Verified Quality
Every shipment passes helium mass-spectrometry leak detection, pressure resistance and purity testing, so components arrive stable, impurity-free and leak-tight.
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Fused Quartz Manufacturer · Donghai, China
High-Purity Quartz Tubes & Custom Quartzware, Made to Your Drawing
Lianyungang Southeast Quartz Products Co., Ltd. hot-works and precision-machines fused quartz components in Donghai County, Jiangsu — China's best-known crystal and quartz industrial cluster. Since 2015 we have supplied quartz furnace tubes, quartz boats, bell jars, plates, rods, rings and fully customized quartz instruments to process engineers and sourcing teams in Europe, the Americas, Southeast Asia and the Middle East.
Each part is built around your equipment parameters, and sealed or pressure-bearing quartzware is helium-leak and pressure tested before it leaves our factory.
Typical Fused Quartz PropertiesReference Values · Grade Dependent
- SiO₂ content
- ≥ 99.99 %High-purity grades
- Softening point
- ≈ 1,683 °CTransparent fused quartz
- Continuous service
- ≈ 1,100 °CShort-term up to ≈ 1,250 °C
- Thermal expansion
- ≈ 5.5 ×10⁻⁷/KExceptional thermal-shock resistance
Values are typical for transparent fused quartz and vary by grade, geometry and process atmosphere. Material data sheets are included with our product catalog.
Products Matrix
Precision Quartz Components for High-Temperature & High-Purity Processes
From oversized furnace tubes to micro-channel flow cells, every component below is produced in-house and can be re-dimensioned to your OD, wall thickness, length, tolerance and end-form requirements.
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Quartz Microchannel Flow Cell
Fused-silica flow path for UV-Vis and fluorescence detection.
3-Port Quartz Bubbler / Source Bottle / Wet Oxygen Bottle
Precursor delivery and wet-oxidation vessels for diffusion lines.
Half-White Coated Short-Wave IR Quartz Heating Lamp
Reflective coating directs infrared energy toward the work zone.
Quartz Crystal Singing Pyramid
Hand-finished clear quartz form for sound and wellness studios.
Quartz Irregular Shaped Sheets
Non-standard profiles CNC-cut from fused quartz plate.
Plasma-Fused Quartz Ingots
Plasma-melted high-purity quartz stock for downstream machining.
Oversized Fused Quartz Tube
Large-diameter tubes for furnaces, reactors and process chambers.
Custom Size Quartz Furnace Tube
Built to your furnace dimensions, flanges and end-form.
Quartz Bell Jar
Thermally stable domes for vacuum and deposition chambers.
Premium Quartz Boat
Slotted wafer carriers for diffusion, oxidation and annealing.
Factory LocationDonghai County, Jiangsu
About & Manufacturing
A Quartz Workshop Built on Process Control
Southeast Quartz integrates R&D, design, production and export sales under one roof. Our team brings more than ten years of hands-on quartz experience, covering the full chain from quartz raw-material processing to finished, inspected components.
Being located in Donghai — the leading quartz product distribution center on the Eurasian continent — gives us short access to high-purity tube, rod and ingot stock, which shortens lead times for custom orders and keeps material traceable.
- Standardized production workshops with dedicated hot-working and cold-machining lines
- Helium mass-spectrometry leak detection, pressure and purity testing before shipment
- Engineering review of every drawing against your equipment and process parameters
Founded
2015
Independent quartz manufacturer since 2015.
Experience
10+
Years of quartz-industry know-how.
Skilled Staff
100+
Glass workers, machinists, QC and engineers.
Utility Model Patents
200+
Proprietary structures and process tooling.
From Raw Quartz to Verified Component
Get Process & Material Data- STEP 01
Material Selection
High-purity fused quartz tube, rod, plate and ingot stock checked on arrival.
- STEP 02
Hot Working
Lathe and flame forming, welding, bending, sealing and flame polishing.
- STEP 03
Cold Machining
CNC cutting, grinding, drilling and precision slotting for boats and plates.
- STEP 04
Cleaning & Annealing
Acid cleaning on purification equipment and stress-relief annealing.
- STEP 05
Inspection
Helium leak, pressure, purity and dimensional checks against your drawing.
Core Strengths
Why Global Buyers Choose Southeast Quartz
Procurement teams need more than a price list — they need a supplier that understands furnace geometry, process gases and failure modes. These four commitments define how we work.
Full-Process Manufacturing
Standardized workshops, advanced quartz processing equipment and an in-house R&D team cover raw material processing through finished-part production.
Proven Export Track Record
Our quartzware serves customers across China and is exported to Europe, the Americas, Southeast Asia and the Middle East, earning long-term repeat business.
Drawing-Based Customization
Sizes, structures and specifications are tailored to your equipment parameters and process requirements, with fast response for small-batch and prototype orders.
