Quartz Capillary Tubes Large Diameter/Small Inner Diameter 99.999% Pure SiO₂
Quartz capillary tubes are precision-engineered microtubes manufactured from high-purity fused silica (silicon dioxide, SiO₂) using advanced tube-drawing technology. They are available in both large-diameter (outer diameter ≥1 mm) and small-diameter (inner diameter as low as 1 μm) specifications. Core advantages include: Extreme Temperature Resistance: Short-term tolerance up to 400°C, long-term stability at 300–360°C; Chemical Inertness: Resists strong acids (except HF), alkalis, and organic solvents, ideal for corrosive environments; Optical Transparency: Full UV-to-IR transmission (185–3500 nm), suitable for spectroscopic analysis; Mechanical Performance: Tensile strength >600 kpsi, combining rigidity with flexibility (wrappable). ZMSH specializes in customized production, offering end-to-end services from design and fabrication to testing. Applications span gas chromatography, microfluidic chips, and medical devices, with support for custom drawings, small-batch rapid delivery.
Specification for Quartz Capillaries
| Parameter |
Large-Bore Capillary |
Small-Bore Capillary |
| Outer Diameter Range |
1.0mm~20.0mm |
0.1mm~1.0mm |
| Wall Thickness Tolerance |
±0.05mm |
±0.01mm |
| ID/OD Ratio |
0.2~0.9 (Customizable) |
0.1~0.8 (Customizable) |
| Length |
≤1000mm (Standard) |
≤500mm (Standard) |
| Roundness Error |
≤1% |
≤2% |
| Surface Roughness |
Ra≤0.8nm (Polished) |
Ra≤1.2nm (Polished) |
| Thermal Expansion Coefficient |
0.55×10⁻⁶/°C |
0.55×10⁻⁶/°C |
| Max Operating Temperature |
1100℃ (Short-term) |
1000℃ (Short-term) |
| Transmission Range |
170nm~2500nm |
170nm~2500nm |
| Pressure Resistance |
>30MPa (Wall≥0.5mm) |
>10MPa (Wall≥0.1mm) |
Key Features of Quartz Capillaries
1. Chemical Stability
· Broad pH resistance (1–14), superior HF corrosion resistance compared to metals and ceramics.
· Surface inertness minimizes sample adsorption, critical for trace analysis.
2. Thermal Stability
· Ultra-low thermal expansion coefficient (5.5×10⁻⁷/°C), withstands thermal shock (-200–1100°C).
· No softening or deformation at high temperatures, compatible with CVD and laser processing.
3. Mechanical Performance
· Tensile Strength: >600 kpsi (Optube series);
· Flexibility: Polyimide coating enables bending radius down to millimeter scale.
4. Optical Performance
· UV: ≥90% transmission at 185 nm; Visible: ≥95%; IR: ≥85% at 3500 nm.
· Low light scattering for high-precision optical sensing and imaging.
5. Dimensional Diversity
· Small Diameter: Inner diameter 1–2500 μm, wall thickness 10–1000 μm, ±0.5% tolerance;
· Large Diameter: Outer diameter up to 3500 μm, length 5000 m, supports gradient wall thickness customization.
6. Surface Treatments
· Polyimide coating (400°C), metal plating (gold/nickel), hydrophobic/hydrophilic modifications.
Primary applications of Quartz Capillaries
1. Analytical Instruments
- Gas Chromatography (GC): Column carriers for separating complex organics (e.g., hydrocarbons, pollutants);
- Capillary Electrophoresis (CE): High-resolution separation of biomolecules (DNA, proteins).
2. Microfluidics
- Microreactors and cell-sorting chips for microliter-scale fluid control (drug delivery, single-cell analysis).
3. Medical Devices
- Minimally Invasive Surgery: Endoscopic catheters for real-time imaging and tissue sampling;
- In Vitro Diagnostics (IVD): Liquid biopsy chips for high-sensitivity biomarker detection.
4. Industrial Manufacturing
- Laser Processing: Optical windows for fiber lasers, high-power laser transmission;
- Semiconductors: High-temperature observation windows in wafer etching equipment.
5. Research & Development
- Nanofluidics: Sub-1 μm inner diameter for single-molecule detection;
- Optical Sensing: Evanescent wave-based chemical/biological sensors.
ZMSH's Services
ZMSH focuses on deep customization of quartz capillary tubes, offering full-chain services from raw material selection to final product delivery. Clients can specify parameters including:
Inner diameter (minimum 1 μm), outer diameter (maximum 3500 μm), length (up to 5000 m);
Special functions: Gradient refractive index, laser damage-resistant coatings;
Non-standard shapes (spiral, bifurcated) and hybrid materials (quartz-metal composites).
Capabilities:
Precision tube drawing and CNC machining for ±0.03 mm dimensional control;
Comprehensive testing reports (transmission, thermal expansion) and application optimization;
Support for prototypes and mass production, serving semiconductor equipment manufacturers, optical communication firms, and research institutions.
Related product recommendations: Quartz rods
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