What is the difference between JGS1, JGS2 and JGS3 fused quartz?

JGS1 is synthetic fused silica optimized for deep-UV transmission from about 185 nm and is used for UV optics and lasers. JGS2 is a fused quartz grade for UV-visible use from about 220 nm, common in windows, sight glasses and lamp covers. JGS3 is an IR-grade fused quartz with low hydroxyl content, transmitting up to about 3500 nm, used for infrared windows and thermal applications.

What temperature can your fused quartz products withstand?

Typical clear fused quartz can be used continuously at around 1100 °C and for short periods up to about 1450 °C. The softening point is approximately 1683 °C. Exact limits depend on wall thickness, thermal cycling and atmosphere, so we confirm suitability for each application.

Can you manufacture custom quartz parts from my drawings?

Yes. We provide OEM and ODM manufacturing of quartz tubes, plates, discs, flanges, boats, crucibles, bell jars, cuvettes and custom labware. Send a PDF, DWG or STEP drawing with grade, tolerance, surface finish and quantity requirements to info@nivraquartz.com.

What is the minimum order quantity?

Many standard items start from 1 to 10 pieces, while small precision wafers and discs typically start from 50 to 100 pieces. Low-volume prototypes and sample orders are welcome before mass production.

How do you pack fragile quartz glass for international shipping?

Each part is cleaned, individually wrapped and fixed in shock-absorbing foam inside export cartons or fumigation-free wooden cases. Long tubes and rods are shipped in reinforced crates to prevent bending stress and breakage.

How quickly will I get a reply to my technical inquiry?

Our average response time is within 5 hours, with a measured response rate of 88.89%. Engineering questions on drawings and tolerances are answered by staff experienced in quartz processing.

China Wholesale High Purity Quartz Factories & Exporter

Featured High Purity Quartz OEM/ODM Product Portfolio

Directly manufactured in Donghai, Jiangsu—China's crystal capital—our fused quartz products offer ≥99.99% SiO2 purity, outstanding thermal shock resistance, and ultra-low bubble density for demanding industrial applications.

Clear Quartz Spiral Tube for Optics Laboratory Use with Moulding and Bending Services

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220V 700W 300MM 10mm Diameter Infrared Heating Tube Carbon Fiber/Halogen/Graphene Tube

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Precision Machined Fused Quartz Ring for Semiconductor & Thermal Processing

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Clear Fused Quartz Glass Sheet for Optics and Photovoltaics

Wholesaler Customized High Quality Clear Fused Quartz Glass Sheet for Optics & PV

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High Temperature Laboratory Fused Silica Quartz Glass Flask & Analytical Vessels

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Polished Clear Quartz Wafer Carrier Boat

Customized Clear Fused Silica Quartz Boat Polished Quartz Wafer Carrier

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Translucent Opaque Milky White Quartz Glass Tube

Translucent Quartz Glass Pipe & Opaque Milky White High-Temp Insulation Tube

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Ultra Clear High Purity Optical Grade Quartz Sheet & Substrate

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Enterprise Strength & Donghai Regional Quartz Cluster Advantage

Donghai County Nivra Quartz Products Co., Ltd.

Leading OEM/ODM Manufacturing Facility in China's Silicon Capital

Established in Donghai County, Lianyungang City, Jiangsu Province—globally acknowledged as the premier hub for quartz raw materials and precision thermal glass processing—Donghai County Nivra Quartz Products Co., Ltd. operates state-of-the-art cutting, grinding, optical polishing, laser drilling, and flame-working facilities. Backed by an experienced workforce of over 100-200 specialized technicians, we deliver certified high-purity quartz apparatus engineered to satisfy stringent global OEM standards across North America, Western Europe, and East Asia.

