Effect of grain size on the response to oxygen gas of CuFeTe2 ceramics

Yuta Tokunaga, Masatoshi Kozaki, Hisao Kuriyaki, Kiyoshi Toko

Research output: Contribution to journalArticlepeer-review


Oxygen gas sensor based on oxygen intercalation in the layered semiconductor CuFeTe2 has been developed. In this study, fine powder was obtained by pulverizing CuFeTe2 single crystal. Three groups with the range of grain size: 0 - 20 μm, 20 - 40 μm and 40 - 63 μm, was divided by sieves from the powder. CuFeTe2 ceramics was synthesized with each group. We measured the response to oxygen gas of these ceramics. Sensitivity is defined as a saturation value of resistance change rate when oxygen intercalation occurs. It has been shown from experimental results that the sensitivity improved by 7.0 times with making grain size smaller from 40 - 63 μm to 0 - 20 μm.

Original languageEnglish
Pages (from-to)422-425
Number of pages4
JournalIEEJ Transactions on Sensors and Micromachines
Issue number12
Publication statusPublished - 2017

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Electrical and Electronic Engineering


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