- Manufacturer + Exporter
- Custom to Drawing
- JGS1 / JGS2 / JGS3 Grades
- Safe Export Packing
Quartz Glass Engineered in China's Crystal Capital
Zunex Quartz Products Co., Ltd. is a manufacturer and trading company based in Donghai County, Jiangsu — a region renowned for its quartz and crystal industry. We develop and produce high-quality optical quartz glass sheets, sapphire sheets, quartz tubes, quartz rods, quartz boats, quartz beakers and laboratory quartz instruments.
Our specialty is quartz laser finishing — precision drilling, grooving and cutting — combined with custom fabrication from customer drawings. Every inquiry is reviewed by an engineer who checks material grade, tolerance and processing route before quoting, so you receive parts that fit your process the first time.
- Processing to your drawing
- Laser drilling, grooving & cutting
- Optical & IR-grade materials
- Small batches & prototypes welcome
| Business Type | Manufacturer, Trading Company |
|---|---|
| Location | Donghai County, Jiangsu, China |
| Total Employees | 11 – 50 People |
| Annual Revenue | US$2.5 Million – US$5 Million |
Core Quartz Glass Product Lines
Four production lines covering most industrial and laboratory quartz requirements — each available in standard sizes or fully customized.
Quartz Glass Tube
Clear, opaque and high-purity tubes for furnaces, heaters, UV lamps and combustion analysis.
View TubesQuartz Glass Plate
Optical windows, polished discs and wafers in JGS1, JGS2 and JGS3 grades.
View PlatesQuartz Glass Rod
Solid fused quartz rods for light guides, supports, stirrers and fabrication stock.
View RodsLaboratory Instrument
Quartz beakers, crucibles, boats, cuvettes and sample tubes for research labs.
View LabwarePrecision Quartz Parts Built for Demanding Processes
From semiconductor diffusion to UV optics, choose the form factor and grade — we machine the details.
Best SellerHigh-Temperature Quartz Tubes
Open-end, closed-end, flanged and U-bent tubes for tube furnaces, CVD and infrared heaters.
Optical GradeOptical Quartz Plates & Windows
Double-side polished plates, discs and wafers with laser-drilled holes or grooves on request.
Lab ReadyLaboratory Quartzware
Beakers, crucibles, combustion boats and BET sample tubes for chemical and material analysis.
Fused Quartz Rods
Ground or fire-polished rods for light transmission, sensor supports and further fabrication.
Quartz Boats & Carriers
Slotted wafer boats and carriers built for diffusion, oxidation and cleaning processes.
Sapphire Sheets & Special Parts
Sapphire windows and special-shaped quartz components for harsh or high-wear environments.
Fused Quartz Properties & Grade Selection
Use these reference values to shortlist the right material before sending your RFQ. Exact values depend on grade and are confirmed on each quotation.
| Property | Typical Value |
|---|---|
| SiO₂ content | ≥ 99.98% (high-purity grades ≥ 99.99%) |
| Density | 2.20 g/cm³ |
| Softening point | approx. 1683 °C |
| Annealing point | approx. 1215 °C |
| Working temperature | ~1100 °C continuous / ~1300 °C short term |
| Coefficient of thermal expansion | 5.5 × 10⁻⁷ /°C |
| Refractive index (589 nm) | 1.4585 |
| Mohs hardness | 5.5 – 6.5 |
Reference data for general fused quartz; contact us for grade-specific certificates.
JGS1 Deep UV
Synthetic fused silica with excellent transmission from about 185 nm to 2500 nm. Ideal for UV lithography optics, excimer laser windows and spectroscopy cuvettes.
JGS2 UV – Visible
Fused quartz transmitting roughly 220–2500 nm. A cost-effective choice for sight glasses, UV lamp covers and general optical windows.
JGS3 Infrared
Low-hydroxyl fused quartz transmitting up to about 3500 nm, suited to IR heaters, IR optics and high-temperature viewports.
A Quartz Partner Built Around B2B Buyers
Global Logistics
Shock-proof foam and wooden-case packing for fragile quartz, shipped by express, air or sea to your door.
OEM / ODM
Production to your drawings or samples, from single prototypes to repeat batch orders.
Engineering Support
Material, tolerance and process advice from engineers, with replies typically within two hours.
Quality Control
Dimensional and visual inspection of bubbles, inclusions and polish before every shipment.
Where Our Quartz Glass Performs
Fused quartz combines purity, heat resistance and optical clarity — the reason it is specified across these sectors.
Semiconductor
Diffusion tubes, wafer boats, bell jars.
Solar Photovoltaic
Furnace tubes and carriers for cell lines.
Infrared Heating
Heater tubes and twin-tube emitters.
Electronic Information
Substrates, windows and insulating parts.
Aerospace
High-temperature viewports and optics.
Chemical Processing
Acid-resistant reaction vessels and tubes.
Research Institutes
BET tubes, XRD holders, ampoules.
UV & Lighting
UV lamp sleeves and optical covers.
From Drawing to Delivery in 5 Steps
A transparent process so procurement and engineering teams know exactly what happens after an RFQ.
Send Drawing
Share PDF/DWG/STEP files, grade, tolerances and quantity.
Engineering Review
We confirm manufacturability and recommend material grade.
Fabrication
Hot forming, cold machining, polishing and laser finishing.
Inspection
Dimension, transparency and defect checks with photos.
Export Packing
Protective packing and worldwide shipment with tracking.
Inside Our Quartz Workshop
Real production photos from our Donghai facility — where hot working, cold processing and inspection happen under one roof.
Laser Finishing
Precision drilling, grooving and cutting of quartz plates and tubes with clean edges and minimal micro-cracking.
Inspection Center
Every part is checked for size, bubbles, inclusions and surface quality before packing.
Independent Trade Records You Can Check
Transparency builds long-term partnerships. Review our third-party verified records on Alibaba.com.
Questions Buyers Ask Most
Can Zunex produce quartz parts according to my drawing?
What is the difference between JGS1, JGS2 and JGS3 quartz?
What temperature can fused quartz glass withstand?
Which finishing processes do you offer?
How fast do you respond to technical inquiries?
Have a Drawing or Spec Sheet?
Tell us the grade, dimensions and quantity. An engineer will review it and reply within about two hours.
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