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 High-Purity Quartz Products from China Suppliers - Reliable Quartz Factory for Electronics and Research Manufacturers, Supplier

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High-Quality Customized High-Purity Quartz Products from China Suppliers - Reliable Quartz Factory for Electronics and Research Manufacturers, Supplier

Quartz instruments manufactured by leading suppliers in China are crafted from high-purity quartz material. Our extensive range includes quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. These products are renowned for their exceptional high temperature resistance, corrosion resistance, superior light transmittance, and robust chemical stability. They find extensive applications across various industries, including semiconductor, photovoltaic, chemical, and scientific research. As essential instruments for high-temperature processing, precision synthesis, and optical experiments, our quartz solutions ensure accuracy in processes and reliable operation of equipment. Trust our factory to deliver the quality and performance that meet your needs in advanced applications

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Product Description

Mechanical Behavior & Technical Specifications

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

Q What material is used to manufacture this quartz glass product?

The product is made from Silicon Dioxide (Natural Quartz). It is transparent or colorless in appearance, with a surface free of air bubbles and lines, ensuring high optical clarity and structural integrity.

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

The quartz glass has a short-term use temperature of up to 1300 °C and a long-term use temperature of 1100 °C. Its softening point is 1780 °C, making it highly suitable for extreme high-temperature environments.

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 range of industrial and optical applications. The standard shape is circular.

Q What does the PPM grade specification mean, and what grades are available?

PPM (Parts Per Million) grade refers to the level of impurity or contamination control within the quartz glass. This product is available in controlled grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate purity level for their specific application requirements.

Q How does the low thermal expansion coefficient benefit this quartz glass?

With a very low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C, this quartz glass exhibits minimal dimensional change under temperature fluctuations. This property makes it ideal for precision instruments, semiconductor equipment, and applications requiring high dimensional stability across wide temperature ranges.

Q What are the key mechanical strength properties of this quartz glass?

This quartz glass offers a compressive strength of 1100 MPa and a flexural strength of 67 MPa, combined with a Young's Modulus of 72,000 MPa and a Modulus of Rigidity of 31,000 MPa. Its Mohs hardness ranges from 5.5 to 6.5, providing excellent resistance to mechanical stress and surface scratching.

High-Quality Customized High-Purity Quartz Products from China Suppliers - Reliable Quartz Factory for Electronics and Research Manufacturers, Supplier

Product Description

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