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High Purity Quartz Rods from China Suppliers - Fused Silica Rods for Semiconductor & Laboratory Applications

Quartz rods are high-performance cylindrical products crafted from high-purity fused silica (SiO₂ ≥ 99.99%). Renowned for their exceptional high-temperature resistance, with a softening point around 1730°C and long-term usage capabilities at 1100°C, these rods excel in various applications. They provide excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, making them resistant to most acids except hydrofluoric acid (HF). Additionally, quartz rods offer outstanding electrical insulation properties, Manufactured in China by leading suppliers and factories, quartz rods serve as essential semi-finished materials. They are widely used in optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment. Ideal for precision applications and harsh environments, our quartz rods are the perfect choice for businesses seeking reliable and high-quality materials

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

All dimensions are in millimeters (mm). Tolerances apply to both width and height of the cross-section.

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 refer to?

The cross-sectional dimensions refer to the width and height of a square bar or profile measured in millimeters (mm). For example, a 10×10 dimension means the bar is 10 mm wide and 10 mm tall.

Q What do the tolerance values (e.g., ±0.1, ±0.2) mean?

Tolerances indicate the allowable deviation from the specified dimension during manufacturing. For instance, a tolerance of ±0.1 mm means the actual dimension can be up to 0.1 mm larger or smaller than the nominal size and still be within acceptable quality standards.

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

Larger profiles are more challenging to manufacture with the same level of precision as smaller ones due to material behavior, tooling limitations, and thermal expansion during processing. As a result, slightly wider tolerances are permitted for larger dimensions to maintain practical and cost-effective production.

Q What are the standard length ranges, and can custom lengths be ordered?

Standard lengths range from 100 mm to 1000 mm for smaller sizes (3×3 to 10×10), and from 100 mm to 500 mm for larger sizes (15×15 and 20×20). Custom lengths outside these ranges may be available upon request — please contact us for specific requirements.

Q Why is the maximum standard length shorter for 15×15 and 20×20 sizes?

Larger cross-sectional profiles are heavier and more susceptible to warping or structural stress over longer lengths. Limiting the standard length to 500 mm for these sizes helps ensure dimensional stability, easier handling, and consistent quality during shipping and application.

Q Which size should I choose for my application?

The right size depends on your specific application requirements, including load-bearing needs, fitting constraints, and precision demands. Smaller sizes (3×3 to 6×6) are ideal for precision components and light-duty applications, while larger sizes (10×10 to 20×20) are better suited for structural or heavy-duty uses. If you are unsure, our technical team can assist you in selecting the most appropriate dimension.

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.