Development of a Standard Reference Thermoelectric Module: Enhancing Durability and Reproducibility through Metallic...

Area of Science:

• Materials Science
• Solid State Physics
• Metrology

Background:

• Reproducibility and comparability in thermoelectric measurements are crucial for research.
• Current methods lack a standardized calibration platform, hindering cross-laboratory validation.
• There is an unmet need for a reliable standard module in thermoelectric research.

Purpose of the Study:

• To develop a standard reference thermoelectric module (SRTEM) for reproducible thermoelectric measurements.
• To provide a calibration platform for standardizing thermoelectric measurements across laboratories.
• To establish a scientifically validated reference standard for academic and industrial use.

Main Methods:

• Fabrication of SRTEM using p-type Chromel and n-type Constantan or Alumel alloys.
• Adoption of a "hollow hourglass" leg geometry to enhance thermal resistance and voltage output.
• Utilized direct metal-to-metal bonding for stable electrical contacts with low resistance.

Main Results:

• The SRTEM achieved an open-circuit voltage (Voc) of 89 mV, a 32.8% improvement over conventional modules.
• Demonstrated stable electrical contact with low resistance due to direct metal-to-metal bonding.
• Maintained consistent performance over 300 thermal cycles (~210 h) with no degradation.

Conclusions:

• The SRTEM serves as a reproducible calibration platform for thermoelectric measurements.
• The developed module offers enhanced voltage output and long-term performance stability.
• This SRTEM establishes a new standard for reliable thermoelectric evaluations in research and industry.