Joule Heating (JH) machines, often referred to as Flash Joule Heating (FJH) or Ultrafast High-Temperature Sintering (UHS) systems, have become essential tools for materials science. They allow researchers to reach extreme temperatures (up to 3,000°C+) in milliseconds, enabling the synthesis of materials that are impossible to create via traditional slow-heating furnaces.
Modern benchtop units typically consist of: (1) High-Voltage Capacitor Bank: Stores the energy required for the "Flash." (2) Pressure-Controlled Electrodes: Usually high-purity graphite or tungsten. They maintain physical contact with the powder or film while conducting the current. (3) Quartz/Ceramic Reaction Tube: Holds the sample under vacuum or inert gas (Argon/Nitrogen) to prevent oxidation. (4) High-Speed Pyrometer: A non-contact infrared thermometer that can read temperatures every 1–5 ms, which is critical since the entire reaction is over in the blink of an eye. (5) HMI Control System: A touch-screen interface where you program the voltage, pulse width (duration), and number of pulses.
| Part Number |
- EYBJHMS (Simplified Version)
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- EYBJHMF (Flagship Version)
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| Power |
- AC220V±10%, single phase, 50/60Hz, 3.5 kW
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- AC380V±10%, three-phases, 50/60Hz, 15-18 kW
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| Key Features for FJH Machine |
- Output Voltage: 0-12 V
- Output Current: 0-170 A
- Max. Heating Temperature: 1800℃
- Long-Term Heat Preservation: None
- Temperature Measuring Range: 100-1400℃/250-2000℃, infrared temperature measurement
- Heating Rate (current ramp time): ≤20ms
- Cooling Method: Forced air cooling
- Electrode Clamp: adjustable distance
- Sample Stage Material: Graphite paper, 50mm long graphite boat, 20mm long graphite tube, 50mm long tungsten boat
- Sample Stage Size: ≤55mm*10mm*0.05mm
- Testing Sample Amount: 50 mg
- Gas Flows; one pathway for gas inlet, one pathway for vacuum, and one pathway for ventilation.
- Vacuum Chamber: Aluminum alloy, square, Φ16mm observation window, sapphire window, volume about 400mL
- Vacuum Pump: OPR-DV2
- Cooling Water: One inlet and one outlet.
- Control System: PLC+HMI touch screen
- Data Recording: Time, Max. T, peak current, and peak voltage, speed: 5 ms
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- Output Voltage: 20-400 V
- Output Current: 0-500 A
- Max. Heating Temperature: 3000 °C, can sustain for 10 s.
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Long-Term Heat Preservation: 2000℃
- Temperature Measuring Range: 250-2000℃/700-3200℃/550-3000℃ (Imported), infrared temperature measurement.
- Heating Rate (current ramp time): ≤2ms
- Cooling Method: Circulated Water cooling
- Electrode Clamp: Fixed
- Sample Stage Material: Flexible graphite paper, graphite plate, graphite tube, graphite boat, etc.
- Sample Stage Size: ≤100mm*15mm*0.2mm
- Testing Sample Amount: 500 mg (1 cavity)
- Gas Flows; one pathway for gas inlet, one pathway for vacuum, and one pathway for ventilation.
- Vacuum Chamber: 304 stainless steel, square, Φ16mm observation window, sapphire window, volume about 400ml, cavity with water cooling
- Vacuum Pump: Standard VRD-8
- Cooling Water: One inlet and one outlet.
- Control System: PLC+HMI touch screen
- Data Recording: Time, Max. T, peak current, and peak voltage, speed: 5 ms
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| Certification |
- CE certified
- UL and CSA certification is available upon request at extra cost
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- CE certified
- UL and CSA certification is available upon request at extra cost
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| Dimension |
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References:
H. Wu, et al., Rapid Joule-Heating Synthesis for Manufacturing High-Entropy Oxides as Efficient Electrocatalysts, Nano Lett. 2022, 22, 16, 6492–6500
A. Griffin, et al., Design and Application of Joule Heating Processes for Decarbonized Chemical and Advanced Material Synthesis, Ind. Eng. Chem. Res. 2024, 63, 45, 19398–19417
J. Sheng, et al., Catalytic Joule heating synthesis of one-dimensional nanomaterials in seconds, Nature Synthesis, 2026, 5, 367–376.
