Quartz glass manufacturer · Lianyungang, China · Since 2005
Custom Quartz Glass Manufacturer: Tell Us What You Need Made
FGQuartz is a fused silica (quartz glass) factory in Lianyungang, China. We supply tubes, rods, plates, wafer boats, crucibles, tanks, and inline heaters, and we make one-off or repeat parts that no catalogue lists.
You do not need a finished drawing to begin. A sketch, a worn sample, a photo, or a plain description of what the part must do is enough for our engineers to start the conversation, and prototypes can be a single piece.
Quick answer
Can FGQuartz make the quartz glass part I need? In most cases the answer starts with yes, then a short engineering check. FGQuartz is a manufacturer, not a trading intermediary: it forms and machines fused silica (SiO₂ ≥ 99.99%) in its own plant, from standard catalogue items to parts that did not exist until the customer described them. Whether you hold a CAD file, a hand sketch, an old part, or only an idea, send what you have and the team replies with what is feasible, which grade and process fit, and a quotation, typically within 24 business hours.
Key takeaways
- Standard lines: tubes, rods, plates, wafer boats, crucibles, tanks, and inline heaters. Everything else is made to order.
- No minimum order, so a single prototype is a normal request.
- Fused silica handles continuous heat to 1200°C, but not HF, hot concentrated phosphoric acid, or hot strong alkalis. The team will say so if another material suits you better.
- Serving customers in 40+ countries from a 15,000 m² ISO 9001 facility, operating since 2005.
Written by the FGQuartz Engineering Team · Updated October 2026
On this page: Ways to start · Problems we solve · Products · Product selector · Industries · Custom work · Is quartz right? · Engineering notes · The plant · Why FGQuartz · Guides · FAQ · Contact
Lead time depends on size, grade, and complexity; the quotation confirms the schedule. Quality system: ISO 9001.
How can I start if I do not have a drawing?
Ways to start
Every project begins differently, so there is no required format. Pick the line that sounds like you. Buying a standard tube, boat, or crucible instead? Send the size and quantity, or browse the catalogue.
No drawing
I only have an idea
Tell us what the part must do: the process, the temperature, the chemicals or gases, and the space it has to fit. The engineers propose a buildable shape and confirm it before anything is made.
Sketch or photo
I have a rough sketch or photos
A hand sketch with the main dimensions, or photos of the equipment it goes into, is a workable starting point. Missing details are settled in review.
Sample
I have the old part
Worn, broken, or discontinued? Send the part, or photos with key dimensions, and FGQuartz reproduces it. The intended use helps us check wall thickness and finish.
CAD drawing
I have a full drawing
DXF, STEP, IGES, or PDF. The team checks manufacturability, flags anything that could cause trouble, and quotes to the drawing.
What problems do customers bring to FGQuartz?
Problems we solve
These are typical situations rather than named customer cases. If yours looks different, describe it anyway.
The original supplier is gone
A furnace tube or fixture needs replacing and nobody makes it any more. FGQuartz copies it from the sample, then checks wall, ends, and annealing against how it is used.
Standard sizes do not fit
New equipment, odd chamber, or a different wafer format. We build to your dimensions instead of asking you to redesign around stock sizes.
The analytical blank is too high
Trace-element work needs vessels that add very little metal or alkali. Fused silica vessels made to your shape help, and you should still verify the blank for your own method.
The process needs UV light
Borosilicate blocks the deep UV. Windows, cuvettes, and flow cells in a JGS grade matched to your wavelength keep the light path open.
A liquid must be heated with no metal in contact
Inline heater chambers in fused silica keep the wetted path free of metal, for DI water and high-purity chemistries that suit quartz.
Nobody has made this before
A new reactor, a test rig, a one-off apparatus. Prototype from one piece, learn from it, then repeat or scale.
What quartz glass products does FGQuartz make?
Products
Seven standard lines plus made-to-order work. Ranges are typical, not limits; each product page carries the detail. Whole range: product catalogue.
Furnace, diffusion, CVD, and reaction tubes, plain or fully fabricated.
Typical range: OD 5–1000 mm
Solid rods for supports, preform work, stirring, and fixtures.
Typical range: OD 3–300 mm
Process plates, viewports, and JGS optical windows.
Typical range: 0.5–50 mm thick, up to 1200 × 1200 mm
Wafer and cell carriers for diffusion, oxidation, and LPCVD furnaces.
