Effect of Grain Size on the Response to Oxygen Gas of CuFeTe<sub>2</sub> Ceramics

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  • Tokunaga Yuta
    Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University
  • Kozaki Masatoshi
    Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University
  • Kuriyaki Hisao
    Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University
  • Toko Kiyoshi
    Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University

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Other Title
  • 層状半導体CuFeTe<sub>2</sub>を利用した酸素センサ作製における結晶粒径の検討
  • 層状半導体CuFeTe₂を利用した酸素センサ作製における結晶粒径の検討
  • ソウジョウ ハンドウタイ CuFeTe ₂ オ リヨウ シタ サンソ センサ サクセイ ニ オケル ケッショウ リュウケイ ノ ケントウ

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Abstract

<p>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.</p>

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