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 Instruments Factory Manufacturer, Products

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High-Quality Customized Quartz Products from China Suppliers - High-Purity Quartz Instruments Factory Manufacturer, Products

Our high-purity quartz instruments, sourced directly from trusted China suppliers, encompass a diverse range of products, including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. These instruments are engineered for exceptional performance, showcasing high temperature resistance, corrosion resistance, superior light transmittance, and robust chemical stability. Widely utilized across various sectors such as semiconductors, photovoltaics, chemicals, and scientific research, our quartz products serve as essential tools in high-temperature processing, precision synthesis, and optical experiments. Partner with our factory to ensure process accuracy and reliable equipment performance.

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Product Description

Product Specifications & Mechanical Behavior

Mechanical Behavior / Property	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	2 mm – 20 mm

Frequently Asked Questions

Q What is the maximum continuous use temperature for fused quartz glass?

Fused quartz glass can withstand a long-term continuous use temperature of up to 1100 °C, and a short-term peak temperature of up to 1300 °C, making it highly suitable for demanding high-temperature applications.

Q What material is used to manufacture fused quartz glass, and why?

Fused quartz glass is manufactured from Silicon Dioxide (Natural Quartz). This material provides exceptional thermal stability, a very low thermal expansion coefficient (5.5 × 10⁻⁷ cm/cm·°C), and excellent optical transparency, making it ideal for precision applications.

Q What thickness options are available for fused quartz glass?

Fused quartz glass is available in a thickness range of 2 mm to 20 mm, and is produced in a circular shape. This range accommodates a wide variety of industrial and optical applications.

Q What are the purity (PPM) grades available for fused quartz glass?

Fused quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. Higher purity grades (lower PPM values) are typically selected for semiconductor and optical precision environments where contamination control is critical.

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

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means fused quartz glass experiences minimal dimensional change across a wide temperature range. This property ensures high dimensional accuracy, thermal shock resistance, and long-term structural stability in high-temperature environments.

Q What are the surface quality standards for fused quartz glass?

Fused quartz glass is produced to a bubble-free and line-free surface standard, with a transparent or colorless appearance. The high compressive strength of 1100 MPa and a Mohs hardness of 5.5–6.5 further ensure excellent surface integrity and durability under mechanical stress.

High-Quality Customized Quartz Products from China Suppliers - High-Purity Quartz Instruments Factory Manufacturer, Products

Product Description

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