High-Density Thermal Barrier with Superior Infrared Reflection
Milky White Opaque Quartz Tubes (also known as opaque quartz) are high-purity industrial components produced through a specialized fusion process. These tubes create a dense matrix of micro-bubbles, making them the premier choice for high-temperature insulation and infrared heating applications.
Core Performance Advantages
- Optimized Heat Insulation: The uniform micro-bubble distribution significantly lowers thermal conductivity, effectively preventing heat loss and improving energy efficiency in industrial furnaces.
- High Infrared Reflectivity: Provides 70%-80% reflectivity in the 2-4μm wavelength range, precisely reflecting thermal energy back to the target area while protecting surrounding components.
- Exceptional Thermal Shock Resistance: Featuring an extremely low thermal expansion coefficient, these tubes withstand drastic temperature fluctuations without cracking or structural failure.
- Purity and Stability: Maintains SiO2 content ≥ 99.5%, ensuring the material remains resistant to devitrification and deformation at continuous 1100°C workloads.
Technical Specifications
All opaque tubes undergo precision annealing to eliminate internal stress, ensuring durability in extreme thermal cycles.
| Parameter | Specification Range | Tolerance |
| Outer Diameter (OD) | 3.0mm – 500.0mm | ±0.1mm to ±2.0mm |
| Wall Thickness (WT) | 1.0mm – 10.0mm | ±0.05mm to ±0.5mm |
| Standard Length | 1240mm / 2000mm | Precision cutting available |
| Purity (SiO2) | ≥ 99.5% | Trace elements < 50 ppm |
Secondary Fabrication: Services include centerless grinding for surface smoothness, fire-polished ends, precision slotting, drilling, and custom flange integration.
Material Physical Data
- Continuous Working Temp: 1100°C
- Short-term Max Temp: 1350°C
- Softening Point: 1680°C
- Density: 2.0 – 2.1 g/cm³ (Lightweight advantage due to micro-bubble structure)
- Surface Quality: Free of cracks, spalling, or impurities to ensure zero contamination in vacuum environments.
The Science Behind Micro-Bubble Structure and IR Reflectivity
Unlike clear quartz, Milky White Opaque Quartz Tubes are produced using a specialized process that creates a high density of microscopic bubbles (typically 10-50 microns) within the material. This unique structure acts as a superior thermal barrier by scattering and reflecting infrared radiation. Because of this high reflectivity in the near and far-infrared spectrum, Milky White Opaque Quartz Tubes are significantly more efficient than clear quartz for furnace insulation, as they effectively “bounce” heat back into the working zone rather than letting it pass through.
High-Heat Resistance and Dimensional Stability
Operating at continuous temperatures of up to 1100^\circ C, our Milky White Opaque Quartz Tubes maintain excellent structural integrity. The chemical composition, with SiO_2 \geq 99.5\%, ensures minimal impurity leaching even in sensitive semiconductor or vacuum environments. We provide extensive secondary fabrication for these tubes, including centerless grinding for surface smoothness, fire-polished ends for durability, and custom flange integration. This combination of thermal efficiency and mechanical precision makes them the industry standard for heater envelopes and thermocouple protection sleeves.
Typical Industry Applications
- Infrared Heating Technology: Protective envelopes for industrial ovens and IR heating lamps to enhance radiant efficiency.
- Semiconductor Furnaces: Heat shields, insulation plates, and sealing components for diffusion and oxidation processes.
- Aerospace & Engineering: High-temperature thermal barriers for protecting sensitive electronic components from radiant heat.
- Foundry & Smelting: Thermocouple protection sleeves and furnace door sight glass liners.
Rigorous Quality Inspection and Secure Global Packaging
To ensure every Milky White Opaque Quartz Tube meets international industrial standards, we implement a multi-stage quality control protocol. Our engineering team conducts precise dimensional verification, checking outer diameters (OD) and wall thicknesses (WT) against your specific tolerances using digital calipers and ultrasonic gauges. Additionally, each batch undergoes thermal stability testing to verify its performance at temperatures up to 1100^\circ C. For global shipping, we utilize reinforced, custom-built wooden crates and specialized shock-absorbing materials to ensure your fragile quartz components arrive in perfect condition, regardless of the destination.
Ready to Start Milky White Opaque Quartz Tubes Project?
For projects requiring transparency, explore our [Clear Fused Quartz Tubes] or contact us for advice.