Tube Furnace
Three Zone Alumina Tube Furnace with Vacuum Flanges High Temperature 1700C Thermal Gradient CVD System
Item Number: TU-79
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Product Overview
This high-performance three-zone tube furnace represents a pinnacle in laboratory thermal processing, designed specifically for researchers and industrial engineers requiring precise control over complex temperature profiles. By integrating three independent heating zones within a single high-purity alumina tube environment, this system enables the creation of sophisticated thermal gradients essential for crystalline growth, chemical vapor deposition (CVD), and advanced material synthesis. The core value of the equipment lies in its ability to maintain disparate temperatures across a continuous workspace, providing a versatile platform for both standard heat treatments and highly specialized research protocols.
Primary use cases for this unit span across electronics, aerospace, and energy research, where functional materials must be prepared under strict atmospheric conditions. The three-zone architecture is particularly effective for epitaxial film growth and the synthesis of nanowires, where the precursor evaporation and substrate deposition must occur at different, precisely maintained temperatures. Target industries include semiconductor manufacturing, advanced ceramics development, and metallurgical research facilities that demand uncompromising accuracy and repeatability in their thermal cycles.
Engineered for demanding industrial and laboratory environments, the system features a robust double-layer steel housing and advanced air cooling to ensure a safe, low-temperature outer shell even during prolonged high-temperature operations. Reliability is built into every component, from the high-purity fibrous alumina insulation to the dual-element heating configuration that balances the technical requirements of extreme heat in the center with controlled stability on the periphery. This equipment delivers the consistency required for long-duration experiments, providing users with the confidence that their critical data and material outcomes are protected by superior thermal engineering.
Key Features
- Tri-Zone Independent Temperature Control: The system utilizes three separate digital microprocessors to manage each zone independently, allowing for the creation of precise thermal gradients. This capability is critical for processes where precursors must be vaporized in one zone and deposited in another at a different temperature.
- Dual-Element Heating Architecture: The center zone is powered by Super-1800 Molybdenum Disilicide (MoSi2) heating elements reaching 1700°C, while the two side zones utilize Silicon Carbide (SiC) elements for stable operation up to 1400°C. This hybrid design optimizes energy efficiency and heating performance across the entire 25-inch heated length.
- Advanced PID Control Logic: Each of the three controllers features 30 programmable segments, offering self-tuning capabilities and sophisticated protection for overheated or broken thermocouples. This ensures linear heating rates and stable soak times, minimizing thermal shock to delicate samples.
- High-Purity Alumina Tube Environment: Built with a 99.8% purity alumina tube, the equipment provides an exceptionally inert atmosphere for processing. This high-density material prevents contamination and resists chemical attack from aggressive precursors during high-temperature CVD operations.
- Superior Vacuum and Atmospheric Integrity: Equipped with stainless steel vacuum sealing flanges that include integrated valves and pressure meters, this unit can achieve vacuum levels as low as 10-4 Torr when paired with a turbo pump. The double-gasket design ensures airtight performance for processing under inert or reducing gases.
- Engineered Thermal Insulation: The furnace utilizes high-purity fibrous alumina insulation, which offers low thermal conductivity and low heat storage. This design allows for faster heating and cooling cycles while significantly reducing the energy consumption required to maintain high-temperature stability.
- Robust Safety and Cooling Systems: A double-layer steel case with integrated dual cooling fans maintains a safe external surface temperature. This design protects laboratory personnel and internal electronic components, significantly extending the operational lifespan of the control systems.
- Multi-Zone Thermocouple Integration: The system employs one B-type thermocouple for the high-temperature central zone and two S-type thermocouples for the side zones. This configuration provides the highest levels of measurement accuracy and responsive feedback for the PID controllers.
