High-Temperature Optics Grade Fused Quartz Glass Plate
JGS1 / JGS2 / JGS3
0.5 - 100mm Thickness
λ/4 Surface Flatness
Certified Production Catalog
Precision Fused Silica Glass Fabrications & Custom Optics
Engineered in Donghai County—China's crystal industrial center—to meet stringent semiconductor fab thermal specifications, excimer laser thresholds, and chemical vacuum containment.
Polished Clear Twin-Tube Ozone-Free Furnace Heater
Dual-Bore Geometry
High Radiation Yield
Thermal Shock Proof
Custom Optical Test Sample Sheet & Substrate
Deep-UV Transmission
Laser Cut Edges
Double-Sided Polish
1100°C High-Temp Clear Fused Quartz Sight Window
Continuous 1100°C
Low Thermal Expansion
Hydroxyl Controlled
High-Pressure Fused Silica Semiconductor Wafer
Ra < 0.5nm Roughness
TTV < 2μm
Ultra-Low Bubble Class
Custom U-Bent & Helical Spiral Quartz Heat Tube
Hydro-Formed Bends
Zero-Stress Annealed
Uniform Wall Caliber
99.99% High-Purity Quartz Light Guide Cylinder Rod
>93% Internal Transmission
Total Internal Reflection
Fire Polished Endfaces
High-Purity Flanged Fused Silica Furnace Tube
Ground Flange Mating
Ultra-Vacuum Sealed
O-Ring Grooves Integrated
Why Source from Zunex Quartz
Verified Direct Manufacturing from China’s Quartz Heartland
Combining proprietary high-temperature hydrogen-oxygen flame refining, 5-axis CNC ultrasonic diamond grinding, and cleanroom vacuum packaging.
Native Raw Material Purity
Directly headquartered in Donghai County, we leverage premier high-purity natural silica sand (≥99.99% SiO2) and vapor-synthesized silicon tetrachloride precursors to eliminate metallic contaminants.
Micron-Level Laser Finishing
Equipped with state-of-the-art CO2 and femtosecond laser processing setups to execute micro-hole drilling (Ø<0.2mm), edge beveling, micro-fluidic grooving, and crack-free wafer cutting.
CAD/Drawing FEA Feasibility
100% of incoming customer engineering schematics (DWG, STEP, DXF, PDF) undergo rapid DFM (Design for Manufacturability) verification within 2 hours, preventing structural thermal fatigue downline.
Zero-Breakage Global Logistics
Every fragile fused quartz assembly is shielded with vacuum poly-wrap, bespoke CNC cut-to-fit EVA shock-absorbing foam, and heavy-duty multi-layer fumigated wooden export crating.
100%
Verified Response Rate
Within 2 hours average reply
43%
Repeat Procurement Rate
Tier-1 OEM & lab accounts
≥1100°C
Working Temperature
Peak threshold 1300°C short-term
≤0.5nm
Surface Roughness (Ra)
EUV/UV laser optic finish
Engineering Whitepaper Guide
Fused Silica vs. Fused Quartz: Material Standards & Selection
A comprehensive technical comparison to assist optical engineers, vacuum furnace builders, and chemical apparatus designers in specifying the exact glass matrix.
| Physical / Thermal Parameter | Standard Value | Test / Inspection Standard |
|---|---|---|
| Chemical Purity (SiO2) | ≥ 99.99% (Electronic Grade ≥ 99.999%) | ICP-OES / GD-MS Spectrometry |
| Density (ρ) | 2.20 ± 0.02 g/cm³ | Archimedes Immersion Method |
| Softening Point | 1683 °C ± 15 °C | ASTM C338 Standard |
| Annealing Point | 1215 °C ± 10 °C | ASTM C336 Standard |
| Strain Point | 1120 °C ± 10 °C | Beam-Bending Viscosimeter |
| Linear Expansion Coeff. (CTE) | 5.5 × 10-7 / °C (20°C - 320°C) | Dilatometric Interferometry |
| Thermal Shock Resistance | Drop from 1100°C into 20°C water without crack | Rapid Quench Test |
| Dielectric Strength (20°C, 1MHz) | 25 - 40 kV/mm | IEC 60243-1 High Voltage Test |
| Refractive Index (nd @ 589.3 nm) | 1.45846 | Abbe Refractometry |
China National Optical Glass Classification
JGS1 — Synthetic Deep-UV Fused Silica (185nm – 2500nm)
Produced by chemical vapor deposition of SiCl4. Virtually free of bubbles and metallic impurities. Ideal for excimer stepper optics, UV photolithography windows, laser mirrors, and fluorescence spectroscopy cuvettes.
