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

Our quartz rods are high-performance cylindrical products crafted from premium fused silica (SiO₂ ≥ 99.99%), sourced from leading China suppliers. These rods exhibit exceptional high-temperature resistance, with a softening point around 1730°C and the ability to withstand long-term usage at 1100°C. They also boast excellent UV-IR transmittance, minimal thermal expansion, and outstanding chemical inertness, making them resistant to most acids, with the exception of HF. Additionally, these quartz rods provide superb electrical insulation. Commonly utilized in optics, semiconductors, lasers, laboratory instruments, and high-temperature equipment, they are essential materials for precision applications and harsh environments, manufactured in our state-of-the-art factory.

A quartz rod is a cylindrical component made from high-purity silicon dioxide (SiO₂). Produced by melting natural or synthetic quartz, our products are formed into solid rods through advanced drawing or molding processes, ensuring reliability and quality.

These quartz rods act as fundamental semi-finished materials, ideal for further fabrication into tubes, supports, or optical components, catering to diverse industrial needs.

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

🔹 What do the cross-sectional dimensions refer to in this table?

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 dimensions define the physical size profile of each piece.

🔹 What does the tolerance value mean, and why does it vary?

Tolerance indicates the allowable deviation (in mm) from the specified dimension during manufacturing. Larger cross-sections typically have slightly higher tolerances (e.g., ±0.25 for 20×20) due to the increased complexity of precision machining at larger scales.

🔹 Why are the standard lengths shorter for larger cross-sections (15×15 and 20×20)?

Larger cross-section sizes (15×15 and 20×20) have a maximum standard length of 500mm rather than 1000mm. This is typically due to material handling, structural stability, and manufacturing process limitations associated with larger profiles.

🔹 Can I order custom lengths outside the standard range listed?

The table reflects standard available lengths. For custom lengths outside the listed range (100–1000mm or 100–500mm), it is recommended to contact the supplier or manufacturer directly to discuss custom cutting or special order options.

🔹 Are all dimensions listed available for immediate stock ordering?

Availability may vary depending on the supplier's current inventory. While the dimensions listed represent standard product offerings, it is advisable to confirm stock availability — especially for larger sizes like 15×15 and 20×20 — before placing a bulk order.

🔹 What material standard or industry specification do these dimensions comply with?

The cross-sectional dimensions and tolerances listed are typically aligned with standard precision engineering or manufacturing specifications. The exact material standard (such as ISO, DIN, or ASTM) may vary by product type and region — please refer to the product datasheet or contact the supplier for specific compliance information.

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.