Features of gas environment influence on the electrical properties of nano- and microcrystals ZnO

Authors

  • O. V. Kovalenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. Yu. Vorovsky Oles Honchar Dnipro National University, Dnipro, Ukraine
  • A. Yu. Lyashkov Oles Honchar Dnipro National University, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332320

Keywords:

sensor, zinc oxide, electrical conductivity, nanomaterial, ceramics, chemisorption

Abstract

Nanocrystalline powder based on ZnO:Mn is used to create sensitive elements of gas sensors. It is shown that the nanocrystalline material has a structure similar, from an energy point of view, to the structure of micro-sized ZnO:Ag ceramics, which contains intercrystalline potential barriers formed by chemisorbed oxygen.
Adsorbed water can have a significant effect on the electrical conductivity of sensors at operating temperatures below T = 100oC. When evacuated, flammable gases such as propane or butane influence electrical conductivity opposite to what is observed in a normal air atmosphere containing oxygen.

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Published

29-12-2023

Issue

Vol. 31 No. 2 (2023)

Section

Articles