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.

Wholesale Customized High-Purity Quartz Products from China Suppliers - Factory Direct for Semiconductor and Optical Applications Supplier, Products

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Wholesale Customized High-Purity Quartz Products from China Suppliers - Factory Direct for Semiconductor and Optical Applications Supplier, Products

Quartz instruments, sourced from reliable China suppliers and manufactured in state-of-the-art factories, are crafted from high-purity quartz material. Our extensive product range includes quartz tubes, boats, crucibles, reactors, spiral tubes, and reaction vessels. These products exhibit remarkable features such as high temperature resistance, corrosion resistance, superior light transmittance, and strong chemical stability. They are indispensable in various industries, including semiconductor, photovoltaic, chemical, and scientific research. Ideal for high-temperature processing, precision synthesis, and optical experiments, our quartz instruments ensure process accuracy and reliable equipment performance, making them a top choice in the market

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Product Description

📋 Mechanical & Physical Properties — Standard Values

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	72,000 MPa
Modulus of Rigidity	31,000 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

❓ Frequently Asked Questions

💡 What is the maximum long-term use temperature for this quartz glass material?

The material supports a long-term use temperature of up to 1100 °C, while it can withstand short-term exposure up to 1300 °C. This makes it highly suitable for demanding high-temperature industrial applications.

💡 What material is used, and why is it preferred for high-performance applications?

The material is Silicon Dioxide (Natural Quartz). It is preferred due to its exceptional thermal stability, very low thermal expansion coefficient (5.5 × 10⁻⁷ cm/cm·°C), high compressive strength of 1100 MPa, and excellent optical clarity.

💡 What thickness options are available for this quartz glass product?

The quartz glass is available in thicknesses ranging from 2 mm to 20 mm, offering flexibility for a wide range of engineering and optical applications.

💡 What PPM purity grades are available, and how does purity affect performance?

The product is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. Higher purity (lower PPM) grades are critical for semiconductor, optical, and precision laboratory applications where contamination must be minimized.

💡 What is the softening point of this quartz glass, and why does it matter?

The softening point is 1780 °C, which is significantly higher than standard glass. This property ensures the material maintains its structural integrity under extreme thermal conditions, making it ideal for furnace components, laboratory equipment, and high-temperature optical systems.

💡 Does this quartz glass have any surface defects such as bubbles or lines?

No. The surface quality specification confirms no air bubbles and no lines, ensuring optical clarity and structural uniformity. This is essential for applications requiring precise light transmission or consistent mechanical performance.

Wholesale Customized High-Purity Quartz Products from China Suppliers - Factory Direct for Semiconductor and Optical Applications Supplier, Products

Product Description

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