Large-diameter opaque quartz tubes are high-temperature-resistant, corrosion-resistant industrial quartz products made from high-purity silicon dioxide, featuring excellent thermal insulation, thermal stability, and chemical inertness. Their opaque structure effectively scatters thermal radiation, making them suitable for applications such as high-temperature furnace tubes, semiconductor diffusion, photovoltaic annealing, vacuum coating, and high-temperature laboratory equipment. We offer comprehensive customization options for outer diameter, wall thickness, length, and tolerances to meet the diverse needs of global customers for precision quartz components.

Compared with traditional transparent quartz tubes, the large diameter design endows it with higher mechanical strength, better thermal shock resistance (resistance to rapid cooling and heating), and stronger load capacity. The large-diameter opaque quartz tubes we produce are known for their extremely high purity, excellent thermal stability, extremely low coefficient of thermal expansion, and outstanding electrical insulation. They can maintain stable physical and chemical properties in extremely harsh high-temperature environments and are essential key foundational materials in many high-end industrial fields.

Core features:

High temperature resistance: It can work stably in an environment of 1100 ℃ for a long time, and can withstand temperatures up to 1450 ℃ in the short term, suitable for extreme thermal conditions.

Chemical stability: It has excellent corrosion resistance to acids, bases, and organic solvents, avoiding oxidation and corrosion problems of traditional metal pipes.

Thermal stability: extremely low thermal expansion coefficient (5.5 × 10 ⁻⁷/℃), reducing the risk of cracking caused by thermal stress.

Opaque design: achieved through special processes to block light and meet the needs of scenes that require avoiding light interference or protecting internal components.

Structural strength: High density quartz material has strong resistance to mechanical impact, and with a large diameter design (conventional size Φ 100-600mm, wall thickness 5-30mm), it can withstand high-pressure environments.

Technical advantages:

Purity ≥ 99.99%, impurity content below 50ppm, ensuring that the material is non polluting.

Surface smoothness Ra ≤ 0.2 μ m reduces medium adhesion and extends service life.

Support customized light transmittance (0% -10%), accurately matching application scenario requirements.

Core application areas

Semiconductor and Photovoltaic Industry

Problem solving: Traditional metal pipes are prone to releasing metal ions in high-temperature environments, which can contaminate wafers or silicon wafers.

Application Scenario:

Isolation tube for reaction chamber in semiconductor epitaxial growth equipment.

Quartz boat carrier tube in photovoltaic cell diffusion process.

Effect: Improve product yield by 3% -5% and reduce equipment maintenance costs.

Chemical and metallurgical industries

Problem solving: Strong corrosive media lead to short service life of metal pipes, and frequent replacement increases the risk of downtime.

Application Scenario:

The conveying pipeline in the pickling equipment.

Electrode protection sleeve for high-temperature molten salt electrolysis cell.

Effect: Extended service life to more than 5 times that of metal pipes, reducing unplanned downtime.

Lighting and Display Technology

Problem solving: Traditional glass tubes have high light transmittance, leading to light pollution or internal component light aging.

Application Scenario:

The shading sleeve of the stage lighting system.

Optical path isolation components in laser equipment.

Effect: Light loss rate ≤ 5%, significantly improving equipment stability.

Scientific research and special experiments

Problem solving: The experimental environment needs to be strictly isolated from external light or thermal radiation interference.

Application Scenario:

Observation window protection tube for high-temperature vacuum furnace.

The shielding sleeve of the nuclear reactor simulation device.

Effect: Achieve 99.9% light blocking to ensure the accuracy of experimental data.

Customized service

Size customization

Scope: Diameter of Φ 50-1000mm, length ≤ 3000mm, wall thickness of 2-50mm.

Accuracy: Diameter tolerance ± 0.5mm, wall thickness tolerance ± 0.2mm.

Performance optimization

Transmittance adjustment: Provide 0% -10% transmittance gradient products according to demand.

Surface treatment: optional polishing, sanding or coating processes to enhance wear resistance or anti reflection performance.

Special design

Alien structure: supports customization of complex shapes such as conical, curved, porous, etc.

Integrated function: Embed temperature sensors or heating wires to achieve intelligent control.

Frequently Asked Questions (FAQ)

What is the maximum operating temperature for large-diameter opaque quartz tubes?

Under continuous operating conditions, this product can withstand temperatures up to 1100°C and can briefly withstand temperatures up to 1250°C, depending on the tube wall thickness and application environment.

Do you offer customization for non-standard dimensions?

Yes, we provide comprehensive customization services with outer diameters ranging from 50 mm to 500 mm, wall thicknesses from 3 mm to 30 mm, and lengths up to 3,000 mm. We can precisely machine these components according to drawings or technical specifications.

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

Opaque quartz tubes contain a micro-bubble structure that effectively scatters light, making them suitable for applications requiring light shielding or uniform heat radiation; transparent quartz tubes, on the other hand, have high light transmittance and are often used in optical systems or as observation windows. While both have similar thermal properties, they are designed for different applications.

How can the thermal shock resistance of large-diameter tubes be ensured in high-temperature furnace tubes or calcination environments?

The thermal shock resistance of opaque quartz tubes depends on the purity of the material and the uniformity of the bubble distribution. The quartz raw material we use has a stable SiO₂ content of 99.5% or higher, with fine, uniformly distributed bubbles that prevent localized stress concentration. The product demonstrates excellent structural integrity in rapid cooling and heating cycle tests, making it suitable for operating conditions with temperature gradients, such as calcining furnace tubes. We recommend that users avoid direct contact between the tube body and alkaline refractory materials during actual furnace installation to extend the service life.

Large diameter opaque quartz tubes have become an ideal choice for high-end industrial fields due to their excellent temperature resistance, corrosion resistance, and light control performance. Through customized services, we assist customers in solving material problems under complex working conditions, promoting technological innovation and industrial upgrading. Contact us immediately for exclusive solutions!

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.