Clear fused quartz rods are precision-engineered fused silica rods made from ultra-pure silicon dioxide (SiO₂ ≥99.99%) for applications requiring extreme thermal stability and high optical clarity. These transparent quartz glass rods deliver exceptional performance under high temperatures, corrosive conditions, and rapid temperature cycling, making them ideal for semiconductor processing, optical systems, and laboratory equipment.
Product Overview
Clear fused quartz rods, also known as fused silica rods or quartz glass rods, combine high purity with outstanding thermal and chemical resistance. With a continuous operating temperature up to 1400 °C and a low thermal expansion coefficient of 0.54 × 10⁻⁶ K⁻¹, these rods maintain dimensional stability under rapid heating and cooling cycles. Their wide optical transmission range from 180 nm to 2500 nm covers ultraviolet, visible, and infrared spectra, making them suitable for precision optical instrumentation.
Key Applications
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Semiconductor Manufacturing: Used in wafer carriers, diffusion equipment, and batch processing components due to high purity and contamination resistance.
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Optical & Photonics: Essential for lenses, prisms, fiber optic components, and laser beam delivery systems where precise light transmission is critical.
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Laboratory & Scientific Apparatus: Ideal for high-temperature reactors, crucibles, and heating elements in research environments.
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Industrial Heating Systems: Suitable for furnace fixtures, kilns, and thermal processing equipment requiring temperature resistance up to 1400 °C.
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Fiber Optic Manufacturing: Used as preform rods for drawing telecommunication and specialty optical fibers.
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UV Sterilization & IR Heating: Integral components for UV lamps and IR heating elements due to excellent spectral transmission.
Technical Specifications
The following parameters represent typical values for standard clear fused quartz rods. Custom specifications are available upon request.
| Property | Value |
|---|---|
| Material | Fused Quartz (SiO₂) |
| Purity | ≥99.99% SiO₂ |
| Density | 2.2 g/cm³ |
| Refractive Index | 1.46 |
| Optical Transmission Range | 180–2500 nm |
| Transmission | >90% (200–2500 nm) |
| Melting Point | 1715 °C |
| Continuous Use Temperature | 1100–1400 °C |
| Coefficient of Thermal Expansion | 0.54 × 10⁻⁶ K⁻¹ (20–1000 °C) |
| Thermal Conductivity | 1.46 W·m⁻¹·K⁻¹ (@20 °C) |
| Specific Heat | 670–740 J·K⁻¹·kg⁻¹ (@25 °C) |
| Compressive Strength | 1100 MPa |
| Tensile Strength | 48 MPa |
| Shear Strength | 70 MPa |
| Hardness – Vickers | 1000 kgf·mm⁻² |
| Hardness – Mohs | 5.5–6.5 |
| Dielectric Constant | 3.8 |
| Volume Resistivity | 10¹⁸ Ω·cm (@25 °C) |
| Water Absorption | 0 % |
| Apparent Porosity | 0 % |
Common Dimensions
Clear fused quartz rods are available in various diameters and lengths to suit diverse applications. Standard dimensional tolerances are maintained within ±0.1 mm to ±0.15 mm for diameter and straightness.
| Diameter | Length Options | Typical Application |
|---|---|---|
| 2–10 mm | 50–500 mm | Precision optics, fiber preforms, sensor components |
| 11–30 mm | 100–1000 mm | Laser systems, chemical reactors, UV curing chambers |
| >30 mm | 500–2000 mm | Industrial furnaces, high-power lighting, structural elements |
Custom diameters and lengths are available upon request.
Quality Assurance
Our fused quartz rods are manufactured in accordance with international quality standards. Manufacturing processes adhere to ISO 9001 quality management requirements, ensuring consistent product performance and traceability.
Material Conformity
Standard clear fused quartz rods comply with applicable industry standards for high-purity silica materials, including thermal and mechanical property benchmarks. Certificates of analysis are available with each shipment, documenting purity levels and key performance parameters.
Testing Data
Batch testing confirms the following typical performance ranges:
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Purity: SiO₂ ≥99.99% verified by spectral analysis
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OH Content: Controlled for low hydroxyl levels to ensure optical clarity
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Transmission: >90% across 200–2500 nm spectral range
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Dimensional Tolerance: ±0.1 mm to ±0.15 mm for diameter and straightness
Why Choose Clear Fused Quartz Rods
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Exceptional Thermal Shock Resistance – Withstands rapid temperature changes without cracking due to an ultra-low thermal expansion coefficient.
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Broad Optical Transmission – Maintains high transmittance across UV, visible, and IR spectra (180–2500 nm).
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High Purity – SiO₂ content ≥99.99% minimizes contamination in sensitive semiconductor and optical applications.
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Chemical Inertness – Resistant to most acids, alkalis, and corrosive environments, with zero water absorption and zero apparent porosity.
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Dimensional Stability – Maintains precise geometry under high-temperature operation, essential for precision alignment and support applications.
Customization Options
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Diameters from 2 mm to 50 mm and larger
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Custom lengths and cut tolerances
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Surface finishes: polished, ground, or as-requested
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Special shapes: grooved, tapered, cone-end, or custom-machined per drawing
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Precision machining tolerances down to ±0.05 mm for custom geometries