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

Quartz instruments, manufactured from high-purity quartz material, encompass a diverse range of products including quartz tubes, quartz boats, quartz crucibles, quartz reactors, quartz spiral tubes, and quartz reaction vessels. Known for their high temperature resistance, corrosion resistance, exceptional light transmittance, and remarkable chemical stability, these products are indispensable in various applications. Widely utilized across industries such as semiconductor, photovoltaic, chemical processing, and scientific research, they serve as essential tools in high-temperature processing, precision synthesis, and optical experiments. As leading suppliers and a reputable factory in China, we ensure our quartz instruments meet the highest standards, guaranteeing process accuracy and reliable equipment operation for our global clientele

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

📋 Mechanical Behavior & Material 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	72000 MPa
Modulus of Rigidity	31000 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 for fused quartz glass?

Fused quartz glass 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 extreme thermal environments.

Q Why does fused quartz glass have such excellent thermal shock resistance?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means the material expands and contracts very minimally under temperature changes, greatly reducing internal stress and providing outstanding thermal shock resistance compared to standard glass.

Q What raw material is used to produce this fused quartz glass?

This fused quartz glass is manufactured from Silicon Dioxide (Natural Quartz), ensuring high purity and consistent optical and mechanical properties across all production batches.

Q What thickness options and shapes are available?

The fused quartz glass is available in a circular shape with thickness options ranging from 2 mm to 20 mm, accommodating a wide range of industrial and optical application requirements.

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

Three controlled purity grades are offered: 10 PPM, 20 PPM, and 100 PPM. Higher purity (lower PPM) is critical for semiconductor manufacturing, optical instruments, and laboratory applications where trace contamination could affect performance or product quality.

Q What does "No Air Bubble, No Line" surface specification mean?

This specification guarantees that the glass surface and interior are free from internal bubbles and striae (optical distortion lines). This ensures superior optical clarity, uniform light transmission, and structural integrity — essential for precision optical and high-temperature industrial 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.