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Fast Seebeck coefficient measurement based on dynamic method.

Yang Zhou1, Donghua Yang1, Liangliang Li1

  • 1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China.

The Review of Scientific Instruments
|June 2, 2014
PubMed
Summary
This summary is machine-generated.

A novel dynamic method enables rapid Seebeck coefficient measurement up to 473 K. This setup offers reliable thermoelectric property analysis with a fast measurement speed of 14-23 K/min.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Thermoelectrics

Background:

  • Accurate Seebeck coefficient measurement is crucial for evaluating thermoelectric materials.
  • Traditional methods can be time-consuming, limiting high-throughput material screening.
  • Dynamic temperature measurement techniques offer potential for faster characterization.

Purpose of the Study:

  • To develop and validate a dynamic method for rapid Seebeck coefficient measurement.
  • To assess the reliability and accuracy of the developed setup.
  • To investigate the influence of dynamic temperature variations on measurement errors.

Main Methods:

  • A custom setup utilizing two T-type thermocouples (response time < 0.1 s) for dynamic temperature measurement.
  • Copper (Cu) wires from thermocouples used as voltage leads for Seebeck coefficient determination.
  • Characterization of the setup's dynamic temperature response.
  • Validation using lanthanum cobalt copper oxide (LaCoO3) based ceramic samples.

Main Results:

  • The developed setup achieved a fast Seebeck coefficient measurement speed of 14-23 K/min.
  • Measurements on LaCo(0.9)Cu(0.1)O3 and LaCo(0.85)Cu(0.15)O3 samples showed good agreement with a commercial ZEM-2 system (±8.4% difference).
  • The reliability of the dynamic measurement technique was confirmed.

Conclusions:

  • The custom dynamic method provides a reliable and fast approach for Seebeck coefficient measurement.
  • This technique is suitable for rapid characterization of thermoelectric materials within the temperature range of room temperature to 473 K.
  • Further analysis on dynamic temperature variation errors can optimize measurement accuracy.