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Explore our advanced fused quartz and silica products precision-machined for optical sight glasses, spectral digestion, semiconductor wafer processing, and laboratory analysis.
Delivering exceptional performance across Deep Ultraviolet (DUV), Visible, and Near-Infrared (NIR) spectral wavelengths under rigorous industrial stress.
High-purity fused quartz glass tubes exhibit superior transmission efficiency (>92% across visible spectra) with minimal absorption bands. In optical windows and laser cavities, this eliminates chromatic distortion and beam attenuation, critical for spectroscopic accuracy and UV curing instruments.
With an ultra-low coefficient of thermal expansion (CTE of 5.5 × 10-7/°C), fused silica tubes withstand rapid thermal shocks up to 1200°C without mechanical fracture, optical distortion, or refractive index drift in high-temperature analytical viewports and pyrometry assemblies.
Synthesized with SiO2 content exceeding 99.995%, our tubing eliminates trace metal contamination (Fe, Cu, Ti, Al < 1 ppm). This absolute chemical inertness resists aggressive plasma etching, corrosive acids, and high-pressure reactive atmospheres in semiconductor and chemical metrology.
| Physical / Optical Property | High Purity Fused Quartz (Natural) | Synthetic Fused Silica (Optical Grade) | Impact on Precision Instruments |
|---|---|---|---|
| Optical Transmission Range | 220 nm – 3500 nm (UV to NIR) | 185 nm – 2500 nm (Deep UV) | Zero signal degradation in spectrophotometers and laser windows |
| Thermal Expansion (0-300°C) | 5.5 × 10-7 K-1 | 5.2 × 10-7 K-1 | Prevents focal length shift and thermal lensing under high power |
| Softening / Annealing Point | 1680°C / 1215°C | 1600°C / 1180°C | Maintains dimensional stability in high-temperature furnace tubes |
| Refractive Index (nd @ 589.3 nm) | 1.4585 | 1.4584 | Consistent wavefront integrity and minimal beam divergence |
| Dielectric Strength (20°C, 1MHz) | 25 – 40 kV/mm | 30 – 50 kV/mm | Superior electrical insulation for plasma and RF chambers |
As photonics, quantum computing, and sub-nanometer semiconductor manufacturing accelerate globally, the demand for high-precision quartz glass tubes and optical sight windows has seen unprecedented growth. Precision analytical instruments, such as Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Fourier-Transform Infrared (FTIR) spectrometers, and deep-UV laser inspection tools, require structural optics that eliminate background noise and signal scattering.
Industrial development is steering rapidly towards tighter dimensional concentricity, sub-micron surface roughness (Ra < 0.5 nm), and vacuum-tight sealing capabilities. Modern instruments operating under extreme pressure, cryogenic temperatures, or aggressive plasma environments rely on specialized quartz glass tubes that combine high mechanical tensile strength with optical crystal clarity.
1. Optical Spectrophotometer Flow Cells & Cuvettes: Quartz glass tubes serve as precision continuous flow channels for liquid chromatography and UV-Vis photometric detectors, allowing non-destructive, real-time chemical quantification without spectral interference.
2. High-Power Laser Cavities & Flashlamp Sleeves: In solid-state and Nd:YAG laser systems, quartz tubes act as coolant jackets and flashlamp envelopes, filtering unwanted UV radiation while maximizing optical pump efficiency.
3. Vacuum Pyrometry Viewports & Furnace Windows: Serving as transparent pressure-isolation barriers in industrial furnaces, high-purity quartz optical windows enable precise infrared thermal imaging up to 1200°C without losing atmospheric integrity.
4. Semiconductor Metrology Chambers: Used in wafer defect inspection and ellipsometry setups, precision quartz tubes provide optical access while resisting fluorine and chlorine etching chemistries.
National Silicon Valley Manufacturing Base • Integrated R&D • End-to-End Quality Verification
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province—a world-renowned national base for silicon material industry. As a professional manufacturer integrating R&D, design, production, sales and import & export trade, the company relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier of quartz consumables for photovoltaic, semiconductor, laboratory, chemical, lighting and optical precision instrumentation industries.
The company features standardized production workshops, advanced quartz processing equipment, and a professional R&D team with full-process production capacity from quartz raw material purification to finished product manufacturing. All products are made of high-purity fused quartz raw materials, featuring excellent high-temperature resistance (up to 1200°C), thermal shock resistance, corrosion resistance, high light transmittance, and exceptional electrical insulation performance.
From raw ingot plasma synthesis and continuous thermal tube drawing to precision CNC optical polishing, flame annealing, and cleanroom vacuum testing.
Modern workshops equipped with automated glass lathes, vacuum sintering furnaces, and advanced dimensional measurement systems.
A professional manufacturer with over 10 years of experience in custom quartz engineering and high-purity glass fabrication.
Diffusion furnace tubes, wafer carriers, plasma etch chambers, and DUV lithography optical components.
Solar cell diffusion tubes, quartz boats, LPCVD reactor tubes, and thermal processing consumables.
High-transmittance optical windows, laser flow tubes, cuvettes, sight glasses, and pyrometer viewports.
High-purity digestion vessels, distillers, tri-acid purification systems, and corrosion-proof laboratory instruments.
Engineering guidelines for selecting the optimal quartz glass tube for optical instruments and extreme working environments.
Natural fused quartz is manufactured by melting high-purity natural quartz crystal sand, offering exceptional thermal stability up to 1200°C and broad optical transmission from 220nm to 3500nm. Synthetic fused silica is produced via chemical vapor deposition of SiCl4, providing superior deep UV transmission down to 185nm, virtually zero bubble inclusions, and higher laser damage threshold.
Due to fused quartz's extremely low thermal expansion coefficient (5.5 × 10-7/°C) and highly uniform refractive index, thermal gradients induced by high-power laser pumping do not cause significant curvature change or localized refractive shifts, thereby preserving beam wavefront quality.
We support outer diameters (OD) from 1 mm up to 600 mm, wall thickness tolerances down to ±0.05 mm, and surface optical polishing up to 20/10 Scratch-Dig with surface roughness Ra < 0.5 nm. Custom flanging, grinding, threading, and optical coating are fully supported.
All precision optical glass assemblies and welded quartz tubes undergo rigorous helium mass spectrometry leak testing (leak rate < 1 × 10-9 mbar·L/s), ensuring structural integrity under high vacuum and ultra-high purity atmosphere conditions.
Explore our full line of premium fused quartz tubes, ingots, plates, bell jars, and specialized precision instruments manufactured to international standards.
