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.

High-Quality Customized Quartz Products from China Suppliers - High-Purity Quartz Factory for Semiconductor and Chemical Applications Factory, Products

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High-Quality Customized Quartz Products from China Suppliers - High-Purity Quartz Factory for Semiconductor and Chemical Applications Factory, Products

Discover our high-purity quartz instruments, meticulously crafted in our factory in China. We offer an extensive range of products, including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Renowned for their high temperature resistance, corrosion resistance, excellent light transmittance, and robust chemical stability, our quartz instruments are essential in various industries such as semiconductor, photovoltaic, and chemical manufacturing. As leading suppliers, we ensure that our products are core instruments in high-temperature processing, precision synthesis, and optical experiments, guaranteeing process accuracy and reliable equipment operation. Choose our quartz solutions for unparalleled performance and quality!

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Product Description

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Product Specifications: 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

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Frequently Asked Questions

Q What material is this quartz glass made from?

This quartz glass is made from Silicon Dioxide (SiO₂) sourced from natural quartz. It is transparent or colorless with a bubble-free, line-free surface finish, ensuring excellent optical clarity.

Q What is the maximum operating temperature for long-term use?

For long-term continuous use, the recommended maximum temperature is 1100 °C. For short-term applications, it can withstand up to 1300 °C without significant degradation.

Q What makes this quartz glass suitable for high-temperature environments?

Its extremely low thermal expansion coefficient (5.5 × 10⁻⁷ cm/cm·°C), high softening point of 1780 °C, and high compressive strength of 1100 MPa make it exceptionally resistant to thermal shock and suitable for demanding high-temperature industrial applications.

Q What thickness options are available for this quartz glass?

The quartz glass is available in thicknesses ranging from 2 mm to 20 mm, in a circular shape, making it adaptable to a wide variety of industrial and laboratory requirements.

Q What PPM purity grades are available?

The quartz glass is offered in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate level of purity for semiconductor, optical, or general industrial applications.

Q What is the index of refraction and why does it matter?

The index of refraction is 1.4585. This value is critical for optical applications, as it determines how light bends when passing through the glass. The consistent refractive index of natural quartz ensures reliable performance in lenses, windows, and precision optical instruments.

High-Quality Customized Quartz Products from China Suppliers - High-Purity Quartz Factory for Semiconductor and Chemical Applications Factory, Products

Product Description

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