Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Current-voltage Characteristics of PTC Ceramics by Changing Donor Concentration and Specimen Thickness

Donor 첨가량과 시편두께에 따른 PTC 세라믹스의 전류-전압 특성

  • 한응학 (서울대학교 무기재료공학과) ;
  • 강영석 (서울대학교 무기재료공학과) ;
  • 박순자 (서울대학교 무기재료공학과)
  • Published : 1991.08.01
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Abstract

The current-voltage characteristics of the semiconducting BaTiO3 ceramics are measured in the range of 0.01∼100 Volt. Non ohmic behavior was observed above Tc. This behavior is not dependent on specimen thickness and is not observed at the incomplete semiconducting sepcimen. From this experiment, non-ohmic behavior of PTC is attributed to Heywang's potential barrier not to space change limited current. In the low voltage range, current-voltage characteristics of PTC ceramics can be explained by Heywang model.

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References

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