≥ 99.99%

SiO2 Ultra Purity

1100 °C

Continuous Working Temp

≤ 5 Hours

Average Response Time

88.89%

Inquiry Conversion Rate

Rigorous E-E-A-T Quality Assurance & Material Verification

In high-tech semiconductor fabrication and high-precision optics, material contamination can lead to catastrophic yield failures. Nivra Quartz implements strict spectrographic and dimensional inspections at every production stage:

Raw Silica Selection: Sourced directly from local high-purity pegmatite quartz deposits in Donghai, minimizing metallic impurities (Fe ≤ 1.0 ppm, Al ≤ 15 ppm, Na ≤ 1.0 ppm, K ≤ 1.0 ppm).
Flame-Working & Lathe Precision: Advanced automated hydrogen-oxygen flame lathes ensure uniform wall thickness and thermal stress elimination via controlled annealing up to 1150°C.
Surface Finish & Flatness: Optical grade discs and sheets undergo double-sided mechanical-chemical polishing, achieving surface roughness Ra < 0.5 nm and flatness of λ/4 per inch.
Export-Grade Protective Packaging: Custom-molded shock-absorbing EPE foam, vacuum sealing, and fumigation-free wooden crates guarantee zero breakage during ocean and air freight.

Material Science & Technical Specifications Guide

Selecting the proper grade of fused quartz or synthetic silica is critical for thermal stability, optical transmittance, and chemical longevity. The table below provides a engineering comparative overview across standard industrial grades.

Quartz Grade Designation	Spectral Transmission Range	Hydroxyl Content ([OH-])	Primary Industrial Applications	Key Performance Attribute
JGS1 (Synthetic Fused Silica)	185 nm – 2,500 nm (Deep UV)	< 5 ppm (Low OH) or High UV Opt.	Deep-UV Lithography, Laser Optics, Cuvettes	Bubble-free, supreme UV transparency down to 185nm
JGS2 (Fused Quartz from Crystal)	220 nm – 2,500 nm (UV-Vis)	< 30 ppm to 150 ppm	Sight Glasses, Furnace Tubes, Photovoltaics	Cost-effective, robust mechanical & thermal stability
JGS3 (Infrared Grade Fused Quartz)	260 nm – 3,500 nm (Infrared)	< 5 ppm (Water-free IR Grade)	IR Spectrometry, Thermal Imaging, Pyrometry	No absorption band at 2.73 μm; excellent IR transmission
Milky White / Opaque Quartz	Thermal Diffusion Only	N/A (Micro-porous Structure)	Flanges, Furnace Muffles, Insulation Ring	High thermal insulation, uniform heat dispersion
Single Crystal Sapphire (Al2O3)	170 nm – 5,500 nm (DUV to Mid-IR)	N/A	Extreme Wear Windows, Pressure Ports, Watches	Mohs Hardness 9, extreme chemical inertness & pressure resistance

Future Sourcing & Global Procurement Trends in Quartz Glass

As semiconductor node shrinkages continue and green energy industries expand, international procurement strategies for raw and fabricated high-purity quartzware are undergoing pivotal shifts.

Semiconductor 3nm Node Shift

Ultra-Trace Contamination Controls

Next-generation chip fabrication requires quartz component manufacturers to guarantee parts-per-billion (ppb) level purity. Sourcing directors are prioritizing factories equipped with ISO Class 5 cleanrooms and advanced acid-etching washing lines to eliminate trace alkali metals.

PV TOPCon & HJT Expansion

Large-Diameter Quartz Crucible Demand

Solar wafer manufacturers are shifting towards 36-inch and 40-inch high-purity synthetic-coated quartz crucibles to support continuous monocrystalline silicon ingot pulling, increasing operating lifespan and reducing solar cell efficiency degradation.

Supply Chain Optimization

Direct Factory OEM Prototyping

To shorten NPI (New Product Introduction) cycles, B2B buyers are bypassing intermediary trading entities in favor of direct Chinese factory partnerships capable of handling CAD/STEP files, multi-axis CNC machining, and low-MOQ rapid prototyping.