Typical range: 2–12 in wafers, 25–150+ slots
Crystal-growth crucibles and laboratory crucibles.
Typical range: 10 ml laboratory to 32 in CZ
Flow-through heating chambers for ultra-pure liquids.
Typical range: Sized to flow rate and chamber
Labware, optics, assemblies, copies of old parts, and anything else that does not fit a catalogue line.
Typical range: any shape that can be formed or machined from fused silica
Which quartz glass product fits my job?
Quick selector
Find your task on the left. The middle column is the page to open; the right column is what we usually adjust.
| If you are working on… | Look at | Usually adjusted |
|---|---|---|
| Ashing, calcination, melting in a lab | Crucibles and boats | Lids, spouts, and non-standard capacities are routine changes. |
| Diffusion, oxidation, or LPCVD furnace | Tubes, boats, rods, plates | Order the set together so the parts share one material system. |
| Pulling silicon crystals (CZ / DS) | Crucibles | Diameter and wall follow the puller and thermal profile. |
| UV measurement, laser optics, or viewing a hot process | Plates and windows | Choose the JGS grade by wavelength; cells and cuvettes are made to order. |
| Heating clean liquid without metal contact | Inline heaters | For chemistries that suit quartz; not for HF. |
| Wet-bench baths and soak vessels | Tanks | Ports, drains, and covers are specified on the drawing. |
| Supports, stirring, or preform work | Rods | Ground, drilled, or polished to the use. |
| Something else | Custom quartz glass | Describe it; if fused silica can be formed or machined into it, we can review it. |
Which industries does FGQuartz supply?
Industries
The same product families serve very different processes. Open your industry for typical parts and limits, or see the overview of all six.
Semiconductor
Furnace tubes, wafer boats, injectors, wet-bench tanks and heaters for front-end processing.
Solar photovoltaic
Crystal-growth crucibles, diffusion tubes, and cell boats for M10, G12, and other formats.
Optics and photonics
Windows, plates, cuvettes, and flow cells in JGS1, JGS2, or JGS3.
Laboratory and scientific
Crucibles, boats, tubes, and custom apparatus for ashing, digestion, and synthesis.
Fiber optic
Substrate tubes, jacketing tubes, and starting rods for preform makers.
High-temperature industrial
Furnace liners, heater envelopes, thermocouple sheaths, and observation windows.
Can FGQuartz make something that is not in any catalogue?
Custom work
Many quartz parts are made by two kinds of work: hot work (flame forming, bending, necking, sealing, and welding of flanges, ports, and sections) and cold work (diamond cutting, drilling, slotting, grooving, threading, grinding, and polishing). FGQuartz does both in the same plant and anneals the part afterwards, so one team is accountable from the first cut to final inspection.
Typical requests include matched sets of crucibles or beakers, multi-port vessels, closed-end tubes, flow cells with a set path length, standard ground joints (14/20, 19/22, 24/40, 29/42), and copies of discontinued apparatus. If it can be formed or machined from fused silica, feasibility is confirmed in engineering review before you commit. More on thermal processing and cold processing.
What happens after I contact FGQuartz?
How ordering works
Step 1
Tell us
Describe the part in whatever form you have: idea, sketch, photos, sample, or drawing. Add the process, peak temperature, chemistry, and quantity if you know them.
Step 2
Engineering review
The team checks what is feasible, suggests a grade and build route, and points out risks such as wall thickness, support, or chemistry.
Step 3
Quotation and schedule
You receive a price and lead time, typically within 24 business hours. Simpler parts usually take 7–14 days, complex assemblies 3–6 weeks.
Step 4
Make, check, ship
The part is made, annealed, inspected against the agreed dimensions under ISO 9001, and packed for export.
How do I know whether quartz glass is the right material?
Is quartz right for you?
A fast self-check. Fused silica is hard but brittle, and honest advice saves both of us a failed part. For numbers, see the technical specifications and the quartz vs borosilicate comparison.
