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Half-Round Fused Quartz Rod for Optical and Thermal Applications -TOQUARTZ®
Features of Half-Round Quartz Rod
These half-round quartz rods maintain all the superior characteristics of cylindrical quartz while offering unique functional advantages through their semi-circular profile.
Physical Properties
- High Strength: Fracture modulus up to 350MPa+
- Excellent Wear Resistance: Low friction coefficient for extended lifespan in high-flow applications
- Thermal Conductivity: 120-160 W/m·K for efficient heat transfer
Optical Properties
- Excellent Light Transmission: Wavelength range from 120nm to 4500nm with no absorption peaks
- UV Transparency: Ideal for ultraviolet applications requiring high transmission
- Surface Options: Available in polished, ground, or as-cut finishes for various optical requirements
- Temperature Resistant 1100℃+
- Wide Spectral Range 120-4500nm
- Material Purity: 99% - 99.98% SiO₂
Thermal Properties
- High Temperature Stability: Softening point approximately 1730°C
- Working Temperature: Long-term use at 1100°C, short-term use up to 1450°C
- Thermal Shock Resistance: Exceptional resistance to rapid temperature changes
Chemical Properties
- Superior Corrosion Resistance: Stable against acids, bases, molten salts, and fluorinated gases
- Material Purity: 99% to 99.98% SiO₂ content
- Low Thermal Expansion: Coefficient of 5.5×10⁻⁷/°C for dimensional stability
Technical Specifications & Dimensions of Half-Round Fused Quartz Rods
Technical Specifications of Half-Round Fused Quartz Rods
Physical Properties
| Parameter | Value / Range | Notes |
| Diameter Range | 5mm – 150mm | Customizable, tolerance ±0.1mm |
| Length Range | 50mm – 1400mm | Customizable, tolerance ±0.5mm |
| Half-Round Cut Tolerance | ±0.2mm | Precision-controlled semi-cylindrical cut |
| Density | 2.2 g/cm³ | Typical for fused silica |
| Fracture Modulus | ≥ 350 MPa | High mechanical strength |
| Thermal Conductivity | 120 – 160 W/m·K | High heat transfer efficiency |
| Softening Point | ~1730°C | Material transition temperature |
| Working Temperature (Long-term) | 1100°C | Stable for continuous use |
| Working Temperature (Short-term) | 1450°C | For peak thermal loads |
| Thermal Expansion Coefficient | 5.5 × 10⁻⁷ /°C | Low expansion, high dimensional stability |
Chemical Properties
| Parameter | Value / Range | Notes |
| SiO₂ Purity | 99% – 99.98% | High-purity fused quartz |
| Acid Resistance | Excellent (except HF) | Stable in most acidic environments |
| Alkali Resistance | Good (limited at high temp) | Avoid prolonged exposure to strong bases at high temp |
| Halogen Resistance | Excellent | Suitable for fluorinated gas environments |
Optical Properties
| Parameter | Value / Range | Notes |
| UV Transmission (200nm) | ≥ 85% | High UV transparency |
| Visible Light Transmission (400–700nm) | ≥ 92% | Clear fused quartz |
| IR Transmission (2.5–4.5μm) | ≥ 80% | Suitable for IR heating and sensing |
| Refractive Index (at 589nm) | ~1.458 | Stable optical performance |
| Surface Finish Options | Polished / Ground / As-cut | Based on application requirements |
Size of of Half-Round Fused Silica Rods
| Model | Diameter (mm) | Length (mm) | Material Purity |
| AT-QTZ-G037 | 5 | 50-1400 | 99%-99.98% |
| AT-QTZ-G038 | 10 | 50-1400 | 99%-99.98% |
| AT-QTZ-G039 | 15 | 50-1400 | 99%-99.98% |
| AT-QTZ-G040 | 18 | 50-1400 | 99%-99.98% |
| AT-QTZ-G041 | 20 | 50-1400 | 99%-99.98% |
| AT-QTZ-G042 | 24 | 50-1400 | 99%-99.98% |
| AT-QTZ-G043 | 28 | 50-1400 | 99%-99.98% |
| AT-QTZ-G044 | 30 | 50-1400 | 99%-99.98% |
| AT-QTZ-G045 | 5-150 | 50-1400 | 99%-99.98% |
TOQUARTZ® Solving Challenges with Half-Round Quartz Rods
in Advanced Applications
Half-Round Quartz Rods for Precision Optical Systems
Key Advantages
- Flat-Mount Optical Stability Flat side enables ±0.05mm alignment accuracy in beam collimation systems.
