대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

$LaCoO_3$ 후막 소자의 가스 감지 특성

Sensing characteristics of $LaCoO_3$ thick-films for gases

  • 신정호 (경상대학교 전자재료공학과) ;
  • 장재영 (경상대학교 전자재료공학과) ;
  • 김준곤 (경상대학교 전자재료공학과) ;
  • 김태중 (경상대학교 전자재료공학과) ;
  • 박기철 (경상대학교 전자재료공학과) ;
  • 김정규 (경상대학교 전자재료공학과)
  • Shin, Jeong-Ho (Dept. of Electronic Materials Eng., Gyeongsang national University) ;
  • Jang, Jae-Young (Dept. of Electronic Materials Eng., Gyeongsang national University) ;
  • Kim, Jun-Gon (Dept. of Electronic Materials Eng., Gyeongsang national University) ;
  • Kim, Tae-Jung (Dept. of Electronic Materials Eng., Gyeongsang national University) ;
  • Park, Ki-Chul (Dept. of Electronic Materials Eng., Gyeongsang national University) ;
  • Kim, Jeong-Gyoo (Dept. of Electronic Materials Eng., Gyeongsang national University)
  • 발행 : 1999.07.19
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초록

$LaCoO_3$ thick-film sensors were fabricated on alumina substrate by screen printing method. The sensitivity for gases was investigated by varying the heat treatment temperature of the films. X-Ray Diffractions and SEM photographs were used to examine their structural properties. The sensitivity of $LaCoO_3$ thick-film for CO gas was much better than for $C_4H_{10}$, $NH_3$ and NO gases. The best condition of heat treatment was $800^{\circ}C$ and the optimal operating temperature of $LaCoO_3$ thick-film for the highest sensitivity was $150^{\circ}C$. Sensitivities of the $LaCoO_3$ thick-film at 500ppm and l000ppm for CO gas were 72% and 95%, respectively.

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