Usually a good fit
Quartz works well when…
- you run above what borosilicate tolerates, up to 1200°C continuous
- the sample or wafer must stay free of metal and alkali pick-up
- light below about 300 nm has to pass through
- the part meets hot HCl, HNO₃, H₂SO₄, aqua regia, or organic solvents
- temperature changes quickly and the part is supported and handled correctly
Ask us first
Worth a conversation when…
- pressure or vacuum is involved (wall thickness is calculated per drawing)
- molten alkali salts or fluxes touch the part
- a long tube must run unsupported
- the surface will be heated above roughly 1150°C after handling, where fingerprints and salts can cause devitrification
Choose another material
Quartz is the wrong tool when…
- hydrofluoric acid is present
- hot concentrated phosphoric acid is used
- hot strong alkalis such as KOH or NaOH are used
- continuous service sits above about 1200°C
- the part will take heavy mechanical impact
What does the FGQuartz engineering team tell new users of quartz?
Engineering notes
Six habits that prevent most quartz failures, from the people who make and inspect the parts.
Clean before you heat
Wipe with alcohol or use an acid bath first. Alkali salts and fingerprints encourage devitrification above roughly 1150°C, and the part can turn cloudy and weak.
Support what is long or large
Large-diameter and thin-wall tubes should be supported along their length and heated in a controlled way. Quartz survives temperature swings; it does not survive bending loads.
Give us the pressure case
Pressure rating is worked out per drawing from wall, diameter, length, and surface condition. Tell us working pressure, temperature, and cycle so the wall can be calculated.
Match the grade to the light
JGS1, JGS2, and JGS3 differ in the wavelengths they pass. A wrong grade is the most common optical mistake we can prevent in review.
Protect the edges
Rims and thin walls chip first. Avoid impact and point loads, lift hot parts with tongs, and set them on a heat-resistant surface rather than wet or cold metal.
Check the chemistry early
Hot mineral acids are fine. HF, hot concentrated phosphoric acid, and hot strong alkalis are not. Mention every chemical in your first message.
What is quartz glass, in plain terms?
Material in brief
Quartz glass, fused quartz, and fused silica all describe amorphous silicon dioxide. In practice, fused quartz is melted from natural quartz crystal, while fused silica is synthetic and generally purer and more uniform optically. FGQuartz works in both, and in clear, optical (JGS1 for deep UV, JGS2 for UV to visible, JGS3 for infrared), and opaque forms.
Two numbers explain most of its behavior: continuous service to 1200°C, and a thermal expansion of about 5.5 × 10⁻⁷ per °C, roughly one-sixth that of borosilicate 3.3. That low expansion is why it tolerates fast temperature change when the part is designed and handled properly. Read what quartz glass is or choose a grade with the JGS grade guide.
Who is behind FGQuartz, and where are the parts made?
The plant
FGQuartz makes quartz glass in a 15,000 m² facility in Lianyungang, China, operating since 2005 under an ISO 9001 quality system. Melting and drawing, diamond machining, flame work, polishing, and annealing happen on site, so a drawing does not get passed between workshops. Overseas orders ship to more than 40 countries with export packing and compliance documentation, and more than 500 customers have bought from us. Company details: About FGQuartz.
Why do customers choose FGQuartz?
Why FGQuartz
Where can I read more before getting in touch?
Guides and references
Naming, feedstock, and where each type is used.
When the extra cost of quartz pays off.
Match the optical grade to your wavelength.
Thermal, mechanical, optical, and chemical data.
Short answers on buying and engineering.
Six industries and the parts they use.
Frequently asked questions
FAQ
Send a drawing (DXF, STEP, IGES, PDF), dimensions, or an application description through our contact page. Quotations are typically returned within 24 business hours.
FGQuartz operates a 15,000 m² ISO 9001-certified facility in Lianyungang, China, and exports to 500+ customers across 40+ countries.
No. FGQuartz accepts single-piece prototype orders with no MOQ, scaling up to OEM production volumes on the same tooling.
All standard products are manufactured to SiO2 purity ≥99.99%, with optical-grade JGS1/JGS2/JGS3 materials available for UV, visible, or infrared transmission requirements.
FGQuartz manufactures high-purity quartz glass tubes, rods, plates, wafer boats, crucibles, tanks, and inline heaters, plus fully custom fused silica fabrication for semiconductor, solar, optical, fiber-optic, and laboratory applications.
Contact FGQuartz
Get in touch
However you plan to make it, start the conversation. Useful to include, but none of it is mandatory:
- What the part is for and how it is used
- A drawing, sketch, photo, or the old part
- Operating temperature and the chemicals or gases involved
- Size limits, finish, or optical grade if relevant
- Quantity: one prototype or a production run
Email: info@fgquartz.com
Location: Lianyungang, China
Reply: typically within 24 business hours