Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Properties of Oxide Systems for NTC Thermistors

산화물계 NTC 서미스터의 특성

  • Lee, Sung-Kwan (Division of Advanced Materials Eng., Kyungnam University) ;
  • Lee, Hae-Yon (Division of Advanced Materials Eng., Kyungnam University) ;
  • Lee, Sean-Hag (Division of Advanced Materials Eng., Kyungnam University) ;
  • Her, Jeong-Seob (Division of Advanced Materials Eng., Kyungnam University) ;
  • Kim, Hyun-Sik (Division of Electrical Materials, KERI) ;
  • Oh, Young-Woo (Division of Advanced Materials Eng., Kyungnam University)
  • 이승관 (경남대학교 공과대학 신소재공학부) ;
  • 이해연 (경남대학교 공과대학 신소재공학부) ;
  • 이선학 (경남대학교 공과대학 신소재공학부) ;
  • 허정섭 (경남대학교 공과대학 신소재공학부) ;
  • 김현식 (한국전기연구소 전기재료연구부) ;
  • 오영우 (경남대학교 공과대학 신소재공학부)
  • Published : 1999.07.19
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Abstract

$Mn_{1-x}Fe_{2+x}O_4$, $Mg_{1-x}Fe_{2+x}O_4$ (x=0.0, 0.025, 0.1, 0.2) for negative temperature coefficient (NTC) thermistor were prepared by calcining at $800^{\circ}C$ and sintering from 1100 to $1250^{\circ}C$ with $50^{\circ}C$ intervals. The best linear property was obtained in the Mn-based sample sintered at $1200^{\circ}C$ with x=0.0 composition. Temperature coefficient of resistance, $\alpha$, was -3.0 %/$^{\circ}C$ in the Mg-based sample at $25^{\circ}C$. Thermistor parameter, B, was in the range of 2500 [K] $\sim$7400 [K]. The results show the possibility that Mn-Ni-Co based thermistor could be substituted by the composition used in this study.

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