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Customized High-Purity Quartz Products from China - Leading Suppliers and Factory for Semiconductor and Scientific Applications

Quartz instruments, manufactured from high-purity quartz material, are essential components in various industries, including semiconductor, photovoltaic, chemical, and scientific research. Our product range features quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their high temperature resistance, corrosion resistance, excellent light transmittance, and strong chemical stability, these instruments ensure process accuracy and reliable equipment operation in high-temperature processing, precision synthesis, and optical experiments. As a leading factory and key suppliers in China, we are committed to providing top-quality quartz solutions tailored to meet the demands of modern technology

Product Description

Material & Quality

Made from 99.99% high-purity fused silica, our large-diameter quartz tube is free of impurities, ensuring minimal thermal expansion and maximum resistance to thermal shock (can withstand rapid temperature changes from -20℃ to 1200℃). It is non-toxic, non-porous, and resistant to most acids (except hydrofluoric acid) and alkaline solutions, making it suitable for corrosive chemical processing.

Core Advantages

Superior thermal stability: Operates continuously at 1100℃, short-term use up to 1450℃
Excellent mechanical strength: High compressive strength and impact resistance, cracking during installation and use
Customization support: Cut-to-length, flanged ends, and drilled holes available per customer drawings
Long service life: Resists aging and oxidation even under prolonged high-temperature exposure

Key Application Fields of Large-Diameter Quartz Tubes

Large-diameter quartz tubes are essential components in various high-end industries, thanks to their excellent thermal stability, chemical inertness and high light transmittance.

Semiconductor Industry

They are widely used in diffusion furnaces, oxidation furnaces and ion implantation equipment for wafer processing. The high purity and corrosion resistance of quartz tubes can ensure no pollution to semiconductor materials during high-temperature processes.
Solar Energy Sector

Applied to the production line of photovoltaic cells and silicon wafers, they serve as the core components of high-temperature sintering and coating equipment, helping to improve the conversion efficiency of solar cells.
High-Temperature Heat Treatment & Metallurgy

Used as furnace linings and heating chambers in annealing furnaces, quenching furnaces and sintering furnaces, they can withstand continuous high-temperature operation up to 1100℃ and resist thermal shock.
Laboratory & Scientific Research

Employed in high-temperature chemical reactors, vacuum tubes and chemical vapor deposition (CVD) systems, suitable for harsh experimental environments such as strong acid corrosion and high-temperature pyrolysis.
Optical Fiber & Optoelectronics Industry

Serve as protective sleeves and drawing molds in optical fiber preform production, ensuring the purity and uniformity of optical fiber materials during the high-temperature drawing process.
Environmental Protection & Waste Treatment

Used in high-temperature waste gas incinerators and hazardous waste treatment equipment, taking advantage of their high-temperature resistance and chemical stability to decompose harmful substances.

Product Specifications

Product Details

⚡ Key Specifications at a Glance

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Material Silicon Dioxide

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Softening Point 1780°C

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Mohs Hardness 5.5 ~ 6.5

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Thickness 2MM – 20MM

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Compressive Strength 1100 MPa

📋 Full Mechanical & Physical Properties

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	2MM – 20MM

❓ Frequently Asked Questions

Q What material is this quartz glass made from?

This quartz glass is made from Silicon Dioxide (Natural Quartz), which ensures high purity, excellent optical clarity, and outstanding thermal stability. The transparent or colorless appearance reflects its natural raw material quality.

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

This 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. The softening point is 1780°C, and thermal processing is performed between 1750°C and 2050°C.

Q What thickness options are available for this quartz glass?

The quartz glass is available in thicknesses ranging from 2MM to 20MM in a circular shape, offering flexibility for a wide range of industrial and optical applications.

Q What PPM purity grades are available, and why does it matter?

The quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. Lower PPM values indicate higher purity, which is critical for semiconductor manufacturing, laboratory equipment, and other high-precision applications where contamination must be minimized.

Q What is the thermal expansion coefficient, and why is it important?

The low thermal expansion coefficient is 5.5 × 10⁻⁷ cm/cm·°C, which is exceptionally low. This means the material undergoes minimal dimensional change with temperature fluctuations, making it ideal for precision optics, high-temperature environments, and applications requiring dimensional stability.

Q How hard is this quartz glass, and does it resist surface damage?

With a Mohs hardness of 5.5 to 6.5, quartz glass offers good resistance to scratching and surface abrasion. The surface quality is guaranteed to be free of air bubbles and lines, ensuring optical clarity and structural integrity in demanding applications.

Packaging and Shipping

Why Choose Southeast Quartz?

Southeast Quartz relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier to global customers. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test, and purity test before leaving the factory to ensure stable performance, no impurities, and no leakage.