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

Our high-performance quartz rod, made from fused silica (SiO₂ ≥ 99.99%), is an essential product for various applications. With exceptional high-temperature resistance (softening point ~1730°C and long-term usability at 1100°C), this rod also showcases excellent UV-IR transmittance, minimal thermal expansion, and outstanding chemical inertness (resistant to most acids except HF). Its superb electrical insulation properties make it ideal for use in optics, semiconductors, lasers, lab instruments, and high-temperature equipment. As a leading supplier in China, our quartz rods are perfect for precision applications and harsh environments.

Manufactured in our state-of-the-art factory, the quartz rod is a cylindrical component created from high-purity silicon dioxide (SiO₂). We produce these rods by melting premium natural or synthetic quartz and forming them through innovative drawing or molding processes.

Quartz rods are fundamental semi-finished materials that can be further processed into tubes, supports, and optical components, making them vital to numerous 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
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 cross-sectional dimensions are available?

Available cross-sectional dimensions range from 3×3 mm up to 20×20 mm, including sizes 3×3, 4×4, 5×5, 6×6, 8×8, 10×10, 15×15, and 20×20.

Q What are the standard length ranges for these dimensions?

Most dimensions (3×3 through 10×10) are available in standard lengths of 100–1000 mm. Larger sizes such as 15×15 and 20×20 are available in lengths of 100–500 mm.

Q What tolerance levels can I expect for smaller dimensions?

Smaller dimensions (3×3, 4×4, and 5×5) carry a tight tolerance of ±0.1 mm, ensuring high precision for applications requiring close-fit components.

Q Why do larger cross-sections have higher tolerances?

As cross-sectional dimensions increase, slight variations in material behavior during manufacturing make tighter tolerances more challenging. Larger sizes such as 20×20 carry a tolerance of ±0.25 mm to account for this.

Q Can custom lengths outside the standard ranges be ordered?

The table reflects standard length offerings. For custom lengths outside the listed ranges, it is recommended to contact the supplier directly to discuss specific requirements and feasibility.

Q Which dimension offers the best balance of tolerance and length flexibility?

The 10×10 dimension offers a good balance, providing a tolerance of ±0.2 mm while still being available in the full standard length range of 100–1000 mm, making it suitable for a wide variety of 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.