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 Quartz Products from China - High-Quality Suppliers and Factory Solutions for Your Needs Manufacturer, Products

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Wholesale Customized Quartz Products from China - High-Quality Suppliers and Factory Solutions for Your Needs Manufacturer, Products

Our high-purity quartz instruments, manufactured in China, include an extensive range of products such as quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. These premium quartz products are known for their exceptional temperature resistance, corrosion resistance, outstanding light transmittance, and robust chemical stability, making them essential in various industries. As leading suppliers and factory providers, we cater to the semiconductor, photovoltaic, and chemical sectors, as well as scientific research fields. Our quartz instruments are crucial for high-temperature processing, precision synthesis, and optical experiments, ensuring accurate processes and reliable equipment performance.

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Product Description

Mechanical Behavior & 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	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

Frequently Asked Questions

Q1 What is the maximum use temperature of this quartz glass product?

This quartz glass product supports a short-term use temperature of up to 1300 °C and a long-term use temperature of up to 1100 °C. The thermal processing temperature range is 1750 ~ 2050 °C, making it suitable for high-temperature industrial applications.

Q2 What material is used, and what are its purity grades?

The material is Silicon Dioxide (Natural Quartz). It is available in controlled PPM grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate purity level based on their specific application requirements.

Q3 What thickness options are available for this quartz glass?

The quartz glass is available in a thickness range of 2 MM to 20 MM. It comes in a circular shape and features a transparent or colorless appearance with a surface free of air bubbles and lines.

Q4 What is the thermal expansion coefficient of this quartz glass?

This quartz glass has an exceptionally low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C. This ultra-low expansion rate ensures excellent dimensional stability across wide temperature ranges, minimizing thermal stress and deformation during use.

Q5 How hard is this quartz glass, and what is its compressive strength?

The quartz glass has a Mohs hardness of 5.5 ~ 6.5 and a compressive strength of 1100 MPa, demonstrating excellent mechanical durability. Its Young's Modulus is 72000 MPa and Modulus of Rigidity is 31000 MPa, indicating high structural rigidity.

Q6 What is the index of refraction, and how does it affect optical applications?

The quartz glass has an index of refraction of 1.4585. This precise optical property, combined with its transparency and bubble-free surface, makes it highly suitable for optical lenses, laser windows, UV transmission components, and other precision optical applications.

Wholesale Customized Quartz Products from China - High-Quality Suppliers and Factory Solutions for Your Needs Manufacturer, Products

Product Description

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