Machined from raw high-crystallinity Donghai feedstock utilizing multi-axis CNC diamond grinding, laser slotting, and flame polishing.
A material analysis on structural stability, dielectric strength, and microscopic dislocation control for high-temperature vacuum isolation.
| Physical / Chemical Parameter | JGS1 (Synthetic Silica) | JGS2 (Optical Grade) | JGS3 (Infrared Fused Quartz) | Test Standard Reference |
|---|---|---|---|---|
| SiO₂ Purity Level | ≥ 99.999% (<1 ppm metals) | ≥ 99.98% | ≥ 99.99% | ICP-OES Mass Spectrometry |
| Spectral Transmission Domain | 185 nm – 2500 nm (Deep UV) | 220 nm – 2500 nm (UV-Vis) | 260 nm – 3500 nm (Low OH⁻ IR) | Spectrophotometer D65 |
| Thermal Expansion Coeff. (CTE) | 5.5 × 10⁻⁷ / °C (20–320°C) | 5.5 × 10⁻⁷ / °C | 5.4 × 10⁻⁷ / °C | ASTM E228 Dilatometry |
| Continuous Operating Temp. | 1150 °C | 1100 °C | 1100 °C | DIN 52324 Furnace Soaking |
| Softening Point / Annealing Point | 1730 °C / 1215 °C | 1683 °C / 1210 °C | 1680 °C / 1200 °C | Fiber Elongation Method |
| Dielectric Strength (20°C, 1MHz) | 25–40 kV/mm | 25–35 kV/mm | 25–35 kV/mm | IEC 60243-1 Standard |
Due to its tetrahedral crystalline-amorphous network and negligible coefficient of thermal expansion (5.5 × 10⁻⁷/°C), a Zunex fused quartz glass ring can endure cyclic thermal spikes from 1100°C directly down to 20°C aqueous immersion without experiencing micro-cleavage or catastrophic spalling.
By using nanosecond CO₂ and picosecond green laser trepanning stations, we produce stepped quartz retaining rings, gas-distribution porous quartz showerhead rings, and wafer clamping rings with edge chips strictly restricted to < 0.05 mm, surpassing standard diamond lapidary methods.
The pure vitreous silica matrix exhibits extreme chemical indifference toward aqua regia, concentrated hydrochloric, nitric, and sulfuric acids even at boiling points. This makes our quartz rings a vital barrier component in corrosive chemical processing reactors where borosilicate glasses fail.
Addressing the rigorous metallurgical, maritime, chemical, and academic research challenges across Eastern Coastal industrial facilities.
High-temperature smelting and induction furnaces operating around the Port of Wonsan depend on heavy-walled fused quartz observation rings to maintain pressure seals while allowing continuous optical pyrometer telemetry at temperatures exceeding 1000°C.
Coastal marine research, seawater cracking, and electrochemical cells leverage quartz insulating rings for their absolute resistance to halogen corrosion, eliminating the chloride pitting common to duplex stainless alloys and ceramics.
Industrial aquaculture facilities around the Wonsan coastal belt employ high-efficiency UV-C discharge lamps fitted with high-transmission JGS2 quartz concentric jacket rings, delivering over 90% transmission at the crucial 254 nm germicidal peak.
Institutes and analytical testing laboratories utilize custom ground-joint quartz adapter rings and furnace process tubes for chemical vapor transport, carbon residue combustion tests, and high-vacuum catalyst calcination protocols.
How modernization programs, import substitution, and tighter environmental standards drive the demand for high-spec fused quartz components.
Engineers in Wonsan are systematically replacing conventional 3.3 borosilicate glass rings with fused quartz in high-heat apparatus. Borosilicate glasses soften around 520°C, causing frequent seal failures during thermal overshoots, whereas fused quartz remains rigid up to 1100°C, significantly reducing plant downtime.
Industrial buyers are moving away from intermediaries and standard catalogue sizes. Instead, they increasingly provide parametric CAD drawings directly to manufacturing hubs like Donghai, securing custom wall thicknesses, polished O-ring seats, and counterbored mounting holes at competitive direct-factory costs.
Because maritime and overland freight into the regional economic corridor can cause mechanical shocks, buyers prioritize suppliers who utilize custom-molded EPE foam, vapor barrier seals, and reinforced composite crates to ensure zero breakage upon arrival.
Based in Donghai County—the world’s premier crystal and silica processing hub—we combine certified raw material purity with precision CNC fabrication.
Every drawing submitted is assessed by a dedicated quartz processing engineer for thermal tolerance, manufacturability, and tool clearances, delivering quotes with material certifications in 2 hours or less.
Our workshop houses high-temperature hydrogen-oxygen lathe welding stations, diamond cylindrical grinders, double-sided chemical-mechanical polishers (CMP), and laser drilling machines under one roof.
Our credentials are verified through independent trade channels, reflected in an annual export volume of US$2.5M to US$5M and an industry-leading repeat-order rate of 43% from global industrial buyers.
Every quartz glass ring, cylinder, and tube is wrapped in static-free protective film, nested in custom high-density shock-absorbing foam, and packed inside drop-tested marine plywood export cases.
Answers to common technical, logistics, and quality assurance questions regarding our fused quartz glass products.
Using diamond tooling and CNC cylindrical grinding stations, we reliably achieve outer and inner diameter tolerances of ±0.05 mm, thickness tolerances of ±0.02 mm, and surface flatness within 1–3 light bands depending on part geometry.
Select JGS1 for deep UV applications (185–2500 nm), including excimer laser systems and photochemical reactors. JGS2 is ideal for standard sight windows, furnace viewports, and general optical uses. JGS3 has minimal hydroxyl (OH⁻) content (<5 ppm), making it the superior material for infrared instrumentation and heating systems operating up to 3500 nm.
Yes. Our precision quartz machining center provides CNC water-cooled ultrasonic milling and laser drilling. We regularly mill dovetail O-ring grooves, countersunk through-holes, edge bevels, and polished sealing lips to match your engineering drawings.
Thanks to a very low thermal expansion coefficient of 5.5 × 10⁻⁷/°C, our fused quartz rings can withstand rapid shifts from 1100°C to room temperature water without micro-fracturing. For maximum working life, continuous operation should remain below 1100°C, with short intermittent peaks acceptable up to 1300°C.
We use multilayer protective packaging. Individual rings are enclosed in cleanroom bags, placed within customized die-cut polyethylene foam compartments, and boxed in sturdy, palletized wooden export crates designed to handle marine and rail transit stresses.
Send your dimensional drawings (PDF, DWG, DXF, or STEP) along with your required quartz grade and tolerances. Our engineering team will review manufacturability and provide a quote within 2 hours.
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