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.

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.

Custom Customized Quartz Products from China Suppliers - High-Purity Quartz Instruments from Factory Product, Products

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Custom Customized Quartz Products from China Suppliers - High-Purity Quartz Instruments from Factory Product, Products

Q: 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.

Our quartz instruments, crafted from high-purity quartz material, represent the pinnacle of quality and durability. As a leading factory in China, we offer a comprehensive range of products including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. These instruments are renowned for their remarkable characteristics such as high temperature resistance, excellent corrosion resistance, superior light transmittance, and strong chemical stability. Our quartz products find extensive applications in various fields including semiconductors, photovoltaics, chemicals, and scientific research. As trusted suppliers, we provide core instruments essential for high-temperature processing, precision synthesis, and optical experiments, ensuring unparalleled process accuracy and reliable equipment operation.

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Product Description

Product Specifications

Property Parameter	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 is the maximum operating temperature of fused quartz glass?

Fused quartz glass can withstand a short-term use temperature of up to 1300 °C and a long-term continuous use temperature of up to 1100 °C. Its thermal processing temperature ranges from 1750 °C to 2050 °C, making it one of the most thermally stable glass materials available.

Q Why does fused quartz glass have such a low thermal expansion coefficient?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C is a result of its amorphous silicon dioxide (SiO₂) structure. This property gives fused quartz exceptional thermal shock resistance, allowing it to endure rapid temperature changes without cracking.

Q What does the PPM grade mean for quartz glass and why does it matter?

PPM (parts per million) grade refers to the level of metallic impurity content within the quartz glass. Available in controlled grades of 10, 20, and 100 PPM, lower PPM values indicate higher purity, which is critical for semiconductor, optical, and high-precision industrial applications where contamination must be minimized.

Q What thickness options are available for quartz glass?

Quartz glass is available in thicknesses ranging from 2 mm to 20 mm. The circular shape and wide thickness range make it highly versatile for various industrial, laboratory, and optical applications.

Q How does the compressive strength of fused quartz compare to its flexural strength?

Fused quartz has a very high compressive strength of 1100 MPa, making it highly resistant to compression forces. However, its flexural (bending) strength is significantly lower at 67 MPa, which is typical for glass materials. This means quartz glass performs best in applications where compressive rather than bending loads are applied.

Q Is fused quartz glass the same as regular glass?

No. Fused quartz glass is made from pure Silicon Dioxide (natural quartz) and is fundamentally different from standard soda-lime glass. It offers superior thermal resistance, a much lower thermal expansion coefficient, higher purity, and better optical transparency — particularly in UV wavelengths — making it suitable for demanding scientific and industrial environments.

Custom Customized Quartz Products from China Suppliers - High-Purity Quartz Instruments from Factory Product, Products

Product Description

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