Cylindrical, open-ended, opaque fused quartz tubing is an industrial tubing product made from high-purity fused quartz. The tubing has a cylindrical shape with open ends at both ends, and its surface appears milky white or semi-translucent to opaque. This product offers excellent high-temperature resistance, thermal stability, chemical stability, and optical diffuse reflection properties, making it suitable for applications such as high-temperature furnace tubes, semiconductor diffusion, optical shielding, heat treatment protection, laboratory equipment, and specialized industrial equipment. We offer custom processing services—including inner diameter, outer diameter, length, wall thickness, opening configuration, and surface finish—based on customer drawings and operational requirements.

Core features:

Opacity: Through special processing, the surface presents a uniform matte or diffuse reflection effect, effectively blocking light penetration, suitable for scenes that require shading or insulation.

High temperature resistance: quartz material can withstand high temperature above 1000 ℃ for a long time, and 1450 ℃ for a short time, with excellent thermal stability.

Chemical inertness: It has strong resistance to corrosive substances such as acids, bases, and salts, and is suitable for harsh chemical environments.

Structural stability: Designed with cylindrical openings at both ends, with high dimensional accuracy (tolerance ± 0.1mm), smooth inner walls, and the ability to withstand high air pressure or vacuum environments.

Low thermal expansion coefficient: The thermal expansion coefficient is only 5.5 × 10 ⁻⁷/℃, reducing the risk of deformation in high-temperature environments.

Typical parameters:

Material: high-purity quartz (SiO ₂ content ≥ 99.9%)

Transmittance:<1% (opaque treatment)

Temperature resistance range: -270 ℃ to 1450 ℃

Density: 2.2g/cm ³

Compressive strength: ≥ 50MPa

Application scenarios and solutions

This product, with its unique performance, can address the following industry pain points in a targeted manner:

Industrial high-temperature shading and insulation

Application scenarios: Observation windows or protective sleeves for high-temperature equipment such as metal smelting, heat treatment furnaces, and semiconductor diffusion furnaces.

Addressing pain points: Traditional transparent quartz tubes are prone to internal light pollution or personnel glare at high temperatures, while opaque designs can completely block light while reducing heat loss and energy consumption through low thermal conductivity.

Chemical corrosion environment protection

Application scenarios: Chemical reaction vessels, electroplating tanks, laboratory corrosive gas pipelines.

Solution to pain points: ordinary metal or plastic pipes are easily eroded by corrosive media, and quartz pipes can operate stably for a long time to avoid downtime costs caused by frequent replacement.

Vacuum and high pressure system components

Application scenarios: Vacuum coating equipment, high-energy physics experimental devices, nuclear industry pipelines.

Addressing pain points: Its low gas permeability and high structural strength can maintain system vacuum while withstanding extreme pressure changes, ensuring experimental or production safety.

Optical instrument shading components

Application scenarios: laser processing equipment, spectral analyzer, astronomical telescope optical path isolation.

Addressing pain points: Accurately controlling the propagation path of light, avoiding stray light interference, and improving instrument measurement accuracy.

Special lighting and display

Application scenarios: Infrared heating lampshade, stage lighting shade, high-intensity discharge lamp (HID) reflector cavity.

Addressing pain points: Achieving directional light output through opaque design, reducing energy loss, while withstanding high temperature lamp environments.

Customized service

To meet diverse needs, we offer the following flexible customization options:

Custom sizing

Outer diameter range: 2mm to 300mm

Wall thickness range: 0.5mm to 20mm

Length range: 10mm to 3000mm (can be cut in sections)

surface treatment

Matte treatment: enhances diffuse reflection effect, suitable for uniformly shaded scenes.

Coating process: Wear resistant, anti-static or high reflective coatings can be selected.

End face processing: Provide flat, chamfered, polished, or threaded interfaces.

performance enhancement

Doping modification: Enhancing radiation resistance or conductivity by adding metal oxides.

Composite structure: Combined with ceramic and metal lining, it meets the dual requirements of high temperature resistance and high strength.

Frequently Asked Questions

What is an opaque fused quartz tube with open ends?

It is a fused quartz tube that is open at both ends and has an opaque wall. Compared to ordinary transparent quartz tubes, its surface offers better light shielding and diffuse reflection properties, while still retaining the characteristics of fused quartz, such as high-temperature resistance, low thermal expansion, and corrosion resistance.

What is the difference between opaque fused quartz tubes and transparent quartz tubes?

Transparent quartz tubes have high light transmittance and are suitable for applications requiring high light transmission, observation, or UV transmission; opaque fused quartz tubes are better suited for operating conditions that require light shielding, uniform heating, reduced radiation interference, or protection from direct strong light. While the two share a similar material composition, they differ in optical performance and application scenarios.

What dimensions can be customized for this product?

We can customize the inner diameter, outer diameter, length, wall thickness, straightness, end face flatness, and opening shape. Standard specifications are available in standard sizes, while special dimensions can be fabricated to meet specific equipment requirements.

Can you manufacture according to drawings?

Yes. Once the customer provides drawings, samples, or specific parameters, we can evaluate the material, tolerances, manufacturing methods, and inspection requirements, and provide a corresponding production plan.

In which industries are these products used?

They are primarily used in the semiconductor, photovoltaic, heat treatment, high-temperature furnace, laboratory, optical equipment, vacuum equipment, specialized heating systems, and industrial inspection sectors.

Do you support export shipments?

Yes. We provide customized manufacturing, packaging, inspection, and export support services to customers worldwide, and can arrange appropriate delivery methods based on the procurement requirements of customers in different countries.

The cylindrical opaque quartz tube with two ends open has become an ideal choice for high-temperature industry, scientific research experiment and special lighting fields due to its excellent temperature resistance, corrosion resistance and shading performance. We are committed to providing customized services and technical support to help customers solve material problems under complex working conditions, achieve cost reduction, efficiency improvement, and performance upgrades.

Luverre Quartz is a manufacturer specializing in quartz tubes and other quartz items.We have over 18 years experience with the production of quartz tubes, we will be your reliable partner on quartz tubes and other quartz items.

Luverre Quartz can manufacture customized quartz tubes in various shapes, such as spiral, square, round, with processing including cutting, bending, welding, etc., and available in different colors, such as transparent quartz tubes, opaque quartz tubes, milky white quartz tubes, red quartz tubes, and so on.