The effects of annealing temperature on the sensing properties of low temperature nano-sized SrTiO3 oxygen gas sensor

Ying Hu, Ooi Kiang Tan, Jisheng S. Pan, Haitao Huang, Wenqing Cao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)

Abstract

A low temperature SrTiO3oxygen gas sensor was fabricated by high-energy ball milling and conventional screen-printing techniques. The thermal stability, grain size and lattice constant of the material and the sensing properties of sensor device at different annealing temperatures were studied using DTA/TGA, XRD, TEM and the gas sensor characterization system, respectively. The results show that the annealing temperature affects only the grain size of the synthesized nano-sized SrTiO3material but does not change its perovskite structure, confirming the thermal stability of the synthesized material. The sensing properties of sensor device are affected by the annealing temperature due to the change of the grain size of the material. The optimal relative resistance (Rnitrogen/R20% oxygen) value of 6.35 is obtained for the synthesized SrTiO3sample annealed at 400 °C and operating at 40 °C. The 40 °C optimum operating temperature is much lower than that for the conventional metal oxide semiconducting oxygen gas sensors (300-500 °C).
Original languageEnglish
Pages (from-to)244-249
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume108
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 22 Jul 2005
Externally publishedYes

Keywords

  • Annealing temperature
  • Grain size
  • Lattice constant
  • Low temperature oxygen gas sensor
  • Synthesized nano-sized SrTiO material 3

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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