- Customizable Gas Delivery Options: The standard barbed hose fittings can be upgraded to KF25 adapters or Swagelok tube fittings, allowing for seamless integration with high-vacuum systems or high-pressure gas delivery manifolds for advanced thin-film growth.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Epitaxial Film Growth (CVD) | Vaporizing precursors in an upstream zone and depositing them on a substrate in the central high-temp zone. | Precision control over film thickness and molecular structure. |
| Nanowire Synthesis | Facilitating Gallium Oxide (Ga2O3) growth where catalyst alloying and axial growth require distinct thermal stages. | Optimized morphologic regularity and improved electronic properties. |
| Thermal Gradient Sintering | Subjecting ceramic or metallic samples to controlled temperature variations across their length. | Enables the study of phase transitions and diffusion kinetics in a single run. |
| Electronic Component Aging | Testing the durability of high-power semiconductor materials under extreme, localized heat. | High-reliability testing that simulates real-world high-stress environments. |
| Powder Calcination | Processing chemical catalysts or battery materials under high-purity vacuum or inert gas. | Prevents oxidation and ensures high-purity end products for energy storage applications. |
| Annealing and Tempering | Stress-relieving precision metal alloys in a controlled environment to enhance mechanical properties. | Eliminates internal stresses without compromising surface finish or purity. |
| Phase Diagram Mapping | Rapidly determining temperature-dependent material properties using the flexible 3-zone architecture. | Significant reduction in R&D time for the discovery of new functional materials. |
Technical Specifications
| Feature | Specification Details (TU-79) |
|---|---|
| Product Model Series | TU-79 |
| Voltage | AC 208-240V Single Phase, 50/60 Hz |
| Power Consumption | 10 KW (Requires 75A air breaker) |
| Zone 1 Characteristics | 7.5" (190 mm) length; 4x SiC elements; 400 - 1400°C (up to 1500°C for <1hr) |
| Zone 2 (Center) Characteristics | 10.0" (250 mm) length; 6x MoSi2 elements; 800 - 1700°C |
| Zone 3 Characteristics | 7.5" (190 mm) length; 4x SiC elements; 400 - 1400°C (up to 1500°C for <1hr) |
| Total Heating Zone Length | 25" (630 mm) total including two refractory separators |
| Constant Temperature Zone | 200 mm length with accuracy of ± 1°C (with all controllers synchronized) |
| Maximum Heating Rate | ≤ 10°C/min (side zones); ≤ 5°C/min (center zone) |
| Tube Material and Size | 99.8% Purity Alumina; OD options: 60mm, 80mm, or 100mm; Length 1200mm |
| Vacuum Sealing | Stainless steel flanges with valves and meters; Dual gaskets included |
| Vacuum Pressure Limit | Up to 10-4 Torr with turbo pump (Use limited to <1500°C for vacuum) |
| Temperature Controllers | Three digital PID controllers, 30 segments, auto-tuning, ± 1°C accuracy |
| Thermocouple Types | One Type B (Center), Two Type S (Sides); 210mm insertion length |
| Safety & Compliance | CE Certified; NRTL/CSA available upon request |
| Casework | Double-layer steel with two high-speed cooling fans |
Why Choose Us
- Sophisticated Thermal Engineering: By utilizing a unique combination of MoSi2 and SiC heating elements, this furnace provides a wider operational range and more stable thermal gradients than standard single-element systems.
- Unmatched Atmosphere Control: The inclusion of high-purity alumina tubes and precision stainless steel vacuum flanges ensures a contaminant-free environment for the most sensitive chemical vapor deposition and semiconductor processes.
- Industrial Grade Reliability: With a double-walled steel construction and CE-certified electronic components, this system is built to withstand the rigors of continuous high-temperature R&D work without degradation.
- Precision and Programmability: Each of the three zones is managed by separate 30-segment PID controllers, allowing for complex, multi-stage recipes that can be synchronized or programmed for distinct thermal deltas.
- Customizable and Future-Proof: THERMUNITS offers extensive optional upgrades including European-made high-precision controllers, LabVIEW-based software management, and specialized gas delivery fittings to meet evolving research requirements.
Our technical engineering team is ready to help you configure the ideal furnace setup for your specific research needs; please contact us today for a detailed quote or to discuss custom system modifications.
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