Prototype fabrication and performance evaluation of a thermoelectric module operating with the Nernst effect

Area of Science:

• Solid State Physics
• Materials Science
• Thermoelectrics

Background:

• The Nernst effect generates transverse voltage under a temperature gradient and magnetic field.
• Potential applications in thermoelectric generators and sensors exist, but practical modules are not yet implemented.

Purpose of the Study:

• To develop a prototype thermoelectric module utilizing the Nernst effect.
• To evaluate its performance and identify technical challenges.

Main Methods:

• Fabrication of a module with four BiSb-based sintered alloy bars on an AlN substrate.
• Series connection of bars using copper plates.
• Performance evaluation under a 5 T magnetic field.

Main Results:

• Achieved an output power of 0.48 mW with a 149 K temperature difference.
• Demonstrated a cooling effect of 82 mK with 100 mA applied electrical current.

Conclusions:

• The developed prototype validates the feasibility of Nernst effect-based thermoelectric modules.
• Identified technical issues for future optimization of thermoelectric generators and sensors.