Industry Applications
Where Our Quartz Performs: Four Critical Industries
Lab-grade corrosion resistance, optical-grade transmittance and thermal-shock durability make fused quartz the material of choice wherever contamination or heat would destroy ordinary glass.
01 / SEMICONDUCTOR
Semiconductor Wafer Fabrication
High-purity quartz boats hold silicon wafers stably through diffusion, oxidation and annealing, while quartz furnace tubes and bell jars form clean, sealed reaction chambers for high-temperature and corrosive process gases.
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02 / PHOTOVOLTAICS
Photovoltaic Production
High-purity quartz crucibles serve as core containers for pulling single-crystal silicon, while quartz tubes and plates provide stable, high-transmittance components that protect photoelectric conversion efficiency.
Explore Furnace Tubes
03 / OPTICAL & MEDICAL
Optical & Medical Instruments
Precision-machined quartz sheets become optical windows with excellent UV-to-IR transmittance, and quartz prisms deliver stable optical performance inside analytical and medical instruments where measurement accuracy matters.
Explore Quartz Plates
04 / LABORATORY
Chemical Engineering & Research Labs
Quartz reactors, beakers and custom instruments combine thermal stability with chemical inertness, giving researchers reliable vessels for high-temperature, corrosion-resistant experiments.
Explore Custom Quartz Buyer's Guide
Specifying Quartz Components: Answers for Engineers & Buyers
What to send for a first-pass engineering review
- OD / ID or wall thickness, length and tolerances
- End form: open, closed, flanged, ground joint or fittings
- Material grade: transparent or opaque fused quartz
- Working temperature, atmosphere and thermal cycling
- Batch or annual quantity and target delivery date
- Drawing in PDF, DWG or STEP format
What information do you need to engineer a custom quartz tube or component?
Please send outer and inner diameter (or wall thickness), length, required tolerances, end configuration (open, closed, flanged, ground joint or welded fittings), material grade (transparent or opaque fused quartz), working temperature and atmosphere, batch or annual quantity, and a drawing in PDF, DWG or STEP format. Complete data lets our engineers confirm manufacturability and lead time in a single review.
What is the maximum operating temperature of fused quartz?
Transparent fused quartz typically supports continuous service around 1,100 °C and short exposures up to roughly 1,250 °C, with a softening point near 1,683 °C. Real limits depend on grade, load, atmosphere and cycle time. Above about 1,100 °C, surface contamination such as alkali residue from skin contact accelerates devitrification, so quartzware should be cleaned and handled with clean gloves before firing.
How does Southeast Quartz verify quality before shipment?
Products undergo helium mass-spectrometry leak detection, pressure resistance testing and purity testing before leaving the factory, together with dimensional inspection against the customer drawing, to ensure stable performance with no impurities and no leakage.
Can you manufacture oversized quartz tubes and non-standard quartz shapes?
Yes. Our workshop combines flame hot-working with CNC cold machining, so we produce oversized fused quartz tubes, bell jars, slotted quartz boats, flanged reactors, irregular shaped quartz sheets and fully customized quartz instruments according to customer equipment parameters.
Where is Southeast Quartz located and which markets do you export to?
Our factory is at No. 1 Qingsheng Rd., Qinghu Industrial Park, Donghai County, Jiangsu, China, within China's best-known crystal and quartz industrial cluster. Besides customers throughout China, we export to Europe, the Americas, Southeast Asia and the Middle East.
Industry Insights
Technical Notes & Market Insights from Our Quartz Team
Practical knowledge on quartz performance, failure prevention and market shifts — written from the factory floor for engineers and sourcing managers.
Technical Note
How Does the Wear Resistance of Quartz Tubes Affect Industrial Applications?
Quartz tubes are vital in semiconductor manufacturing, laboratory equipment, industrial heating and UV water treatment thanks to their heat resistance, chemical stability and optical transparency. Wear resistance is a key factor that determines both tube service life and equipment operational stability.
Read the Full Note
Targeting High-End Markets: How the Quartz Product Industry Is Evolving
Low-to-mid-end demand stagnates while supply stays tight for high-purity, high-precision quartz used in semiconductors, AI optical communications, N-type PV and high-end optics.
High-Purity Quartz Products Empower the High-End Manufacturing Value Chain
Semiconductors, photovoltaics and precision optics are pushing quartz suppliers toward higher purity, tighter precision and deeper customization.
Why Quartz Tubes Set the Benchmark for High-End Laboratory Consumables
Heat resistance, chemical inertness, optical clarity and vacuum-tight sealing let quartz tubes outperform standard glassware in precision experiments.
Start Your Project
Send Us Your Drawing. Our Quartz Engineers Reply Within 24 Hours.
Share dimensions, tolerances and process conditions — we will confirm material grade, manufacturability and lead time, and send our full product catalog with material data.