- Controlled Beam Shaping Curved surface maintains Gaussian beam profile with <2% distortion in 532nm laser systems.
- UV-IR Optical Clarity Transmission ≥92% in 400–700nm and ≥85% at 200nm ensures minimal signal loss in spectrometers.
TOQUARTZ® solution
A German laser optics integrator required beam-shaping rods with <±0.1mm flatness deviation for a 532nm laser collimation module. Previous suppliers delivered rods with inconsistent curvature, causing 7% beam divergence.
TOQUARTZ provided half-round quartz rods with verified curvature radius tolerance of ±0.05mm, reducing beam divergence to <1.5% and improving system alignment yield by 18%.
Half-Round Fused Quartz Rods for Industrial Heating Systems
Key Advantages
- Enhanced Thermal Contact Surface Flat side increases contact area by 40% vs. cylindrical rods, improving heat transfer efficiency.
- Directional IR Reflection Curved surface reflects >80% IR energy at 2.5–4.5μm, optimizing thermal field uniformity.
- Thermal Shock Resistance Withstands 200°C/min ramp rate without cracking in furnace environments.
TOQUARTZ® solution
A US IR heater OEM faced uneven heat distribution in a compact furnace chamber using cylindrical reflectors.
TOQUARTZ supplied half-round quartz rods with verified IR reflectivity and flat-side thermal contact optimization. Post-installation, thermal uniformity improved by 23%, and heater calibration time was reduced by 30%, enhancing production throughput.
Half-Round Fused Silica Rods for Medical and Laboratory Equipment
Key Advantages
- UV-C Sterilization Efficiency ≥85% transmission at 254nm enables effective microbial inactivation in UV systems.
- Biocompatible Mounting Interface Flat side allows secure, sterile mounting in Class 100 cleanroom environments.
- Spectral Purity for Analysis No absorption peaks from 200nm–2500nm ensures accurate spectrophotometric readings.
TOQUARTZ® solution
A Japanese medical device company developing a UV-C sterilization chamber required quartz rods with ≥85% UV-C transmission and biocompatible surfaces.
TOQUARTZ delivered half-round rods with certified UV-C performance and cleanroom-packaged flat surfaces. The device passed ISO 13485 validation, and sterilization efficacy improved by 17% compared to previous borosilicate components.
TOQUARTZ® Customization Options for Half-Round Fused Silica Rods
Custom Dimensions
TOQUARTZ provides flexible dimensional customization to meet the specific requirements of optical and thermal system integration:
- Diameter customization from 5mm to 150mm
- Length customization from 50mm to 1400mm
- Flatness tolerance of the cut surface up to ±0.2mm for precise optical alignment
- Custom curvature radius available for beam shaping or IR reflection optimization
- Segment length and arc angle customization for partial half-round geometries
- Support for asymmetric half-round profiles upon request
- Engineering assistance for dimension optimization based on application scenarios
Surface Treatments
We provide application-specific surface finishes for Half-Round Fused Quartz Rods, including:
- Optical polish (Ra < 0.01μm) for laser-grade clarity
- Ground matte finish for diffuse IR reflection
- Fire-polished edges for safe handling in medical devices
- Dual-finish (flat side ground, curved side polished) for hybrid applications
Technical Modifications
TOQUARTZ supports advanced modifications such as:
- End-face beveling (15°–45°) for optical coupling
- Slotting or notching for mechanical integration
- Drilled holes (Ø1–5mm) for sensor mounting
· Our in-house engineers provide drawing assistance and feasibility review within 24 hours
· We offer rapid prototyping and short lead times (as fast as 7 days for custom rods)
· All custom half-round fused quartz rods undergo 100% dimensional and visual inspection before shipment
This level of flexibility and responsiveness is rarely available from large-scale quartz manufacturers. TOQUARTZ is built to serve B2B clients who need precision, speed, and technical support—not just standard catalog parts.
