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

Our high-performance quartz rods are crafted from fused silica (SiO₂ ≥ 99.99%) and are ideal for various industrial applications. These cylindrical products boast exceptional high-temperature resistance, with a softening point around 1730°C and suitability for long-term use at temperatures up to 1100°C. They exhibit excellent UV-IR transmittance, low thermal expansion, and remarkable chemical inertness, being resistant to most acids except HF. Additionally, quartz rods provide outstanding electrical insulation, making them essential for precision work in optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment.

Manufactured in our state-of-the-art factory in China, these quartz rods are produced by melting high-purity silicon dioxide and forming them into solid cylindrical shapes through advanced drawing or molding techniques. Our products serve as vital semi-finished materials for further fabrication into tubes, supports, or optical components.

As a leading supplier based in China, we are committed to delivering high-quality quartz rods that meet the demanding standards of harsh-environment applications.

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

Cross-sectional Dimensions (mm)

Tolerances (mm)

Standard Lengths (mm)

💬 Frequently Asked Questions

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 measured in millimeters. These square profiles define the physical size of each piece.

Why do larger cross-sectional sizes have higher tolerances?

Larger cross-sectional dimensions naturally require slightly wider tolerances (e.g., ±0.25 mm for 20×20) due to the increased material volume and the inherent challenges in maintaining extremely tight precision at larger scales during manufacturing.

Why are the standard lengths shorter for larger sizes (15×15 and 20×20)?

Larger cross-sectional profiles (15×15 and 20×20) are available in standard lengths of 100–500 mm rather than 100–1000 mm. This is typically due to weight, handling constraints, and the practical applications for which these sizes are commonly used.

Can custom lengths be ordered outside the standard range?

Standard lengths listed in the table represent the most commonly stocked sizes. For custom lengths outside these ranges, it is recommended to contact the supplier directly to discuss availability, minimum order quantities, and lead times.

What measurement unit is used for the dimensions and tolerances?

All cross-sectional dimensions, tolerances, and standard lengths in this table are expressed in millimeters (mm), which is the standard unit used in precision manufacturing and engineering specifications.

Which size offers the tightest tolerance and is best suited for high-precision applications?

The smaller sizes — 3×3, 4×4, and 5×5 — offer the tightest tolerance of ±0.1 mm, making them the most suitable choices for high-precision applications where dimensional accuracy is critical.

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.