Tube Furnace
High Temperature Three Zone Tube Furnace 1700C with Alumina Tube and Water Cooled Flanges
Item Number: TU-85
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Product Overview


This high temperature three-zone tube furnace represents the pinnacle of thermal processing technology for material science and industrial R&D. Engineered to reach operating temperatures up to 1700°C, this system offers researchers the ability to perform complex heat treatments under strictly controlled atmospheres. The core value proposition lies in its three-zone heating architecture, which allows for unprecedented control over the thermal gradient, ensuring a significantly longer and more stable constant temperature zone compared to traditional single-zone units. This level of precision is essential for critical processes where even minor temperature fluctuations can compromise experimental integrity.
The equipment is specifically designed for high-stakes applications such as the growth of advanced semiconductor nanowires, homogenization of specialized alloys, and the sintering of technical ceramics. By providing a versatile platform that supports vacuum and various gas environments, this unit enables laboratories to transition seamlessly between different research protocols. Target industries include aerospace, microelectronics, and renewable energy, where materials must be tested and refined under extreme conditions to meet modern performance standards.
Built for the rigors of continuous industrial and laboratory use, the system features a robust double-layer steel case with integrated air-cooling technology. This engineering choice ensures that while the internal chamber reaches extreme temperatures, the exterior remains safe to touch, maintaining a productive and secure working environment. With high-purity alumina insulation and MoSi2 heating elements, the furnace is designed for long-term operational reliability and consistent performance, positioning it as a foundational investment for any high-temperature research facility.
Key Features
- Independently Controlled Three-Zone Heating: The system utilizes three separate heating zones (left, middle, and right) with individual PID controllers. This configuration allows for the creation of a custom thermal profile or a significantly extended 300 mm uniform temperature zone, which is vital for large-batch processing or long-form crystal growth.
- High-Performance MoSi2 Heating Elements: Equipped with 14 molybdenum disilicide (MoSi2) heating elements, this furnace achieves rapid heating rates and maintains stable temperatures up to 1700°C. These elements are chosen for their superior oxidation resistance and longevity in high-temperature environments.
- Precision Atmosphere Management: The unit features water-cooled stainless steel flanges with high-quality vacuum sealing. With integrated 1/4" gas inlets/outlets and KF25 vacuum ports, users can maintain hermetic environments for sensitive chemical vapor deposition (CVD) or annealing processes.
- Superior Thermal Insulation: Utilizing high-purity fibrous alumina insulation, the system minimizes heat loss and maximizes energy efficiency. This advanced insulation package ensures fast ramp-up times and excellent temperature stability during long-duration soaking periods.
- Advanced Safety and Cooling: The double-walled steel housing incorporates a forced-air cooling system that keeps the outer shell below 70°C. Furthermore, built-in safety interlocks protect against overheating and thermocouple failure, ensuring the equipment and the operator remain safe.
- Flexible Tube Dimensions: To accommodate varying sample sizes and throughput requirements, the system supports high-purity alumina tubes with outside diameters of 50 mm, 60 mm, or 80 mm. This flexibility allows researchers to optimize the furnace for specific experiment geometries.
- Programmable PID Controllers: Each of the three zones is managed by a digital controller offering 30 programmable segments for precise heating, dwelling, and cooling cycles. This automation reduces manual intervention and ensures repeatable process results across multiple runs.
- Refined Vacuum Connectivity: The inclusion of push-to-connect water ports and a vacuum sealing flange with a built-in valve and meter allows for rapid setup and precise monitoring of internal pressure conditions during vacuum processing.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Semiconductor Nanowire Growth | Facilitates the growth of Gallium Oxide (Ga2O3) and other nanowires by setting specific thermal stages across three zones. | Optimizes catalyst alloying and axial growth for superior morphology regularity. |
| Metallurgical Annealing | Used for the homogenization and diffusion annealing of Fe-Ni-Cu alloys at temperatures up to 1000°C. | Eliminates diffusion rate deviations by providing a uniform thermal history across the entire sample. |
| Ceramic Sintering | High-temperature firing of technical ceramics and advanced composites in controlled atmospheres. | Ensures consistent density and structural integrity through precise ramp and soak control. |
| CVD / PECVD Processes | Serves as the thermal reactor for chemical vapor deposition experiments requiring gas flow and vacuum. | Provides a stable reaction environment with hermetic sealing to prevent contamination. |
| Material Degradation Testing | Subjecting aerospace or industrial components to sustained 1650°C+ environments. | Simulates extreme operational conditions with high repeatability for durability verification. |
| Crystal Growth | Vapor transport and directional solidification techniques for synthesizing high-purity crystals. | Enables precise control of the temperature gradient necessary for high-quality crystal formation. |
Technical Specifications
| Parameter Group | Specification Detail | TU-85 Series Values |
|---|---|---|
| Maximum Temperature | Transient (<1 hr) | 1700 °C |
| Continuous Temperature | Sustained Operation | 1650 °C |
| Vacuum Temperature | Under Vacuum Conditions | 1500 °C |
| Heating Zones | Configuration | Three Zones: 195mm (L) / 220mm (M) / 195mm (R) |
| Total Heating Length | Combined Zones | 610 mm |
| Uniformity Zone | @ 1600 °C | 300 mm |
| Heating Elements | Type & Quantity | 14 pcs MoSi2 Heating Elements |
| Processing Tube | Material & Sizes | 99.8% Alumina; Ø 50, 60, or 80 mm OD x 1200 mm |
| Temperature Control | Accuracy & Segments | ± 1 ºC; 30 Programmable Segments per zone |
| Thermocouple | Sensor Type | Type B (Pt-Rh) |
| Power Requirements | Voltage & Phase | 208-240 VAC, 3-Phase (380-415 VAC optional) |
| Power Rating | Maximum Consumption | 15 kVA / 50 A |
| Vacuum Interface | Port Type | KF25 with Water-Cooled Stainless Steel Flanges |
| Gas Interface | Connections | 1/4" Compression Tube Fittings |
| Cooling System | Cooling Ports | Ø12 mm Push-to-connect for water inlet/outlet |
| Safety Features | Protective Systems | Over-temp protection; Broken thermocouple interlock; Air-cooled shell |
| Upgradable Options | 1800 °C Model | Available with Kanthal 1900°C elements & 1900°C alumina insulation |
Why Choose High Temperature Three Zone Tube Furnace
- Unmatched Thermal Precision: The triple-zone architecture allows for the correction of end-effect heat losses, providing a uniform temperature field that is critical for high-accuracy material research and industrial scaling.
- Premium Engineering Standards: From the molybdenum disilicide heating elements to the water-cooled stainless steel flanges, every component is selected for its ability to withstand extreme thermal and chemical stress.
- Versatility by Design: Whether your process requires a high vacuum, an inert gas blanket, or a specific thermal gradient for crystal growth, this system adapts to your technical requirements with ease.
- Proven Long-Term Reliability: Our use of high-grade alumina insulation and double-shell construction prevents structural fatigue and protects sensitive electronic components, ensuring a high return on investment through years of service.
- Expert Customization & Support: We provide optional upgrades including Eurotherm controllers with ± 0.1ºC accuracy and Labview-based software for remote data logging and recipe management.
Invest in a thermal solution that guarantees consistency and precision for your most demanding R&D projects; contact our technical sales team today for a detailed quote or to discuss a custom configuration tailored to your specific process requirements.
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