Advanced Manufacturing & Processing Technology Innovations

1. Precision CNC Diamond Machining & Laser Micro-Fab

Traditional manual glassblowing is increasingly integrated with 5-axis CNC grinding centers and picosecond laser drilling machines. This technical evolution enables complex custom geometries—such as micro-fluidic quartz chips, perforated gas dispersion tubes, and multi-grooved wafer carriers—with dimensional tolerances controlled strictly within ±0.005 mm.

2. Vacuum Thermal Annealing & Stress Elimination

Residual internal stresses in fused silica components can result in optical distortion or spontaneous cracking during high-temperature thermal cycling. Modern export-oriented factories implement multi-stage computer-controlled vacuum annealing furnaces up to 1200°C, ensuring polarized light birefringence values conform to strict optical testing specs.

3. Hybrid Heating Elements & Infrared Technology Integration

The industrial integration of carbon fiber, halogen, and graphene conductors within high-purity quartz sleeves has revolutionized rapid heating apparatus. Fused quartz delivers high infrared radiation efficiency, resistance to chemical corrosion from reactive gases, and thermal shock tolerance across rapid ON/OFF power cycles.

Frequently Asked Sourcing & Technical Questions (FAQ)

Answers to key engineering and procurement inquiries regarding material selection, tolerances, custom manufacturing, and global delivery logistics.

What is the fundamental difference between JGS1, JGS2, and JGS3 fused quartz materials?

JGS1 is synthetic fused silica made from silicon tetrachloride feedstock; it delivers superior deep-UV transmission (≥85% at 193 nm) and is virtually free of bubbles and impurities. JGS2 is synthesized from high-purity natural crystal sand, offering excellent light transmission from 220 nm to 2,500 nm, making it the industry standard for optical windows, sight glasses, and semiconductor tubes. JGS3 is a specialized infrared grade fused quartz processed under vacuum to eliminate hydroxyl ions ([OH-] < 5 ppm), preventing absorption peaks in the 2.73 μm band and enabling high IR transparency up to 3,500 nm.

What continuous temperature limits can fused quartz products withstand without devitrification?

Clear fused quartz features a softening point of approximately 1683°C. It can be operated continuously at temperatures up to 1100°C, and intermittently up to 1450°C. Long-term exposure above 1150°C in the presence of surface contaminants or alkali trace elements can initiate surface devitrification (transformation to cristobalite). Clean handling and proper thermal ramp rates are recommended.

Can Donghai Nivra Quartz fabricate custom apparatus according to customer CAD/STEP drawings?

Yes. As a direct manufacturer and exporter, over 70% of our production consists of custom OEM/ODM components. We accept technical drawings in PDF, DWG, DXF, and STEP formats. Our engineering team conducts manufacturability reviews, confirming wall thickness, tolerance capability (±0.01 mm to ±0.005 mm for precision ground optics), and surface polishing specifications prior to sample fabrication.

What are the typical Minimum Order Quantities (MOQ) and sample lead times?

For standard quartz tubing, rods, and basic laboratory glassware, our MOQ starts from 1 to 10 pieces. For precision CNC-machined optical wafers, custom quartz boats, or specialized sapphire windows, typical initial sample runs range from 10 to 50 pieces. Sample lead times are generally 5 to 9 working days depending on structural complexity and coating specifications.

How does your factory protect fragile quartz glass items during international shipping?

Every fabricated part undergoes ultrasonic washing and drying before wrapping in dust-free protective film. Products are nested in custom-cut, shock-absorbing EPE foam matrices within reinforced multi-wall corrugated cartons or fumigation-free plywood crates. Long tubes and large crucibles are anchored with rigid perimeter cushioning to prevent mechanical shear stress during transit.

What documentation and quality certifications accompany high-purity export shipments?

Upon buyer request, shipments are accompanied by Material Test Reports (MTRs), Spectrophotometer Optical Transmission Curves, ICP-OES Element Trace Analysis (certifying metal ppm purity), Certificate of Conformance (CoC), and dimensional inspection sheets.