The opaque high-purity quartz tube is made of selected high-purity natural quartz sand, which is prepared through high-temperature melting and unique processes. Its prominent feature is a milky white and opaque appearance, which is due to the large number of tiny bubbles densely distributed inside the material. These bubbles can efficiently scatter light, thereby achieving excellent shading and diffuse reflection effects.

Despite its opaque appearance, its essence is still high-purity quartz material, inheriting a series of excellent physical and chemical properties of quartz glass. We offer an extremely wide diameter range from slender 2mm to robust 600mm to meet the demanding requirements of various industrial scenarios.

Core features and solved problems:

Extreme shading and uniform diffuse reflection: effectively solves the problems of uneven heating of materials, photodegradation or deterioration of active ingredients caused by direct light during high temperature processes, and protects sensitive materials.

Excellent thermal stability: extremely low coefficient of thermal expansion, able to withstand long-term use temperatures of 1200 ℃ and higher short-term thermal shocks. Thoroughly solved the risk of material explosion and rupture caused by rapid temperature changes, ensuring production safety and continuity.

High purity corrosion resistance: The SiO2 content is over 99.9%, and there are almost no metal impurities. It has strong corrosion resistance to most acidic and acidic gases (except hydrofluoric acid and hot phosphoric acid), solving the problems of container contamination, erosion, and short service life in corrosive environments, ensuring the purity of the process environment.

Excellent electrical insulation: With high resistance and low dielectric loss, it is an ideal insulation material in high-temperature environments, solving the insulation and protection problems under high-temperature electric fields.

Main application areas

This product, with its unique performance, is widely used in the following high-tech and traditional industrial fields:

Semiconductor industry:

Application: Used as a carrier tube (boat tube) or furnace tube itself for wafers in processes such as diffusion, oxidation, CVD (chemical vapor deposition), etc.

Problem solving: Its opaque nature prevents the heating element from directly shining on the chip, ensuring even heating; High purity avoids contaminating silicon wafers during high-temperature processes.

Photovoltaic industry:

Application: Key component of polycrystalline silicon ingot furnace - crucible guard plate (insulation cage).

Problem solving: Provide a uniform insulation and diffuse reflection environment, control the temperature gradient during the melting and crystallization process of silicon materials, which directly affects the quality and efficiency of polycrystalline silicon ingots.

Industrial heating field:

Application: Shell sheath for infrared heating tubes and tungsten halogen heating tubes.

Solution: Convert the strong visible light emitted by the filament into soft and uniform infrared radiation, improve heating efficiency, and also protect, insulate, and prevent filament oxidation.

Chemical and Environmental Protection Industry:

Application: High temperature corrosive gas transmission pipelines, observation windows, combustion tubes, acid distillation process containers.

Problem solving: Resistant to high-temperature corrosive media, extending equipment life, ensuring process safety, and achieving visual management.

Optoelectronics and Lighting:

Application: LED packaging bracket, diffuse reflection cover for special lighting fixtures.

Problem solving: Provide uniform light output effect, eliminate glare, and protect human eyes.

Our customized services

We are well aware that standard products cannot meet the unique needs of all customers. Therefore, we provide highly flexible professional customization services to tailor solutions for you.

Size customization:

Diameter: We can produce any non-standard diameter pipe within the range of 2mm to 600mm.

Length: Specific lengths can be customized according to your equipment requirements to reduce on-site processing steps.

Wall thickness: Provides multiple wall thickness options to meet the needs of different pressures, strengths, and costs.

End treatment and processing:

We provide precise cutting, grinding, chamfering, flame polishing and other services to ensure smooth and edge free ends for easy installation and sealing.

Can undertake complex secondary processing such as drilling, slotting, sintering sealing, bending (limited angle and diameter), etc.

Purity and performance adjustment:

According to specific process requirements, the purity level and bubble density of quartz tubes can be discussed and adjusted to achieve the best balance between light shielding, strength, and thermal stability.

Frequently Asked Questions

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

Opaque quartz tubes contain tiny air bubbles or light-blocking additives that effectively block ultraviolet and visible light, making them suitable for applications requiring protection from light or reduced heat radiation; transparent quartz tubes, on the other hand, have high light transmittance and are commonly used in optical windows or lighting applications.

What is the maximum operating temperature that opaque quartz tubes can withstand?

Under normal atmospheric conditions, our opaque quartz tubes can operate continuously at 1100°C and withstand short-term temperatures of up to 1250°C, depending on the tube wall thickness and operating environment.

Do you offer customization for non-standard sizes or special shapes?

Yes, we provide a full range of customization services for diameters from 2 mm to 600 mm and lengths up to 3,000 mm. We can also fabricate special structures such as flanges, tapered sections, and bends according to your drawings.

Does your diameter range truly cover 2 mm to 600 mm?

Yes. We offer a full range of opaque quartz tubes, from 2 mm capillary-grade tubes to 600 mm large-diameter tubes. Small-diameter tubes are suitable for applications such as precision sensor protection and thermocouple insulation sleeves; large-diameter tubes are designed for industrial applications such as semiconductor diffusion furnace tubes and large electric heating radiation tubes. According to publicly available industry data, the outer diameter specifications for opaque quartz glass tubes range from 200 mm, 300 mm, 400 mm, and 500 mm up to 600 mm; our product line extends this range further to the small-diameter end of 2 mm. All sizes can be custom-machined according to customer drawings.

The opaque high-purity quartz tube with a diameter of 2-600mm has become a core material in semiconductor, photovoltaic, chemical, scientific research and other fields due to its excellent high temperature resistance, chemical inertness and high-purity characteristics. Through customized services, we can further meet the needs of special scenarios, from micro experimental tubes to large industrial equipment, from standard sizes to irregular structures, empowering industrial upgrading in all aspects. Choosing an opaque high-purity quartz tube means choosing a stable, efficient, and safe future.

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.