Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Er2O3 Content on Nonlinear Properties and Impulse Clamping Characteristics of Pr/Co/Cr/Al Co-doped Zinc Oxide Ceramics

  • Nahm, Choon-Woo (Semiconductor Ceramics Laboratory, Department of Electrical Engineering, Dongeui University)
  • Received : 2014.08.26
  • Accepted : 2014.11.03
  • Published : 2014.11.30
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Abstract

The microstructure, nonlinear properties, and impulse clamping characteristics of Pr/Co/Cr/Al co-doped zinc oxide ceramics were investigated with various contents of $Er_2O_3$. Increasing $Er_2O_3$ content increased the density of the sintered pellets from 5.69 to $5.83g/cm^3$, and decreased the average grain size from 10.6 to $6.5{\mu}m$. With increased $Er_2O_3$ content, the breakdown field increased from 2318 to 4205 V/cm, and the nonlinear coefficient increased from 19.4 to 40.2. The clamp characteristics were improved with the increase of the content of $Er_2O_3$. The varistors doped with 2.0 mol% exhibited the best clamp characteristics, in which the clamp voltage ratio was 1.40-1.73 at 1-50 A in an impulse current.

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References

  1. L. M. Levinson and H. R. Philipp, "Zinc Oxide Varistor-A Review," Am. Ceram. Soc. Bull., 65 [4] 639-46 (1986).
  2. T. K. Gupta, "Application of Zinc Oxide Varistor," J. Am. Ceram. Soc., 73 [7] 1817-40 (1990). https://doi.org/10.1111/j.1151-2916.1990.tb05232.x
  3. D. R. Clarke, "Varistor Ceramics," J. Am. Ceram. Soc., 82 [3] 485-502 (1999).
  4. K. Mukae, K. Tsuda, and S. Shiga, "Zinc Oxide-prasedymium Oxide Elements for Surge Arresters," IEEE Tran. Power Delivery, 3 [10] 591-98 (1988). https://doi.org/10.1109/61.4296
  5. K. Mukae, "Zinc Oxide Varistors with Praseodymium Oxide," Am. Ceram. Bull., 66 [10] 1329-31 (1987).
  6. Y. S. Lee and T. Y. Tseng, "Phase Identification and Electrical Properties in ZnO-glass Varistors," J. Am. Ceram. Soc., 75 [6] 1636-40 (1992). https://doi.org/10.1111/j.1151-2916.1992.tb04236.x
  7. K. Mukae and K. Tsuda, "C-t Characteristics of Pr Doped ZnO Varistors," Jpn. J. Ceram. Soc., 100 [3] 1048-52 (1992). https://doi.org/10.2109/jcersj.100.1048
  8. A. B. Alles and V. L. Burdick, "The Effect of Liquid-phase Sintering on the Properties of $Pr_6O_{11}$-based ZnO Varistors," J. Appl. Phys., 70 [11] 6883-90 (1991). https://doi.org/10.1063/1.349812
  9. A. B. Alles, R. Puskas, G. Callahan, and V. L. Burdick, "Compositional Effect on the Liquid-phase Sintering of Praseodymium Oxides-based ZnO Varistors," J. Am. Ceram. Soc., 76 [8] 2098-102 (1993). https://doi.org/10.1111/j.1151-2916.1993.tb08339.x
  10. Y.-S. Lee, K.-S. Liao, and T.-Y. Tseng, "Microstructure and Crystal Phases of Praseodymium in Zinc Oxides Varistor Ceramics," J. Am. Ceram. Soc., 79 [9] 2379-84 (1996). https://doi.org/10.1111/j.1151-2916.1996.tb08986.x
