Cylindrical closed quartz tube

What can this product solve for you?

Q: I need a transparent material that can maintain stability under extreme high temperatures. What are my options?  

Answer: The cylindrical enclosed quartz tube can withstand high temperatures above 1200 ℃ and has an extremely low coefficient of thermal expansion, making it an ideal choice for high-temperature observation and reaction vessels.

Q: My experiment requires extremely high material purity. How can I avoid contamination?  

Answer: Our quartz tubes are made of high-purity quartz sand with a silicon dioxide content of ≥ 99.99%. They hardly react with most acids, ensuring zero pollution in your process.

Q: Can I customize a transparent closed container with a special size and shape?  

Answer: We specialize in providing full-size customization services, ranging from a diameter of 2mm to 300mm, with a length of up to 2000mm. The closed end can be made into a round head, flat head, or special shape.

Q: What are the guarantees for the accuracy and consistency of quartz tubes in the semiconductor and optoelectronic fields?  

Answer: We use CNC precision machining and laser detection, with a wall thickness uniformity deviation of<± 0.1mm, fully meeting the stringent requirements of high-end manufacturing fields.

Cylindrical closed quartz tube is a transparent tubular container made of high-purity fused silica. One or both ends are completely sealed, with excellent physical and chemical stability. The product adopts arc welding technology to achieve seamless sealing, ensuring sealing integrity and structural strength.

Key features and advantages

1. Excellent physical and chemical properties

-High temperature resistance: softening point up to 1730 ℃, long-term use temperature of 1200 ℃, short-term up to 1450 ℃

-Thermal stability: The coefficient of thermal expansion is only 5.5 × 10 ⁻⁷/℃, which can withstand rapid temperature changes without rupture

-Chemical inertness: Almost no reaction with other acids except hydrofluoric acid and hot phosphoric acid

-High purity: SiO ₂ content ≥ 99.99%, heavy metal content<10ppm

-Optical performance: Good transparency in the ultraviolet to infrared wavelength range (170nm-2500nm)

2. Precision manufacturing process

-Sealing technology: using hydrogen oxygen flame for melting and sealing, without bubbles or crystals

-Surface treatment: Flame polishing, acid washing, or mechanical polishing can be provided according to demand

-Quality control: Each batch of products undergoes pressure testing, transmittance testing, and dimensional accuracy measurement

Specifications and Customization Services

Standard specification range

-Diameter range: 2mm -300mm (up to 500mm for special requirements)

-Length range: 10mm -2000mm (adjustable according to diameter ratio)

-Wall thickness selection: 0.5mm-20mm, customized according to the pressure used

-Closure type: single end closure, double end closure, with branch closure

customization capability

1. Size customization: rapid response production for non-standard diameters, lengths, and wall thicknesses

2. Shape customization: conical closure, spherical closure, and irregular port design

3. Function customization: pre-set internal structure, multi chamber design, interface integration

4. Surface treatment: frosted treatment, scale marking, special coating

5. Supporting services: pipe rack design, sealing components, installation guidance

Main application areas

1. Semiconductor and Photovoltaic Industry

-Diffusion tubes and oxidation tubes in wafer processing

-PECVD process tube in photovoltaic cell manufacturing

-Reaction vessel for LED epitaxial growth

2. Optoelectronics and Lighting Industry

-High power laser casing

-Special light source packaging

-UV disinfection equipment lamp tube set

3. Laboratories and research facilities

-Observation window for high temperature and high pressure reactor

-Single crystal growth ampoule

-Thermal analysis instrument sample tube

4. Industrial heating system

-Infrared heater protective cover

-High temperature observation window

-Thermocouple protection tube

5. Medical and special equipment

-Sterilization equipment observation window

-Analytical instrument flow pool

-Special environment sensor housing

Customer Application Cases

Case 1: European semiconductor equipment manufacturer

Requirement: High temperature resistant observation tube for wafer annealing process, requiring a temperature resistance of over 1300 ℃ and no internal contamination

Solution: Provide double ended closed quartz tubes with a diameter of 150mm and a length of 1200mm, with inner walls treated with electrolytic polishing

Result: Customer production line yield increased by 2.3%, replacement cycle extended from 3 months to 8 months

Case 2: American research institutions

Requirement: Special sample container for synchrotron radiation experiments, requiring high vacuum sealing and high X-ray transmittance

Solution: Customized thin-walled quartz tube with a wall thickness of 0.8mm, equipped with a dedicated vacuum flange interface

Result: Successfully completed a continuous 200 hour experiment, maintaining a vacuum level of 10 ⁻⁶ Pa

Case 3: Japanese optoelectronic companies

Requirement: High power ultraviolet LED packaging tube, requiring 365nm ultraviolet light transmittance>90%

Solution: Using ultra-high purity quartz material to optimize the curvature of the tube wall and reduce light loss

Result: LED output efficiency increased by 15%, product lifespan exceeded 10000 hours

Case 4: Chinese Photovoltaic Enterprises

Requirement: Large quartz tube with a diameter of 280mm for PECVD process, requiring extremely high dimensional consistency

Solution: Develop specialized molds and rotary firing processes to achieve consistency in mass production

Result: Assisted customers in expanding production capacity by three times, with a stable product qualification rate of over 99.5%

Get your customized solution

Whether you need a standard specification cylindrical enclosed quartz tube or a customized design for special application challenges, our engineering team is always ready to provide professional support for you. Click to contact us for free sample application and technical consultation. With 25 years of quartz processing experience, we can solve container problems in high-temperature and high-purity environments for you.

Luverre Quartz manufactures and sells a wide range of high quality fused quartz glass, including fused quartz tubes, fused quartz plates, fused quartz rods, fused quartz windows, fused quartz crucibles, fused quartz boats, fused quartz flanges, fused quartz beakers, fused quartz glass instruments, and more. We can meet all kinds of customized requirements for fused quartz glass products.

For more information, please feel free to contact us.

Why choose us?

1.We are more experienced.

We have over 19 years production experience of quartz items.

2.We are more efficient.

We reply customers’ requests within 24 hours and we have high efficient production, engineers and sales team.

3.Our quality is more guaranteed.

We control the quality from quartz lumps to quartz sand and then quartz products, we have better and stricter quality control than other manufactures.

4.We are able to produce more difficult quartz products.

We have large grinding platforms and precision etching machines which enable us to manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more.

5. About 20 years of professional experience

-Focusing on the manufacturing of quartz products for a quarter century

-The average working experience of the technical team exceeds 15 years

6.Global Service Network

-Our products are exported to over 40 countries and regions including Europe, America, Japan, South Korea, and the Middle East

-Multi language technical support (English, German, French, Spanish, Russian, Japanese)