Transparent cylindrical capillary quartz rods are precision-drawn tubes made from high-purity fused silica (SiO₂ ≥ 99.99%), featuring a uniform circular cross-section, micron-level wall thickness, and high optical clarity from UV (down to ~190 nm) through infrared. Their extremely low thermal expansion coefficient (≈5.5 × 10⁻⁷/°C) gives them strong thermal-shock resistance, with typical long-term use around 1100 °C and short-term peaks near 1300 °C, while remaining chemically inert to most acids except hydrofluoric acid.

Core features:

High transmittance: The transmittance exceeds 90% in the ultraviolet to infrared wavelength range (200-3500nm), approaching the theoretical limit and meeting the requirements of precision optics.

High temperature resistance: It can withstand high temperatures of 1100 ℃ for a long time and above 1500 ℃ for a short period of time, suitable for extreme hot environments.

Chemical stability: resistant to acid and alkali corrosion, resistant to hydrolysis, and maintains stable performance in harsh chemical environments.

Low thermal expansion coefficient: The thermal expansion coefficient is only 5.5 × 10 ⁻⁷/℃, reducing the risk of deformation caused by temperature changes.

High mechanical strength: With a Mohs hardness of 7 and high bending strength, it can be processed into slender structures without easily breaking.

The product has passed ISO 9001 quality system certification, with a surface finish of up to 10/5 (Scratches/Dig standard) and a diameter tolerance controlled within ± 0.01mm, meeting the stringent requirements for material purity (total impurity content<50ppm) in high-end fields such as semiconductors and lasers.

Core application scenarios

Semiconductor manufacturing

Problem solving: In wafer processing, traditional quartz materials are prone to processing errors due to high temperature deformation, while transparent cylindrical quartz rods, with their high temperature resistance and low thermal expansion characteristics, can stably support wafers, ensuring nanometer level accuracy in photolithography, etching, and other processes.

Typical applications: As an optical window for lithography exposure systems and a transparent observation window for etching reaction chambers.

Laser and Optical Systems

Problem solving: In high-power lasers, ordinary materials are prone to energy loss or cracking due to thermal absorption. This product achieves a laser transmittance of over 99.5% through high transparency and thermal stability, reducing system thermal load.

Typical applications: resonant cavity mirror substrate for solid-state lasers, transparent conduit for fiber couplers.

Chemical and environmental protection fields

Problem solving: In strong acid and alkali environments, metal or ordinary glass containers are prone to corrosion. Quartz rods, due to their chemical inertness, can be used as windows or stirring shafts for reaction vessels to achieve safety monitoring and operation.

Typical applications: Observation windows for semiconductor wet cleaning equipment, transparent shafts for high-purity reagent stirring systems.

Research and medical equipment

Problem solving: In spectral analysis, material impurities can interfere with the detection signal. The ultra-low impurity content of this product can avoid background noise and improve data accuracy.

Typical applications: Sample cell of Raman spectrometer, transparent conduit of medical endoscope.

Customized service plan

Customization of dimensions and tolerances

Diameter range: 0.5mm-300mm, supporting micrometer level precision machining.

Length range: 1mm-3000mm, can be cut according to requirements.

Tolerance level: Three options are available: standard level (± 0.05mm), precision level (± 0.01mm), and ultra precision level (± 0.005mm).

Surface treatment process

Polishing grade: Single/double-sided polishing to 40/20 (Scratches/Dig) or higher standards.

Coating service: Optional anti reflective film (AR), high reflectivity film (HR), spectral film, etc., covering the 190nm-5000nm wavelength range.

Special treatment: Provides additional functions such as anti-static coating and scratch resistant reinforcement.

Customization of Shape and Structure

Alien processing: supports complex structures such as step shafts, cones, and hollow tubes, with a minimum inner diameter of up to 0.3mm.

Aperture design: Customizable through holes, blind holes, or threaded holes to meet fluid transmission or mechanical fixation requirements.

FAQ — Transparent Cylindrical Capillary Quartz Rods

What material are your capillary quartz rods made of?

They are made from high-purity SiO₂ (≥99.99% purity, low OH or high OH content on request), not borosilicate or soda-lime glass. This ensures superior purity and contamination-free performance.

What size ranges can you customize?

Outer diameter from 0.2 mm to 50 mm, wall thickness from 0.05 mm upward, and cut lengths from a few millimeters to several meters. Tolerance can be held to ±0.02 mm on request.

What is the maximum service temperature?

Continuous use up to approximately 1100 °C, with short-term peaks near 1400 °C, depending on wall thickness and thermal load.

Can the rods be processed further?

Yes. We offer cutting, grinding, fire polishing, drilling, bending, flaring, sealing, and thread or taper finishing per your drawing.

Do you provide certificates and samples?

Each batch can ship with a material and dimensional certificate. Samples are available before mass production, and OEM/ODM branding is supported.

What is the typical lead time and MOQ?

Standard samples ship in 3–7 days; customized batches typically require 2–4 weeks. Low MOQ is accepted for prototyping.

If you are looking for a core material that can withstand harsh environments such as high temperature, corrosion, high pressure, and requires excellent optical performance, our transparent cylindrical quartz rod will be your ideal choice. Welcome to contact us.

Luverre Quartz 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. We can meet all kinds of customized requirements for quartz glass products.