Usage Guide of Half-Round Fused Quartz Rod
Handling and Storage
- Clean Gloves: Always handle with powder-free gloves to prevent contamination and fingerprints
- Storage: Store in original packaging or on clean, soft surfaces to prevent scratches and contamination
- Avoid Impact: Quartz is hard but can chip or crack when subjected to impact or point pressure
- Environment: Store in dry, clean environment away from chemicals that might etch the surface
Cleaning and Maintenance
- Standard Cleaning: Use acetone, methanol or isopropyl alcohol on a lint-free cloth for regular cleaning
- Deep Cleaning: For stubborn contaminants, soak in piranha solution (H₂SO₄:H₂O₂) with proper safety precautions
- Inspection: Regularly inspect for micro-cracks or surface damage before high-temperature applications
- Repolishing: For optical applications, surface can be repolished if minor scratches develop
Need precision-engineered
half-round quartz rods for your optical or thermal system?
Contact TOQUARTZ now for expert consultation. We deliver precision and speed.
Why Partner with TOQUARTZ
Direct Factory Advantage
As a direct manufacturer, we can cut out the numerous intermediate links.
Engineering Expertise
Technical team guides clients from material selection to design optimization, translating specs into deliverables.
Flexible Manufacturing
Handling standard & custom orders via small-batch expertise and prototyping rigor to meet urgent deadlines.
Quality
Assurance
Pre-shipment 3-step validation:
1. dimensional accuracy,
2. material purity ,
3. performance thresholds
Global Supply Chain
Reliable global logistics to industrial hubs (DE/US/JP/KR priority) with trackable milestones.
Releted Products
As a specialized manufacturer with direct factory capabilities, TOQUARTZ provides both standard and custom quartz solutions with engineering support throughout the specification and implementation process.
FAQ
Q: What are half-round quartz rods used for?
A: Half-round fused quartz rods are primarily used in optical systems (beam shaping, light guides), thermal applications (IR reflectors, heating elements), medical equipment (UV sterilization), laboratory instruments, and specialized industrial equipment where the flat side provides mounting stability while the curved side maintains optical or thermal functionality.
Q: What is the light transmission range of transparent quartz half-round rods?
A: Clear fused quartz half-round rods offer excellent light transmission across a wide spectrum from 120nm (deep UV) to 4500nm (mid-infrared). This makes them ideal for applications requiring UV transparency, visible light transmission, or infrared applications. The material has no absorption peaks within this range, providing consistent optical performance.
Q: How do half-round quartz rods perform in high-temperature environments?
A: Half-round fused quartz rods exhibit excellent performance in high-temperature environments due to their low thermal expansion coefficient (5.5×10⁻⁷/°C), high thermal stability, and resistance to thermal shock. They maintain dimensional stability and do not deform at temperatures up to 1100°C for continuous operation. Their thermal conductivity of 120-160 W/m·K also makes them efficient for heat transfer applications in controlled heating systems.
Q: How do I clean and maintain half-round quartz rods?
A: For general cleaning, use acetone, methanol, or isopropyl alcohol with a lint-free cloth. For optical applications, follow standard optical cleaning protocols. Avoid alkaline solutions at high temperatures as they can etch the surface. For stubborn contaminants, specialized cleaning solutions like piranha solution can be used with proper safety precautions. Regular inspection for microcracks is recommended for high-temperature applications.
Q: How do half-round quartz rods compare to other materials like borosilicate glass or ceramics?
A: Compared to borosilicate glass, fused quartz half-round rods offer superior temperature resistance (1100°C vs 500°C), better UV transmission, lower thermal expansion, and higher purity. Versus ceramics, quartz provides transparency, precise optical properties, and lower thermal expansion, though some ceramics offer higher mechanical strength. Fused quartz is preferred when optical clarity, thermal stability, and chemical resistance are priorities, particularly in optical systems and high-temperature applications.
Contact our engineering team for technical consultation and pricing. We’ll help you select the optimal specifications for your application requirements.