Precision Optical Quartz & Thermal Components
Engineered from Donghai's purest 99.99% fused silica and quartz ingots. Fabricated with micron-level CNC machining, planetary flame polishing, laser core drilling, and cryogenic annealing for heavy industrial deployments across Nampo.
High Temperature Resistance Frosted Quartz Disc/Plate Semiconductor Applications Welding Cutting Custom Sizes Fused Quartz
High Quality Transparent U-Bent Quartz Glass Tube Bending/Cutting/Welding Services 99.99% Pure Quartz Ozone Free Polished
Open Ended Fused Quartz Frosted Glass Cylinder Ingot with Moulding Welding Cutting Services Custom Sizes for Optics Applications
Customizable High Pressure High Quality Polished Clear Transparent 99.99% Pure Quartz Glass Twin Tube Bending/Welding/Cutting
Factory Custom High Pressure 99.99% Pure Quartz Glass Tube Bending/Welding Ozone Free Polished Surface
Customized High-purity Quartz Glass Reactor Container Bending Moulding Photocatalytic Degradation Internal Illumination Welding
Factory Custom Both Ends Polished High Purity Transparent Quartz Twin Tube Bending Moulding Welding Cutting Capabilities
Manufacturers Customized Fused Quartz Glass High Temperature Resistant Circular Cylinder Crucible Tank Welding Cutting Custom
Engineering Synthetic Fused Silica & Optical Quartz Lenses
When industrial applications outpace standard borosilicate or soda-lime glass, fused quartz () provides unmatched optical transmission, laser damage resistance, and extreme thermal resilience. Our manufacturing standards adhere to Chinese Optical Standards JGS1, JGS2, and JGS3 (equivalent to Corning 7980, Suprasil, and Infrasil grades).
JGS1 – Deep UV Synthetic Silica
Synthesized via chemical vapor deposition ( oxidation). High hydroxyl ( > 800-1200 ppm) suppresses color center formation under high-flux UV radiation.
- Spectral Range: 185 nm – 2500 nm
- Peak Transmittance: > 90% @ 200 nm
- Bubble Class (ISO 10110): 0/10 (Zero Inclusions)
- Key Use: Excimer Optics, Laser Cutting Lenses
JGS2 – Standard Fused Quartz
Electrochemically fused high-purity natural crystal sand from Donghai deposits. Balanced optical transparency from UV through Near Infrared ( approx. 150-200 ppm).
- Spectral Range: 220 nm – 2500 nm
- Refractive Index (Nd): 1.4585
- Thermal Shock Gradient: ΔT = 1000°C Quench Safe
- Key Use: Industrial Sight Glasses, Marine Optics
JGS3 – Infrared Grade Quartz
Vacuum electric furnace melted crystal sand. Virtually hydroxyl-free ( < 2-5 ppm), eliminating the destructive 2.73 μm water absorption band in the infrared.
- Spectral Range: 260 nm – 3500 nm
- IR Transmission (2.73 μm): > 85% Transmission
- Laser Damage Threshold: > 12 J/cm² @ 1064nm, 10ns
- Key Use: Pyrometric Windows, Thermal Cameras
| Physical / Optical Parameter | JGS1 (Synthetic Fused Silica) | JGS2 (Optical Grade Fused Quartz) | JGS3 (Low-OH Infrared Quartz) | Test Standard / Metrology |
|---|---|---|---|---|
| SiO₂ Chemical Purity | ≥ 99.999% | ≥ 99.99% | ≥ 99.99% | ICP-OES / GD-MS |
| Refractive Index (nd @ 589.3 nm) | 1.45846 | 1.45850 | 1.45848 | V-Block Pulfrich Spectrometer |
| Abbe Number (vd) | 67.8 | 67.6 | 67.7 | Optical Dispersive Calculation |
| Thermal Expansion Coeff. (20-300°C) | 0.54 × 10⁻⁶ K⁻¹ | 0.55 × 10⁻⁶ K⁻¹ | 0.55 × 10⁻⁶ K⁻¹ | Dilatometry (ASTM E228) |
| Softening / Annealing Point | 1600°C / 1120°C | 1683°C / 1215°C | 1710°C / 1220°C | Fiber Elongation Method |
| Surface Figure / Wavefront Distortion | λ/10 to λ/4 @ 632.8 nm | λ/4 to λ/2 @ 632.8 nm | λ/4 to 1λ @ 632.8 nm | Zygo Laser Interferometer |
| Surface Quality (Scratch-Dig) | 10-5 to 20-10 (Laser Polished) | 40-20 to 60-40 (Precision Optical) | 40-20 to 60-40 (Precision Optical) | MIL-PRF-13830B / ISO 10110 |
| Laser Induced Damage (LIDT) | > 15 J/cm² (1064nm, 10ns) | > 8 J/cm² (1064nm, 10ns) | > 10 J/cm² (1064nm, 10ns) | ISO 21254 Single/Multi Shot |
Optical Quartz Lens Solutions in the Nampo Industrial Corridor
Nampo serves as a critical maritime gateway and industrial production base along the West Sea, encompassing major port logistics, ship repair yards, metallurgical smelting plants, petrochemical storage facilities, and high-temperature thermal power installations. These harsh coastal and industrial environments demand optical components that withstand aggressive saline corrosion, violent thermal swings, and high-pressure chemical exposure.
