TOPCon and Perovskite-Silicon tandem solar cells operate at elevated thermal conversion efficiencies. Quartz combustion and furnace tubes must maintain hydroxyl content below 10 PPM to prevent devitrification (crystallization into cristobalite) under sodium-rich environments, extending tube lifecycle from 6 months to over 18 months.
4. Supply Chain Consolidation in China's Crystal Capital
Global original equipment manufacturers (OEMs) are bypassing multi-tier regional brokers and partnering directly with integrated Donghai manufacturers. Having raw ingot fusion, CNC lathe flame forming, cleanroom optical polishing, and certified class-1000 packaging in a single facility reduces procurement lead times by 35% to 50% while guaranteeing full traceability.
Frequently Asked Questions: B2B Quartz Procurement
Practical technical and logistical answers for procurement managers, chemical plant designers, and laboratory directors.