Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Electrical Conduction Mechanism of SiC-$ZrB_2$ Composites

SiC-$ZrB_2$계(係) 복합체(複合體)의 전기전도기구(電氣傳導機溝)

  • 주진영 (권광대학교 공과대학 전기공학과) ;
  • 권주성 (권광대학교 공과대학 전기공학과) ;
  • 신용덕 (권광대학교 공과대학 전기공학과)
  • Published : 1997.07.21
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Abstract

Relations between the composites of SiC-$ZrB_2$ electro-conductive ceramic composites and their electrical resistivity, as well as their temperature, were investigated. The electrical resistivity of hot-pressed composites was measured by the Pauw method in the temperature of RT to $100^{\circ}C$. The electrical resistivity of the composites follow the electrical conduction model for a homogenous mixture of two kinds of particles with different conductivity. Also the electrical resistivity versus temperature curves indicate the formation of local chains of $ZrB_2$ particles. In the case of SiC-$ZrB_2$ composites containing above 30Vol.% $ZrB_2$ showed PTCR, whereas the electrical resistivity of SiC-15Vol.% $ZrB_2$ showed NTCR.

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