Investigation of the Structural and Electrical Characteristics of Thermoelectric Glass 20Li₂O-40V₂O₅-20B₂O₃-20ZnO with Bi₂Te₃ Doping

Abstract

The conventional melt-quenching synthesis was used to produce a series of thermoelectric glasses with the compositions 20Li₂O-40V₂O₅-20B₂O₃-20ZnO (LVBZ) with Bi₂Te₃ doping as a percentage is 0, 5, 10, 15, 20, and 25 by weight. To discover the potential of thermoelectric glass, a comprehensive study was conducted on a series of samples using a combination of methods for analyzing both their structural and electrical properties. The structure exhibits the findings of the X-ray diffraction (XRD) analysis compositional investigation. It was discovered that the intensity within the LiV₃O₈ phase decreased with increasing dopant Bi₂Te₃ concentration, which produced an impact on the thermoelectric properties. The density value highest at 25 wt% doping and was 3.17 g/cm³. Furthermore, the thermoelectric properties of the samples were examined using ZEM-3 series instruments. The behavior of the semiconductor material is represented by the continual decrease in electrical resistivity value. The N-type thermoelectric material classification is represented by the verified Seebeck coefficient value. Out of the samples tested, the LVBZ with 15% Bi₂Te₃ doping by weight demonstrated the highest electrical performance in this series, with a power factor of 0.07 µW/mK² at 668 K. The examined power factor values lead to the conclusion that the result of electrical conductivity increases with testing temperature.

Keywords:

• Word
• melt-quenching
• thermoelectric glass
• power factor

Acknowledgments

The authors would like to thanks Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and Development Institution, Sakon Nakhon Rajabhat University for thermoelectric properties measurements. Thanks, are also due to Research and Development Institute, NPRU for facilities. K. Boonin and J. Kaewkhao would like to thanks National Research Council of Thailand (NRCT) and Thailand Science Research and Innovation (TSRI) for supporting this research.

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This project was funded by National Research Council of Thailand (NRCT) and TENSOR PRODUCTS LIMITED PARTNERSHIP for project number N41A650415.