High Quality Heat Resistant Custom Large Diameter Quartz Glass Tube

Silica Quartz Glass Tubes:

Customized Clear Heat Resistant Quartz Glass Tube made from 99.99% pure quartz, offering excellent visual and chemical performance. It operates at temperatures up to 1200℃ with a softening point of 1730℃, ensuring high durability and versatility. The product supports various processing services including bending, welding, punching, cutting, and molding, meeting diverse application needs in optical, semiconductor, and industrial fields. Certified with IEC62321, it ensures compliance with international safety standards, enhancing buyer confidence for global market access.

Key Characteristics and Advantages

Advantages of Quartz Tubes

Quartz tubes, made from fused silica, offer a unique combination of properties that make them highly valuable in various industrial, scientific, and commercial applications.

Here are the key advantages:

• High Temperature Resistance

Quartz tubes can withstand extremely high temperatures (up to 1100℃ for prolonged use and up to 140℃ for shothem rt-term use) without softening or deforming. This makes ideal for high-temperature furnaces, diffusion processes, and thermocouple protection sheaths.

• Excellent Thermal Shock Resistance

They can endure rapid and significant temperature changes without cracking. This is due to their very low coefficient of thermal expansion. A quartz tube can be taken directly from a red-hot furnace and plunged into cold water without breaking.

• High Purity and Chemical Inertness

Fused quartz is exceptionally pure and inert to most chemicals. It does not contaminate sensitive processes and is highly resistant to acids (except for hydrofluoric acid and hot phosphoric acid). This is critical in semiconductor manufacturing and laboratory chemistry.

• Superb Optical Properties

Quartz tubes have excellent transmission properties across a wide spectral range, from ultraviolet (UV) to infrared (IR) light. This "broad spectral transmission" makes them perfect for UV lamps, halogen lamp enclosures, and various optical applications.

• High Electrical Insulation

It is an excellent electrical insulator, even at high temperatures. This property is essential for use in semiconductor processing equipment and high-temperature sight glasses for furnaces.

• Low Thermal Conductivity

Despite its transparency and temperature resistance, quartz is a poor conductor of heat. This helps in maintaining stable temperatures within a system and improves energy efficiency.

• High Mechanical Strength

Quartz has high mechanical strength and rigidity, which allows it to maintain its structural integrity under vacuum or pressure conditions.

• Transparency and Visibility

The glass-like clarity of quartz tubes allows for visual monitoring of processes inside reactors, furnaces, and fluid systems without opening the chamber or interrupting the process.

Main Application Areas:

Applications and Uses of Quartz Tubes

• Lighting Industry

This is one of the most common applications.

• Halogen Lamps: The tube acts as the envelope for the halogen gas and tungsten filament. It can withstand the high temperature and prevents the blackening of the glass.
• UV Lamps: Used in germicidal, sterilization, and EPROM eraser lamps because quartz has excellent transmission of ultraviolet (UV) light.
• High-Intensity Discharge (HID) Lamps: Such as metal halide and high-pressure sodium lamps.
• Xenon Lamps & Infrared Heaters: Used for their high-intensity output and thermal stability.

• Semiconductor Industry

This is a critical high-tech application where purity is paramount.

• Diffusion Furnace Tubes: Used in the thermal oxidation and diffusion processes for manufacturing silicon wafers. They provide a clean, high-temperature environment.
• Wafer Carriers (Boat): Used to hold silicon wafers during high-temperature processing.
• CVD (Chemical Vapor Deposition) Reactors: Serve as the reaction chamber where thin films are deposited onto substrates.

• Optics and Photonics

• Windows and Lenses: Used in specialized optical systems for UV and IR applications where ordinary glass is opaque.
• Laser Components: Used in the construction of laser tubes and optical cavities, especially for excimer and other gas lasers.
• Fiber Optics Preforms: The starting material from which optical fibers are drawn.

• Chemical and Laboratory Equipment

• Laboratory Glassware: For experiments involving high temperatures, corrosive chemicals, or UV light (e.g., beakers, flasks, reaction vessels).
• Heat Exchangers: Used in highly corrosive environments.
• Sight Glasses: Installed on reactors or pipelines to visually monitor processes under high temperature or corrosive conditions.
• Precision Analytical Cells: Used in spectrophotometers for UV-VIS spectroscopy.

• Heating Elements

• Sheaths for Heating Elements: Quartz tubes are often used as protective sheaths for metal or silicon carbide heating elements in industrial furnaces and household appliances (like electric stoves and heaters), providing electrical insulation and physical protection.

• Solar Industry

• Photovoltaic Cell Production: Used in the diffusion process to create the p-n junctions in silicon solar cells, similar to semiconductor manufacturing.
• Concentrated Solar Power (CSP) Receivers: Used as the enclosure for the heat absorber in some high-temperature solar thermal systems.

• Other Industrial Applications

• Heat Treatment Furnaces: For processes like annealing, sintering, and brazing of metals.
• Pyrometry: Used as protective tubes for thermocouples and optical pyrometers in high-temperature environments.

Technical specifications