JGS2 — Optical Grade Fused Quartz (220nm – 2500nm)
Smelted from purified natural crystalline silica under oxy-hydrogen flame. Delivers high visual transmission across UV-Vis spectrum. Preferred for sight glasses, UV curing lamps, and semiconductor diffusion tubes.
JGS3 — Infrared Grade Fused Quartz (260nm – 3500nm)
Vacuum-melted quartz glass with strictly suppressed hydroxyl content (OH ≤ 2 - 5 ppm). Eliminates the destructive 2.73μm OH absorption band. Designed for short-wave/medium-wave IR heaters and thermal imagers.
Market & Supply Chain Intelligence
Future Procurement Trends & Technological Evolution
Key technical shifts shaping fused silica sourcing in the semiconductor wafer fabrication, quantum communications, and renewable energy sectors through 2026-2030.
Sub-Nanometer Roughness for EUV
As semiconductor lithography nodes advance past 3nm and gate-all-around (GAA) architectures scale, demand for ultra-flat fused silica wafer carriers and EUV pellicle substrates has accelerated.
- Shift toward Magnetorheological Finishing (MRF) polishing.
- Sub-angstrom surface roughness (Ra ≤ 0.2 nm) requirements.
- Zero-striae and zero-bubble class (Class 0 per ISO 10110).
Large-Format Vacuum Furnace Hardware
Photovoltaic N-type TOPCon/HJT cell expansions and third-generation SiC/GaN power electronics necessitate oversized quartz furnace tubes and flanged reactors with extreme dimensional stability.
- Outer diameters exceeding 450mm with wall thickness runout < 0.3mm.
- Robotic flame welding avoiding localized devitrification.
- Prolonged creep-resistance under continuous 1150°C load cycles.
Agile Low-Volume On-Demand Sourcing
Global R&D centers and high-mix low-volume (HMLV) semiconductor test facilities are replacing massive inventory stockpiles with direct-to-factory precision digital machining.
- Immediate CAD-to-laser processing eliminating tooling turnaround.
- Traceable batch inspection reports with certified interferometry scans.
- Express consolidated door-to-door global air transit within 5-7 days.
Procurement Advisory
Frequently Asked Questions on Sourcing Fused Silica from China
Direct technical answers addressing material integrity, machining tolerances, thermal stress, and quotation workflows.
What is the actual chemical difference between Fused Quartz and Fused Silica?
While often used interchangeably, "Fused Quartz" is typically produced by melting natural, high-purity crystalline quartz rock (SiO2 content approx. 99.99%). In contrast, "Synthetic Fused Silica" (such as JGS1) is synthesized chemically using silicon tetrachloride (SiCl4) gas in a flame hydrolysis process. Synthetic fused silica boasts superior deep ultraviolet transmittance down to 185 nm and virtually zero heavy metal impurities (Fe, Al, Ti < 0.1 ppm).
How does Zunex prevent devitrification (crystallization) at 1100°C+?
Devitrification occurs when surface alkaline impurities (sodium, potassium, calcium) act as nucleation sites to convert amorphous silica into cristobalite. We prevent this by conducting ultra-pure deionized water ultrasonic washings, acid etching (hydrofluoric-nitric blend) to strip all surface micro-contaminants, and high-purity annealing cycles before vacuum packaging.
What tolerances can your laser drilling and CNC machining hold?
For custom quartz windows, discs, and diffusion tubes, our standard CNC milling and laser finishing holds outer diameter/length tolerances within ±0.05 mm. For high-precision semiconductor wafers and optical viewports, we routinely achieve dimensional tolerances of ±0.01 mm, parallelism < 10 arcseconds, and surface roughness Ra < 0.5 nm.
Can you provide custom flame-welded flanges and ground joints?
Yes. Our master glassblowers execute intricate hydrogen-oxygen lathe welding of NW/KF flanges, CF conflat flanges, twin-tube emitter assemblies, and spiral capillary coils. All weld junctions undergo fine-annealing in computer-controlled electric kilns to thoroughly relieve localized thermal hoop stresses.
How fast can custom prototypes and drawings be quoted?
With our verified 100% response rate on Alibaba and global trade portals, all engineering drawing submissions (PDF, CAD, DXF, or STEP) are reviewed by our senior technical team with formal DFM feedback and competitive factory-direct quotes issued within 2 hours.
How are breakages prevented during international express and air shipping?
Every single glass unit is cleanroom cleaned, wrapped in static-free surface film, nested inside custom CNC-routed high-density EVA foam cushions, and enclosed in double-wall reinforced cartons or customized plywood crates certified to ISTA-3A drop test criteria.
Ready to Validate Your Quartz Drawing or RFQ?
Contact our Donghai production engineering facility directly. Receive instant material guidance, tolerance evaluations, and tiered batch pricing within 2 hours.