  11. C.-W. Nahm and C.-H. Park, "Microstucture, Electrical Properties, and Degradation Behavior of Praseodymium Oxides-based Zinc Oxide Varistors Doped with $Y_2O_3$," J. Mater. Sci., 35 [12] 3037-42 (2000). https://doi.org/10.1023/A:1004749214640
  12. C.-W. Nahm, "The Nonlinear Properties and Stability of $ZnO-Pr_6O_{11}-CoO-Cr_2O_3-Er_2O_3$ Ceramic Varistors," Mater. Lett., 47 [3] 182-87 (2001). https://doi.org/10.1016/S0167-577X(00)00262-7
  13. C.-W. Nahm, J.-A. Park, B.-C. Shin, and I.-S. Kim, "Electrical Properties and DC-accelerated Aging Behavior of $ZnO-Pr_6O_{11}-CoO-Cr_2O_3-Dy_2O_3$-based Varistor Ceramics," Ceram. Int., 30 [6] 1009-16 (2004). https://doi.org/10.1016/j.ceramint.2003.10.020
  14. C.-W. Nahm, "Effect of Aluminum Addition on Electrical Properties, Dielectric Characteristic, and Its Stability of (Pr, Co, Cr, Y)-added Zinc Oxide-based Varistors," Mater. Sci. Bull., 33 [3] 239-45 (2010). https://doi.org/10.1007/s12034-010-0037-5
  15. H. Heng, X. Fu, Z. Fu, C. Wang, L. Qi, and H. Miao, "Effect of $TiO_2$ Doping on Microstructure and Electrical Properties of ZnO-$Pr_6O_{11}$-based Varistor Ceramics," J. Alloys Compd., 497 [1-2] 304-07 (2010). https://doi.org/10.1016/j.jallcom.2010.03.047
  16. Z. Peng, X. Fu, Y. Zang, Z. Fu, C. Wang, L. Qi, and H. Miao, "Influence of $Fe_2O_3$ Doping on Microstructure and Electrical Properties of ZnO-$Pr_6O_{11}$-based Varistor Ceramic Materials," J. Alloys Compd., 508 [2] 494-99 (2010). https://doi.org/10.1016/j.jallcom.2010.08.100
  17. H. Feng, Z. Peng, X. Fu, Z. Fu, C. Wang, L. Qi, and H. Miao, "Effect of $SnO_2$ Doping on Microstructural and Electrical Properties of ZnO-$Pr_6O_{11}$ Based Varistor Ceramics," J. Alloys Compd., 509 [25] 7175-78 (2011). https://doi.org/10.1016/j.jallcom.2011.04.042
  18. C.-W. Nahm, "Microstructure, Electrical Properties, and Aging Behavior of ZnO-$Pr_6O_{11}$-CoO-$Cr_2O_3$-$Y_2O_3$-$Er_2O_3$ Varistor Ceramics," Ceram. Int., 37 [8] 3049-54 (2011). https://doi.org/10.1016/j.ceramint.2011.05.032
  19. L-T. Mei, H-I. Hsiang, C-S. Hsi, and F-S. Yen, "$Na_2CO_3$ Doping Effect on ZnO-$Pr_6O_{11}$-$Co_3O_4$ Ceramic Varistor Properties," J. Alloys Compd., 558 [5] 84-90 (2013). https://doi.org/10.1016/j.jallcom.2013.01.047
  20. C.-W. Nahm, "Microstructure and Varistor Properties of $Y_2O_3$-doped ZnO-$Pr_6O_{11}$-CoO-$Cr_2O_3$-$La_2O_3$ Ceramics," Ceram. Int., 40 [1] 2477-81 (2014). https://doi.org/10.1016/j.ceramint.2013.07.007
  21. C.-W. Nahm, "Sintering Time Dependence of Varistor Properties and Aging Behavior in Co/Cr/La/Y Co-doped ZnO-$PrO_{1.83}$-based Ceramics, " Ceram. Int., 40 [8] 12561-65 (2014). https://doi.org/10.1016/j.ceramint.2014.03.164
  22. J. C. Wurst and J. A. Nelson, "Lineal Intercept Technique for Measuring Grain Size in Two-phase Polycrystalline Ceramics," J. Am. Ceram. Soc., 55 [97-12] 109-11 (1972). https://doi.org/10.1111/j.1151-2916.1972.tb11224.x