한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)

한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

$Er_2O_3$가 첨가된 ZnO-$Pr_6O_{11}$계 바리스터의 써지특성에 소결온도의 영향

Influence of Sintering Temperature on Surge Characteristics of $Er_2O_3$-Doped ZnO-$Pr_6O_{11}$-Based Varistors

  • 김명준 (동의대학교 전기공학과) ;
  • 박종아 (동의대학교 전기공학과) ;
  • 유대훈 (동의대학교 전기공학과) ;
  • 남춘우 (동의대학교 전기공학과)
  • 발행 : 2004.04.24
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The surge characteristics of $Pr_6O_{11}$-based ZnO varistors consisting of $ZnO-Pr_6O_{11}-CoO-Cr_2O_3-Er_2O_3$ ceramics were investigated with sintering temperature in the range of $1335{\sim}1345^{\circ}C$. As the sintering temperature is raised, the average grain size was marked1y increased in the range of $9.67{\sim}14.07\;{\mu}m$ and the ceramic density was increased in the range of $5.46{\sim}5.59\;g/cm^3$. While, the nonlinear exponent was decreased in the range of 64.9~44.1 and the clamping voltage ratio was improved in the range of 1.99~2.08. The best varistor properties was obtained from the varistors sintered at $1335^{\circ}C$, exhibiting a maximum (64.9) in the nonlinear exponent and a minimum (1.99) in the clamping voltage ratio.

키워드