Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Fabrication and Sensing Properties of Pt-electrode/NASICON Solid Electrolyte/ Carbonate(Na2CO3-K2CO3-CaCO3system ) Electrode for CO2gas sensor

CO2용 Pt전극/NASICON고체전해질/Carbonate (Na2CO3-K2CO3-CaCO3 계) 전극의 가스 센서제작 및 특성

  • Choi, Jin-Sam (Dept. of Materials Science and Metallurgy, Kyungpook National University) ;
  • Bae, Jae-Cheol (Dept. of Materials Science and Metallurgy, Kyungpook National University) ;
  • Bang, Yeong-Il (Dept. of Electromic and Electrical Eng., Kyungpook National University) ;
  • Lee, Deok-Dong (Dept. of Electromic and Electrical Eng., Kyungpook National University) ;
  • Huh, Jeung-Su (Dept. of Materials Science and Metallurgy, Kyungpook National University)
  • Published : 2002.04.01
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Abstract

The NASICON solid electrolyte films, $Na_{1+x}Zr_2Si_xP_{3-x}O_{12}$(1.5< x < 2.3), was prepared from ceramic slurry by modified doctor-blade process. The NASICON solid electrolyte and fabricated sensors, Pt-electrode/NASICON/Carbonate$(Na_2CO_3-K_2CO_3CaCO_3\; system)$ electrode, were investigated to measure phase, microstructure and e.m.f variation for sensing $CO_2$ concentration. The uniform grain size of $2-4{\mu}m$ and major phase of sodium zirconium silicon phosphate phase, $Na_{1+x}Zr_2Si_xP_{3-x}O_{12}$was identified with X-ray diffraction patterns and scanning electron microscopy, respectively. The Nernst's slope of 84 mV/decade for $CO_2$ concentration from 500 to 8000 ppm was obtained at operating temperature of $400^{\circ}C$.

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References

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