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 - Reliable Factory for Semiconductor & Chemical Applications Manufacturer, Suppliers

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Wholesale Customized High-Purity Quartz Products from China Suppliers - Reliable Factory for Semiconductor & Chemical Applications Manufacturer, Suppliers

Quartz instruments, manufactured from high-purity quartz material, encompass a wide range of products including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their exceptional high-temperature and corrosion resistance, outstanding light transmittance, and robust chemical stability, these instruments are invaluable in various industries. As a leading factory and supplier in China, we provide core instruments essential for high-temperature processing, precision synthesis, and optical experiments. Our quartz products ensure process accuracy and reliable equipment operation across sectors such as semiconductors, photovoltaics, chemicals, and scientific research

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Product Description

Product Specifications

⚙ Mechanical & Physical Properties

Mechanical Behavior	Standard Values
Density	2.2 g/cm³
Compressive Strength	1100 MPa ★ Key
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	1,280 °C
Softening Point	1,780 °C ★ Key
Annealing Point	1,250 °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	1,750 ~ 2,050 °C
Short-Term Use Temperature	1,300 °C
Long-Term Use Temperature	1,100 °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

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

This quartz glass can withstand a short-term use temperature of up to 1,300 °C and a long-term use temperature of up to 1,100 °C. Its softening point reaches 1,780 °C, making it suitable for high-temperature industrial applications.

Q What material is this quartz glass made from?

It is made from Silicon Dioxide (Natural Quartz), which ensures high purity, excellent optical clarity, and outstanding thermal resistance compared to synthetic alternatives.

Q What thickness options are available for this quartz glass?

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

Q What PPM purity grades are available?

The quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate level of purity for semiconductor, laboratory, or industrial use.

Q Why is the low thermal expansion coefficient important for quartz glass?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means the glass resists dimensional changes under rapid or extreme temperature fluctuations, preventing cracking and ensuring dimensional stability in precision applications.

Q What surface quality standards does this quartz glass meet?

The quartz glass is manufactured to a bubble-free and line-free surface standard, ensuring optical clarity and structural integrity. It is transparent or colorless in appearance, making it ideal for optical and high-precision applications.

Wholesale Customized High-Purity Quartz Products from China Suppliers - Reliable Factory for Semiconductor & Chemical Applications Manufacturer, Suppliers

Product Description

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