Shipbuilding & Marine Heavy Fabrication
Shipyard automated CNC fiber-laser cutting stations (6kW to 20kW) in the Nampo maritime district utilize our high-purity JGS1 fused silica plano-convex lenses, protective focus cover slides, and collimating lenses. Unmatched low thermal lensing ensures laser spot positioning accuracy when cutting heavy hull plate steel.
Petrochemical & Refinery Viewports
Nampo port chemical terminals and storage tanks require explosion-resistant, optical sight glasses capable of handling severe acidic vapors () and extreme hydrostatic pressures up to 10 MPa. Our double-disk polished quartz plates prevent pitting and maintain high optical clarity for process video inspection.
Blast Furnace & Smelter Pyrometry
Metallurgical processing plants in neighboring smelting zones rely on non-contact infrared pyrometer sight lenses fabricated from JGS3 low-OH quartz. They endure relentless radiative heat (>1200°C) and hot cinder impingement without spalling, transmitting real-time infrared spectra directly to thermal sensors.
Marine Navigation & Harbor Port Lidar
Automated gantry cranes, container positioning telemetry, and maritime lighthouse optics at Nampo Port utilize precision cylindrical and aspheric quartz lenses. Their immunity to coastal salt-spray clouding, abrasive marine fog, and wide temperature swings ensures continuous harbor logistics.
Photocatalytic Coastal Water Purification
Municipal and industrial wastewater treatment complexes near the Taedong River basin use our custom quartz reactor containers and high-transmittance UV sleeves. Operating under deep UVC wavelengths (254 nm and 185 nm), they maintain 90%+ UV transmission for ozone water disinfection.
Materials Research & Spectral Analysis Labs
University labs and state analytical facilities in the municipal region deploy our high-purity fused quartz XRD sample holders, BET adsorption quartz bulbs, and fluorescence spectrophotometer cuvette windows, delivering zero background fluorescence and uncompromised chemical purity.
Key Procurement Trends in Nampo's Industrial Optics Market
The procurement dynamics for optical glass and quartz substrates across East Asian industrial ports are undergoing three critical engineering transformations:
1. Transition from Borosilicate to Fused Quartz
Industrial factories throughout the Nampo shipping and chemical cluster are actively replacing legacy borosilicate sight glass discs with fused quartz. High-intensity chemical reactions and higher-pressure boiler manifolds often exceed borosilicate's 230°C thermal limit, whereas fused quartz operates safely up to 1100°C with negligible thermal shock risk.
2. Scaling Fiber Laser Power (12kW – 30kW)
Marine heavy industries and structural steel preparers are adopting ultra-high-power fiber cutting systems. Standard optical substrates develop thermal drift and focal shift under high power density. JGS1 synthetic silica lenses, finished with super-polished surfaces (Ra < 0.5 nm), offer laser damage thresholds exceeding 15 J/cm².
3. Demand for Integrated Drawing-Based Customization
Industrial buyers are shifting away from generic off-the-shelf catalog optics toward custom engineered shapes. Modern designs require integrated stepped rims, counter-sunk O-ring grooves, laser-engraved fiducials, and hermetic metal-to-quartz solder-metallization rings for direct chamber bolting.
Why Engineering Teams Choose Zelvo Quartz
Headquartered in Donghai County, Jiangsu – known as China's "Crystal Capital" and the global epicenter for fused quartz raw materials – Lianyungang Zelvo Quartz Products Co., Ltd. combines geographic raw material purity with precision CNC optical manufacturing.
Crystal Capital Heritage
Direct sourcing from high-purity Donghai silica deposits guarantees SiO₂ content ≥ 99.99%, low transition metals (Fe < 0.8 ppm), and zero gas inclusions.
Full Precision Machining
5-axis ultrasonic CNC milling, diamond wheel beveling, laser drilling, slotting, and double-sided planetary optical polishing down to surface roughness Ra < 0.5 nm.
1-Piece Prototyping MOQ
No minimum order barriers for custom engineering drawings. We build 1-piece prototypes for custom optical assemblies, sight glasses, or R&D experimental chambers.
Rapid ≤ 2-Hour Response
Dedicated sales engineers provide Design-for-Manufacturability (DFM) reviews, optical material selection guidance, and detailed formal quotes in under 2 hours.
Our 5-Stage Zero-Defect Optical Quality Gate
Frequently Asked Questions by Industrial Buyers in Nampo
Addressing technical parameters, surface finishes, material selections, and international maritime delivery options for buyers and procurement leads.
What are the key functional differences between JGS1, JGS2, and JGS3 quartz lenses?
Can Zelvo Quartz fabricate custom quartz lenses based on our 2D/3D CAD drawings?
What optical coatings (anti-reflective AR, protective) are available for marine environments?
How do fused quartz viewports perform under high pressure and thermal cycling?
What are your minimum order quantities (MOQ) and sample lead times?
What logistics, protective packaging, and international trade terms do you support?
Request an Engineering Review & Quotation
Send us your part dimensions, optical requirements, operating temperatures, or CAD files. Our senior quartz engineering team will review your specifications and provide a detailed DFM analysis and formal quotation within 2 hours on business days.