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소결시간에 따른 ZnO-Pr6O11계 바리스터의 전기적, 유전적 특성

Electrical and Dielectric Properties of ZnO-Pr6O11 Varistors with Sintering Time

  • 남춘우 (동의대학교 전기공학과) ;
  • 박종아 (동의대학교 전기공학과) ;
  • 유대훈 (동의대학교 전기공학과)
  • 발행 : 2005.06.01

초록

The electrical and dielectric properties of $ZnO-Pr_6O_{11}-CoO-Cr_2O_3-based$ varistors were investigated in the sintering time range of $1\~3$ h. Increasing sintering time improved the densification of ceramics, whereas deteriorated the nonlinearity, in which the nonlinear exponent greatly decreased from 55.3 to 38.2 and the leakage current increased from 0.1 to $1.1\;{\mu}A$. The donor concentration and density of interface states increased in the range of $(1.06\~1.60)\times10^8/cm^3\;and\;(3.15\~3.67)\times10^{12}/cm^2$ with increasing sintering time, respectively. while, in dielectric properties, the increase of sintering time increased in the range of $0.0228\~0.0505$ in tans and $1.32\~1.36\;{\mu}s$ in relaxation time.

키워드

참고문헌

  1. ニユケラスシリズ 編集委員會, '半導体セ ラミクスとその應用', 學獻社, p. 149, 1990
  2. 電気學會, '酸化亜鉛素子の新適用技術動向', 電気學會技術報告, 第579号, p. 4, 1996
  3. K, Mukae, 'Zinc oxide varistors with praseodymium oxides', Ceram. Bull., Vol. 66, No.9, p. 1329, 1987
  4. Y.-S. Lee, K-S. Liao, and T.-Y. Tseng, 'Microstructure and crystal phases of prasodymium in zinc oxide varistor ceramics', J. Amer. Ceram. Soc., Vol. 79, No.9, p. 2379, 1996
  5. D. R. Clarke, 'Varistors ceramics', J. Amer. ceram. Soc., Vol. 82, No.3, p. 485, 1999
  6. S.-Y. Chun and N. Mitzutani, 'Mass transport via grain boundary in Pr-based ZnO varistors and related electrical effects', Mater. Sci. Eng. Vol. B79, No.1, p. 1, 2001
  7. C.-W. Nahm, 'The electrical properties and d.c. degradation characteristics of $Dy_2O_3$ doped $Pr_6O_{11}$-based ZnO varistors', J. Eur. Ceram. Soc., Vol. 21, No.4, p. 545, 2001
  8. C.-W. Nahm and C.-H. Park, 'Effect of $Er_2O_3$ addition on the microstructure, electrical properties, and stability of $Pr_6O_{11}$-based ZnO ceramic varistors', J. Mater. Sci., Vol. 36, No.7, p. 1671, 2001
  9. C.-W. Nahm and H.-S. Kim, 'Effect of $Pr_6O_{11}$/CoO mole ratio on nonlinear properties and DC accelerated aging characteristics of $ZnO-Pr_6O_{11}-CoO-Dy_2O_3$ based varistors', Mater. Lett., Vol. 56, No.4, p. 379, 2002
  10. 남춘우, 김향숙, 'ZPCCY계 바리스터 세라믹스의 소결시간에 따른 전기적, 유전적 특성', 전기전자재료학회논문지, 15권,11호, p. 946, 2002
  11. 남춘우, 박종아, 김병준, '$ZnO-Pr_6O_{11}-CoO-Cr_2O_3-Dy_2O_3$계 세 라믹스의 미세 구조 및 바리스터 특성', 전기전자재료학회논문지, 16권, 10호, p. 897, 2003
  12. 남춘우, 박종아, 김병준, '$Dy_2O_3$가 첨가된 ZPCCD계 바리스터의 DC 가속열화 특성', 전기전자재료학회논문지, 16권12호, p. 1071, 2003
  13. 남춘우, 박종아, 김명준, 유대훈, '소결온도에 따른 ZPCCE계 바리스터의 제한전압특성', 전기전자재료학회논문지, 17권8호, p. 835, 2004
  14. 남춘우, 박종아, 'Zn-Pr-Co-Dy-M(M=Ni, Mg, Cr) 산화물계 바리스터의 전기적, 유전적 특성', 전기전자재료학회논문지, 17권, 9호, p. 924, 2004
  15. 남춘우, 박종아, 유대훈, 'Zn -Pr-Co-Cr- Er 산화물계 바라스터의 써지 스트레스에 대한 전기적 안정성에 미치는 소결온도의 영향', 전기전자재료학회논문지, 17권,11호, p. 1156, 2004
  16. J. C. Wurst and J. A. Nelson, 'Lineal inter tpec technique for measuring grain size in two-phase polycrystalline ceramics', J. Amer. Ceram. Soc., Vol. 55, No. 97-12, p. 109, 1972
  17. K. Mukae, K. Tsuda, and I. Nagasawa, 'Capacitance-vs-voltage characteristics of ZnO varistors', J. Appl, Phys., Vol. 50, No. 6, p. 4475, 1979
  18. L. Hazer, 'Semiconductor ceramics; grain boundary effects', Ellis Horwood, p, 21, 1994