Analyzing BaSrTiO<sub>3</sub> gas sensor properties under NO<sub>2</sub> exposure: the impact of impedance spectroscopy

Authors

  • Bartłomiej Szafraniak Institute of Electronics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
  • Łukasz Fuśnik Institute of Electronics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
  • Jie Xu State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China https://orcid.org/0000-0001-7317-2450
  • Feng Gao State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
  • Andrzej Brudnik Institute of Electronics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
  • Sabina Drewniak Department of Optoelectronics, Silesian University of Technology, ul. Krzywoustego 2, 44-100 Gliwice, Poland
  • Erwin Maciak Department of Optoelectronics, Silesian University of Technology, ul. Krzywoustego 2, 44-100 Gliwice, Poland
  • Łukasz Błajszczak Department of Surface Engineering and Materials Characterization, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
  • Artur Rydosz Institute of Electronics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

DOI:

https://doi.org/10.24425/mms.2025.152774

Keywords

impedance spectroscopy, gas sensors, nitrogen dioxide, barium strontium titanate, BaSrTiO3

Abstract

Impedance spectroscopy is an appropriate technique for studying the complexity of materials, in which their different frequency relationships can be exploited in such a manner that they can be efficiently separated. Barium strontium titanate BaSrTiO3 (BST) is a ferroelectric material with unique properties that make it useful in a range of electronic applications. BST plays an important role in the field of gas-sensing applications. The potential application of BST material as a gas sensor for detecting nitrogen dioxide (NO2) in the atmosphere was studied. Impedance spectroscopy studies were conducted across a wide frequency range from 10-1 to 106 Hz, in the temperature range of 100˚C to 350˚C and a relative humidity of 50%, and both in air and the presence of NO2 in concentrations from 0.5 to 5 ppm. The results of the impedance analysis indicate that the broadband models, which comprise both single and parallel RC elements, can accurately represent the NO2 gas interaction mechanism with the gas-sensitive layer of the BST material. These models were found to effectively capture changes in parameters associated with the interaction.

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Published

2025-03-30

How to Cite

Szafraniak, Bartłomiej, et al. “Analyzing BaSrTiO<sub>3< sub> Gas Sensor Properties under NO<sub>2< sub> Exposure: The Impact of Impedance Spectroscopy”. Metrology and Measurement Systems, vol. 32, no. 1, Mar. 2025, pp. art. no. 7, 1-19, doi:10.24425/mms.2025.152774.

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Vol. 32 No. 1 (2025)

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Articles