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High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory | China Suppliers & Factory

Our premium quartz rods are high-performance cylindrical products crafted from fused silica (SiO₂ ≥ 99.99%). Manufactured in China, they exhibit exceptional high-temperature resistance, with a softening point of approximately 1730°C and long-term usability at temperatures up to 1100°C. These rods offer excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, making them resistant to most acids, with the exception of HF. Additionally, they provide outstanding electrical insulation. As a trusted supplier and factory of quartz products, we cater to a wide range of industries, including optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment, positioning our quartz rods as essential materials for precision applications in harsh environments.

Quartz rods are cylindrical components made from high-purity silicon dioxide (SiO₂), produced by melting natural or synthetic quartz and forming them into solid rods through advanced drawing or molding processes.

As a key semi-finished product, our quartz rods serve as the foundation for further fabrication into tubes, supports, or optical components, meeting the diverse needs of various industries.

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

Cross-sectional Dimensions, Tolerances & Standard Lengths

Cross-sectional Dimensions	Tolerances	Standard Lengths
3×3	±0.1	100–1000
4×4	±0.1	100–1000
5×5	±0.1	100–1000
6×6	±0.15	100–1000
8×8	±0.15	100–1000
10×10	±0.2	100–1000
15×15	±0.2	100–500
20×20	±0.25	100–500

Frequently Asked Questions

Q What do the cross-sectional dimensions in the table represent?

The cross-sectional dimensions (e.g., 3×3, 10×10) refer to the width and height of the material's cross-section in millimeters, indicating the square profile size of each piece.

Q Why do larger cross-sectional dimensions have higher tolerances?

As the cross-sectional size increases, the manufacturing process becomes more complex, and minor variations are harder to control. Larger profiles such as 20×20 have a tolerance of ±0.25 mm, reflecting the natural limits of precision machining at greater scales.

Q What does the standard length range (e.g., 100–1000) mean?

The standard length range indicates the available cut lengths in millimeters for each profile size. For example, a range of 100–1000 mm means the product can be supplied in lengths between 100 mm and 1000 mm.

Q Why are the standard lengths shorter for larger profiles like 15×15 and 20×20?

Larger cross-sectional profiles (15×15 and 20×20) have a maximum standard length of 500 mm instead of 1000 mm. This is typically due to material weight, structural rigidity requirements, and manufacturing constraints associated with bigger cross-sections.

Q Can custom lengths outside the standard range be ordered?

Custom lengths beyond the listed standard ranges may be available depending on the manufacturer's capabilities. It is recommended to contact the supplier directly to discuss specific requirements outside the standard specifications.

Q How are the tolerance values measured and verified?

Tolerances are typically measured using precision instruments such as micrometers or calipers, and verified against the specified ± values in millimeters. Quality control processes ensure each batch meets the stated dimensional accuracy before delivery.

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.