Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Characteristics of thick film Co2 sensors attached with Na2CO3-CaCO3 auxiliary phases

Na2CO3-CaCO3 보조상을 사용한 후막형 Co2 센서의 특성연구

  • Shim, H.B. (Dept. of Materials Science and Engineering, University of Seoul) ;
  • Choi, J.W. (Dept. of Materials Science and Engineering, University of Seoul) ;
  • Kang, J.H. (Dept. of Materials Science and Engineering, University of Seoul) ;
  • Yoo, K.S. (Dept. of Materials Science and Engineering, University of Seoul)
  • 심한별 (서울시립대학교 신소재공학과) ;
  • 최정운 (서울시립대학교 신소재공학과) ;
  • 강주현 (서울시립대학교 신소재공학과) ;
  • 유광수 (서울시립대학교 신소재공학과)
  • Published : 2006.05.31
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Abstract

Potentiometric $CO_{2}$ sensors were fabricated using a NASICON ($Na_{1+x}Zr_{2}Si_{X}P_{3-X}O_{12}$, 1.8 < x < 2.4) thick film and auxiliary layers. The powder of a precursor of NASICON with high purity was synthesized by a sol-gel method. By using the NASICON paste, an electrolyte was prepared on the alumina substrate by screen printing and then sintered at $1000^{\circ}C$ for 4 h. A series of $Na_{2}CO_{3}-CaCO_{3}$ auxiliary phases were deposited on the Pt sensing electrode. The electromotive force (emf) values were linearly dependent on the logarithm of $CO_{2}$ concentration in the range between 1,000 and 10,000 ppm. The device attached with $Na_{2}CO_{3}-CaCO_{3}$ (1:2 in mol.%) showed good sensing properties in the low temperatures.

Keywords

References

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