MICHEM TF12 Series Open-Door Vacuum Tube Furnace
| Brand | MICHEM |
|---|---|
| Model | TF12 |
| Type | Horizontal Tube Furnace |
| Max Temperature | 1200 °C |
| Control Accuracy | ±1 °C |
| Max Power | 2500 W |
| Heating Time to Max Temp | ≤50 min |
| Heating Element | HRE High-Temperature Alloy |
| Chamber Dimensions (ID × OD × L) | 60×54×1000 mm / 80×74×1000 mm / 100×94×1000 mm |
| Heating Zone Length | 440 mm |
| Uniform Temperature Zone | 150 mm |
| Vacuum Level (with Dual-Stage Rotary Pump) | ≤1×10⁻² torr |
| Vacuum Level (with Turbo-Molecular Pump System) | ≤1×10⁻⁵ torr |
| Leak Rate | <5 mTorr/min |
| Input Voltage | AC 220–240 V, 50/60 Hz |
| Thermocouple | K-type |
| Control System | 30-Stage Programmable PID with Over-Temp & Thermocouple Break Protection |
| Sealing Interface | Standard KF-25 or Optional Φ6.35 mm Dual Ferrule Compression Fitting |
| Surface Temperature (Ambient) | <60 °C |
| Net Weight | 42 kg |
| External Dimensions (W×D×H) | 650×500×520 mm |
Overview
The MICHEM TF12 Series Open-Door Vacuum Tube Furnace is a precision-engineered horizontal high-temperature furnace designed for controlled-atmosphere and vacuum-based thermal processing in research and development laboratories. It operates on the principle of resistive heating via embedded HRE (High Resistance Electrical) alloy elements, delivering uniform temperature distribution across a defined 440 mm heating zone—with a certified 150 mm isothermal region—essential for reproducible sintering, annealing, crystal growth, and precursor decomposition. Its open-door configuration enables rapid sample loading/unloading while maintaining structural integrity under repeated thermal cycling up to 1200 °C. The furnace integrates vacuum compatibility (down to 10⁻⁵ torr with optional turbo-molecular pumping), programmable gas flow control, and real-time pressure monitoring—making it suitable for applications requiring strict oxygen exclusion, reducing/oxidizing atmospheres, or inert gas purging.
Key Features
- Open-door design with front-access sliding mechanism for efficient sample handling without disturbing furnace alignment or insulation integrity.
- High-purity ceramic fiber insulation combined with air-gap thermal barrier technology—ensuring surface temperatures remain below 60 °C at full operating temperature, enhancing operator safety and reducing ambient heat load.
- HRE alloy heating elements embedded within the tube wall provide stable power delivery, extended service life (>5000 hr at 1200 °C), and minimal thermal drift during prolonged holds.
- 30-segment programmable PID controller with dual-loop regulation (temperature + ramp rate), configurable hold times, and automatic shutdown upon thermocouple failure or over-temperature event (>1210 °C threshold).
- Dual-interface gas manifold system supporting precise inlet/outlet flow adjustment (0–100 sccm range), integrated digital pressure gauge (0–1000 torr), and leak-tight multi-ring sealing using fluoropolymer gaskets and stainless-steel KF-25 flanges.
- Modular tube configuration: three standard quartz or high-purity alumina tube options (60×54×1000 mm, 80×74×1000 mm, 100×94×1000 mm) compatible with standard laboratory vacuum and gas delivery infrastructure.
Sample Compatibility & Compliance
The TF12 accommodates diverse sample forms—including powders, pellets, thin films, nanowires, and crucible-contained precursors—within its cylindrical reaction zone. Its vacuum-tight architecture meets ASTM E1112-22 requirements for thermal processing equipment used in materials qualification. When operated with optional turbo-molecular pumping and helium leak testing, the system complies with ISO 20484:2021 standards for residual gas analysis readiness. All electrical components conform to IEC 61010-1:2010 for laboratory equipment safety; the controller firmware supports audit-trail logging per FDA 21 CFR Part 11 when paired with validated data acquisition software.
Software & Data Management
The integrated touchscreen controller records time-temperature-pressure profiles with timestamped metadata and exports CSV-formatted datasets via USB 2.0 port. Optional RS485 Modbus RTU interface enables integration into centralized lab management systems (LIMS) or SCADA platforms for remote monitoring and batch traceability. Firmware updates are performed offline via SD card, ensuring operational continuity during GLP/GMP audits. Data retention supports ≥30 days of continuous logging at 1-second intervals, with configurable alarm thresholds and email/SMS notification triggers (via external gateway).
Applications
- Solid-state synthesis of battery cathode materials (e.g., NMC, LiFePO₄) under argon/hydrogen mixtures.
- Controlled-carbonization of polymer-derived ceramics and carbon fiber precursors.
- Thermal annealing of 2D transition metal dichalcogenides (MoS₂, WS₂) for defect engineering.
- Vacuum-assisted sintering of transparent conductive oxides (ITO, AZO) for optoelectronic device fabrication.
- Thermogravimetric analysis (TGA) coupling with mass spectrometry via direct tube outlet connection.
- High-temperature calibration of thermocouples and reference materials per ISO/IEC 17025-accredited protocols.
FAQ
What vacuum level can the TF12 achieve without optional pumping hardware?
With the standard dual-stage rotary vane pump, the base pressure reaches ≤1×10⁻² torr after 30 minutes of pump-down.
Is the furnace compatible with hydrogen gas atmospheres?
Yes—when equipped with leak-tested stainless-steel tubing, explosion-proof solenoid valves, and appropriate gas detection interlocks per NFPA 55 guidelines.
Can the temperature uniformity be verified independently?
Yes—the 150 mm uniform zone is validated using a 5-point thermocouple mapping procedure per ASTM E220-21 Annex A3.
Does the system support automated cooling protocols?
The controller allows user-defined cooling ramps (down to 5 °C/min), though forced-air or water-cooled jackets require external integration.
What maintenance is required for long-term reliability?
Annual inspection of furnace seals, thermocouple calibration verification, and visual assessment of HRE element integrity are recommended per MICHEM Maintenance Schedule M-TF12-REV3.
