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, annual or batch 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.

Custom Customized High-Purity Quartz Products from China Suppliers - Leading Factory for Semiconductor and Scientific Applications Manufacturers, Product

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Custom Customized High-Purity Quartz Products from China Suppliers - Leading Factory for Semiconductor and Scientific Applications Manufacturers, Product

Quartz instruments, manufactured from high-purity quartz material, encompass a diverse range of products including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their high temperature resistance, corrosion resistance, exceptional light transmittance, and remarkable chemical stability, these products are indispensable in various applications. Widely utilized across industries such as semiconductor, photovoltaic, chemical processing, and scientific research, they serve as essential tools in high-temperature processing, precision synthesis, and optical experiments. As leading suppliers and a reputable factory in China, we ensure our quartz instruments meet the highest standards, guaranteeing process accuracy and reliable equipment operation for our global clientele

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Product Description

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Mechanical Behavior & Material Specifications

Mechanical Behavior	Standard Values
Density	2.2 g/cm³
Compressive Strength	1100 MPa
Flexural Strength	67 MPa
Poisson's Ratio	0.14 ~ 0.17
Young's Modulus	72000 MPa
Modulus of Rigidity	31000 MPa
Mohs Hardness	5.5 ~ 6.5
★ Transformation Point	1280 °C
★ Softening Point	1780 °C
Annealing Point	1250 °C
Specific Heat (20 ~ 350 °C)	670 J/kg·°C
Thermal Conductivity (20 °C)	1.4 W/m·°C
Index of Refraction	1.4585
★ Low Thermal Expansion Coefficient	5.5 × 10⁻⁷ cm/cm·°C
Thermal Processing Temperature	1750 ~ 2050 °C
Short-Term Use Temperature	1300 °C
Long-Term Use Temperature	1100 °C
Material	Silicon Dioxide (Natural Quartz)
Color	Transparent or Colorless
Surface	No Air Bubble, No Line
Strain	1270°C Fused Quartz Glass Brick
PPM Grade	Controlled 10 / 20 / 100 PPM
Shape	Circle
Thickness	2 MM – 20 MM

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Frequently Asked Questions

Q What is the maximum operating temperature for fused quartz glass?

Fused quartz glass can withstand a short-term use temperature of up to 1300 °C and a long-term use temperature of up to 1100 °C. Its softening point is as high as 1780 °C, making it suitable for extreme thermal environments.

Q Why does fused quartz glass have such excellent thermal shock resistance?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means the material expands and contracts very minimally under temperature changes, greatly reducing internal stress and providing outstanding thermal shock resistance compared to standard glass.

Q What raw material is used to produce this fused quartz glass?

This fused quartz glass is manufactured from Silicon Dioxide (Natural Quartz), ensuring high purity and consistent optical and mechanical properties across all production batches.

Q What thickness options and shapes are available?

The fused quartz glass is available in a circular shape with thickness options ranging from 2 mm to 20 mm, accommodating a wide range of industrial and optical application requirements.

Q What PPM purity grades are available, and why does purity matter?

Three controlled purity grades are offered: 10 PPM, 20 PPM, and 100 PPM. Higher purity (lower PPM) is critical for semiconductor manufacturing, optical instruments, and laboratory applications where trace contamination could affect performance or product quality.

Q What does "No Air Bubble, No Line" surface specification mean?

This specification guarantees that the glass surface and interior are free from internal bubbles and striae (optical distortion lines). This ensures superior optical clarity, uniform light transmission, and structural integrity — essential for precision optical and high-temperature industrial applications.

Custom Customized High-Purity Quartz Products from China Suppliers - Leading Factory for Semiconductor and Scientific Applications Manufacturers, Product

Product Description

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