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 - Leading Suppliers and Factory for Semiconductor and Scientific Applications Suppliers, Factories

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Wholesale Customized High-Purity Quartz Products from China - Leading Suppliers and Factory for Semiconductor and Scientific Applications Suppliers, Factories

Quartz instruments, manufactured from high-purity quartz material, are essential components in various industries, including semiconductor, photovoltaic, chemical, and scientific research. Our product range features quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their high temperature resistance, corrosion resistance, excellent light transmittance, and strong chemical stability, these instruments ensure process accuracy and reliable equipment operation in high-temperature processing, precision synthesis, and optical experiments. As a leading factory and key suppliers in China, we are committed to providing top-quality quartz solutions tailored to meet the demands of modern technology

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Product Description

Product Specifications

⚡ Key Specifications at a Glance

🧱

Material Silicon Dioxide

🌡️

Softening Point 1780°C

💎

Mohs Hardness 5.5 ~ 6.5

📐

Thickness 2MM – 20MM

🔬

Compressive Strength 1100 MPa

📋 Full Mechanical & Physical Properties

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 The Quartz Glass Brick
PPM Grade	Controlled 10 / 20 / 100 PPM
Shape	Circle
Thickness	2MM – 20MM

❓ Frequently Asked Questions

Q What material is this quartz glass made from?

This quartz glass is made from Silicon Dioxide (Natural Quartz), which ensures high purity, excellent optical clarity, and outstanding thermal stability. The transparent or colorless appearance reflects its natural raw material quality.

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

This quartz glass can withstand a short-term use temperature of up to 1300°C and a long-term continuous use temperature of up to 1100°C. The softening point is 1780°C, and thermal processing is performed between 1750°C and 2050°C.

Q What thickness options are available for this quartz glass?

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

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

The quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. Lower PPM values indicate higher purity, which is critical for semiconductor manufacturing, laboratory equipment, and other high-precision applications where contamination must be minimized.

Q What is the thermal expansion coefficient, and why is it important?

The low thermal expansion coefficient is 5.5 × 10⁻⁷ cm/cm·°C, which is exceptionally low. This means the material undergoes minimal dimensional change with temperature fluctuations, making it ideal for precision optics, high-temperature environments, and applications requiring dimensional stability.

Q How hard is this quartz glass, and does it resist surface damage?

With a Mohs hardness of 5.5 to 6.5, quartz glass offers good resistance to scratching and surface abrasion. The surface quality is guaranteed to be free of air bubbles and lines, ensuring optical clarity and structural integrity in demanding applications.

Wholesale Customized High-Purity Quartz Products from China - Leading Suppliers and Factory for Semiconductor and Scientific Applications Suppliers, Factories

Product Description

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