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 - China Suppliers and Factory for Semiconductor and Scientific Applications Supplier, Factory

1 / 5

High-Quality Customized High-Purity Quartz Products - China Suppliers and Factory for Semiconductor and Scientific Applications Supplier, Factory

High-purity quartz instruments are essential components in various high-tech industries, and our factory in China specializes in producing a wide range of these products. We offer quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their exceptional temperature and corrosion resistance, as well as excellent light transmittance and strong chemical stability, our quartz instruments are ideal for applications in semiconductors, photovoltaics, chemicals, and scientific research. As leading suppliers, we ensure that our products meet the highest standards, making them indispensable in high-temperature processing, precision synthesis, and optical experiments to guarantee accuracy and reliable equipment performance. Choose our China factory for high-quality quartz solutions tailored to your needs

Send Inquiry

Product Description

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 The 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 operating temperature for quartz glass made from natural silicon dioxide?

Quartz glass made from natural silicon dioxide (SiO₂) can withstand a short-term use temperature of up to 1300 °C and a long-term use temperature of up to 1100 °C. Its softening point is as high as 1780 °C, making it suitable for demanding high-temperature applications.

Q2 Why does quartz glass have such a low thermal expansion coefficient?

The ultra-low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C is a result of the unique amorphous structure of fused silica. This property minimizes thermal shock and dimensional change under rapid temperature fluctuations, which is critical for precision optical and industrial applications.

Q3 What thickness options are available for quartz glass discs?

Quartz glass discs are available in thicknesses ranging from 2 MM to 20 MM. Custom thicknesses within this range can typically be accommodated depending on the specific application requirements.

Q4 What does PPM grade mean in the context of quartz glass, and what grades are available?

PPM (parts per million) grade refers to the level of metallic impurities present in the quartz glass. Lower PPM values indicate higher purity. The available controlled grades are 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate purity level for semiconductor, optical, or industrial uses.

Q5 How does the compressive strength of quartz glass compare to its flexural strength?

Quartz glass exhibits a very high compressive strength of 1100 MPa, while its flexural (bending) strength is significantly lower at 67 MPa. This is typical for glass materials — they perform exceptionally well under compressive loads but are more susceptible to bending or tensile stresses, so care should be taken in structural applications.

Q6 Is the surface of this quartz glass free of defects such as air bubbles or striae?

Yes. The quartz glass is manufactured to a no air bubble, no line (striae-free) surface standard. It is transparent and colorless, ensuring optical clarity and consistent performance in light transmission and precision applications.

High-Quality Customized High-Purity Quartz Products - China Suppliers and Factory for Semiconductor and Scientific Applications Supplier, Factory

Product Description

Related Products

Wholesale Premium High-Purity Quartz Boat for High-Temperature Processes - China Suppliers and Factory Factory, Products

Custom China Suppliers - Oversized Fused Quartz Tubes Factory for High-Temperature Applications Suppliers, Products

Wholesale Customized High-Purity Quartz Products from China Suppliers - Factory Direct for Semiconductor and Optical Applications Supplier, Products

Wholesale Custom Quartz Furnace Tube for Laboratory & Industrial Use | China Suppliers & Factory Direct Supplier, Factory

High-Quality High-Temperature Resistant Quartz Lamp Holder for Industrial Use - China Suppliers & Factory Manufacturer, Manufacturers

Wholesale Premium High-Temperature Quartz Boats from China Suppliers - Fused Silica Factory for Semiconductor Processes Product, Products

Wholesale High-Quality Oversized Fused Quartz Tubes from China Suppliers | Factory for High-Temperature Applications Manufacturers, Supplier

High-Quality High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory | China Suppliers & Factory Supplier, Factories

Wholesale China Suppliers of Fused Silica Quartz Plates - High Temperature Resistant Quartz Glass Factory Manufacturer, Product

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