대한전기학회논문지:전기물성ㆍ응용부문C (The Transactions of the Korean Institute of Electrical Engineers C)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

고온가압소결한 $\alpha-SiC-ZrB_2$ 복합체의 전기전도기구

Electrical Conductive Mechanism of Hot-pressed $\alpha-SiC-ZrB_2$ Composites

  • 신용덕 (圓光大學 電氣電子工學部) ;
  • 주진영 (圓光大學 大學院 電氣工學科) ;
  • 권주성 (三養電子窯業(株) 附設 基礎 硏究所)
  • Shin, Yong-Deok (Dept.of Electric Electronics Information Engineering, Engineering College, Wonkwang University) ;
  • Ju, Jin-Young (Dept.of Electric Engineering Engineering College, Graduate School of Wonkwang University) ;
  • Kwon, Ju-Sung
  • 발행 : 1999.02.01
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초록

The electrical conductive mechanism and temperature dependence of electrical resistivity of $\alpha-SiC-ZrB_2$ composites with $ZrB_2$ contents were investigated. The electrical resistivity of hot-pressed composites was measured by the Pauw method form $25^{\circ} to 700^{\circ}C$. The electrical resistivity of the composites follow the electrical conduction model for a homogeneous mixture of two kind of particles with different conductivity. Also, the electrical resistivity versus temperature curves indicate the formation of local chains of $ZrB_2$ particles. In case of $\alpha-SiC-ZrB_2$ composites containing above 39vol.% $ZrB_2$ showed positive temperature coefficient resistance(PTCR), whereas the electrical resistivity of $\alpha-SiC-21vol.% ZrB_2$ showed negative temperature coefficient resistance(NTCR).

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참고문헌

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