One Material. Every Critical Industry.
FGQuartz high-purity quartz glass is used across six major industries: semiconductor, solar photovoltaic, optical, laboratory, fiber optic and high-temperature industrial. Each sector places distinct demands on purity, geometry, thermal and chemical performance — and we deliver dedicated solutions for all of them.
Est. 2005
Lianyungang, Jiangsu
40+ Countries
Global export network
6 Major Industries
Full application coverage
Full Custom
From prototype to production
Quartz Glass Across Every Critical Sector
Each industry that depends on quartz glass places a distinct set of demands on the material. FGQuartz has dedicated engineering knowledge for each of the six major application industries it serves.
High-purity semiconductor quartz glass is essential for front-end wafer processing in modern fabs. FGQuartz supplies precision quartzware — process tubes, wafer boats, gas injectors and wet benches — engineered for extreme thermal cycling, aggressive chemicals and strict contamination control.
- Diffusion, oxidation & LPCVD/PECVD tubes
- Wafer boats & carriers (2″–12″)
- Gas injectors & wet process tanks
- Custom CNC quartz components
High-purity quartz glass is foundational to solar PV manufacturing, from crystal growth to cell processing. FGQuartz provides CZ/DS crucibles, diffusion tubes, wafer boats and PECVD components that deliver thermal stability, purity and longevity.
- CZ & Directional Solidification crucibles (G5–G8)
- Phosphorus diffusion tubes & wafer boats (M10/G12)
- PECVD/LPCVD tubes, bell jars & liners
- Wet process tanks & handling tools
FGQuartz manufactures high-transmission optical quartz glass (JGS1/JGS2 grades) for UV to near-IR applications. Our fused silica optics deliver exceptional clarity, laser damage resistance and thermal stability for demanding photonic systems.
- UV windows, lenses, prisms & etalons
- Excimer laser & Nd:YAG optics
- Spectroscopy cuvettes & flow cells
- AR/HR coated custom optical components
Laboratory quartz glass equipment meets the highest demands of trace element analysis, high-temperature synthesis and chemical processing. Ultra-low contamination, superior thermal shock resistance and chemical inertness far beyond borosilicate glass.
- Crucibles, combustion boats & reaction tubes
- Beakers, distillation apparatus & sub-boiling stills
- ICP plasma torch assemblies
- Custom labware for geochemistry & pharmaceuticals
Every optical fiber starts with high-purity quartz glass preforms. FGQuartz supplies critical components for MCVD, VAD and OVD processes — substrate tubes, mandrels, jacketing tubes and lathe hardware — ensuring precise geometry and refractive index control.
- MCVD substrate tubes with tight wall uniformity
- VAD/OVD reaction tubes, mandrels & starting rods
- Overclad & fluorine-doped cladding tubes
- Sintering furnace liners & lathe fittings
High-purity fused silica engineered for extreme industrial heating and thermal processing. Continuous operation up to 1200°C, short-term to 1300°C, with exceptional thermal shock resistance and chemical inertness.
- Infrared heater tubes & furnace process tubes
- Thermocouple protection tubes & observation windows
- Clear & opaque furnace liners
- Custom assemblies for metal heat treatment & ceramics
The Six Properties That Make Quartz Glass Irreplaceable
No single alternative material simultaneously provides all six of these properties. This combination places fused silica at the centre of modern high-technology manufacturing.
Extreme Thermal Stability
Continuous service to 1200°C and short-term excursions to 1300°C — beyond borosilicate, most ceramics and engineering metals.
Near-Zero Thermal Expansion
Coefficient of thermal expansion orders of magnitude lower than other glasses or metals, delivering outstanding thermal shock resistance.
Broad Optical Transparency
Transmission from deep UV (~150 nm) through near-IR (~3.5 µm), enabling photochemistry, spectroscopy and infrared heating.
Chemical Inertness
Resistant to nearly all mineral acids, oxidants, halogens and process gases. Does not leach metallic impurities into the process environment.
Ultra-High Purity
SiO₂ ≥ 99.99% with transition metal impurities at sub-ppm levels — critical for semiconductor, solar and analytical applications.
Electrical Insulation at High Temperature
Maintains dielectric performance at temperatures where most polymer insulators fail — essential for plasma and furnace equipment.
Frequently Asked Questions
The key specification dimensions for quartz glass are: operating temperature (which rules out lower grades for high-temperature applications and influences devitrification risk), wavelength range (which determines whether high-OH JGS1 synthetic grade or low-OH JGS2 natural grade is appropriate), purity requirements (which set the maximum acceptable metallic impurity levels for the specific contamination-sensitive process), and whether clear or opaque grade is required for the thermal function. FGQuartz’s engineering team provides application-specific grade selection advice as part of the quotation process — customers can describe the application environment and FGQuartz will recommend the appropriate grade and form, rather than the customer needing to navigate the grade selection independently. Each of the six industry pages on the FGQuartz website provides detailed grade selection guidance for that specific sector.
There is no minimum order quantity on custom components. Research groups evaluating a new reactor design can order a single custom quartz vessel; OEM engineers qualifying a new instrument component can order a single prototype window or lens. Standard stock items — common tube diameters, standard crucible sizes, catalogue cuvettes — are available in single-unit quantities for evaluation and sampling. Volume pricing tiers apply to larger quantities, and FGQuartz provides pricing at multiple quantity break points in the quotation so that customers can see the cost-benefit of different order sizes.
Yes. Mixed orders covering multiple application sectors are handled routinely from the same Lianyungang facility. A common example is an analytical instrument manufacturer sourcing both optical quartz windows for the detection system (optical application) and ICP plasma torch tubes for the excitation source (laboratory application) in the same purchase order. A research institution might order laboratory crucibles, optical cuvettes, and tube furnace process tubes together. All items are manufactured, quality-checked, and shipped with coordinated delivery scheduling. There is no requirement to place separate orders for items from different application categories.
FGQuartz has manufactured exclusively from fused silica and high-purity quartz glass since 2005 — not as one product line among many, but as the company’s entire business. This single-material focus produces engineering expertise in fused silica that a general glassware distributor or a broad-range materials supplier cannot match. The company operates a vertically integrated manufacturing facility in Lianyungang that covers the full production chain from raw material selection through CNC machining, flame forming, optical polishing, and cleanroom packaging. This means that product quality is controlled at every step without subcontracting.
High-purity quartz glass is essential in six major industries. In semiconductor manufacturing, it is used for diffusion tubes, wafer boats, CVD reactor components, and wet process tanks where its ultra-low metallic contamination prevents yield-damaging impurities in silicon wafers. In optical and photonics systems, fused silica provides UV transmission from 150 nm through the visible and near-infrared that no other glass matches, enabling laser optics, spectroscopy instruments, UV lithography, and telescope mirrors. In laboratory research, quartz crucibles, ICP plasma torches, cuvettes, and tube furnace hardware provide the high-temperature capability and ultra-low chemical blank required for accurate trace element analysis. In optical fiber manufacturing, high-purity substrate tubes and reaction vessels are required because any impurity in the preform manufacturing equipment propagates into every metre of fiber drawn from that preform. In solar photovoltaic manufacturing, CZ crucibles for silicon ingot growth, diffusion tubes for cell emitter formation, and wafer boats are consumed in large volumes across the production chain. In industrial high-temperature processing, infrared heater tubes, furnace liners, thermocouple protection tubes, and observation windows enable heating and monitoring of processes that exceed the temperature capability of all other glass materials.
Need Quartz Solutions for Your Industry?
Whether you are developing a new semiconductor process, scaling solar cell production, building optical systems, equipping a research laboratory, manufacturing optical fiber, or operating high-temperature industrial equipment — FGQuartz has the high-purity quartz glass components and custom fabrication capability to support you.
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Business Hours: Mon – Sat 9am to 6pm