Abstract
The AC aging characteristics and mechanism of ZnO varistors have been widely concerned for a long time. In this paper, accelerated aging test of ZnO varistors was carried out based on the “ten degrees and a half” rule, power loss and thermally stimulated current (TSC) of samples were tested during each aging stage. The test results show that with the increasing of aging time, the power loss increases, the trapped charges increase and the trap level becomes deeper. In addition, the increase of power loss and the increase of trapped charge with the aging time have the same trend. A preliminary analysis shows that the migration of interstitial zinc ions will change the space charge distribution and decrease the Schottky barrier height to cause the change of the trap level.
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References
Wu W H, He J L, Gao Y M. Properties and Applications of Nonlinear Metal Oxide Varistors. Beijing: Tsinghua University Press, 1998. 2–8
Matsuoka M. Nonohmic properties of zinc oxide ceramic. J Appl Phys, 1971, 10(6): 736–746
Eda K, Atsushi Iga A, Matsuoka M. Degradation mechanism of non-Ohmic zinc oxide ceramics. J Appl Phys, 1980, 51(5): 2678–2684
Eda K. Conduction mechanism of non-ohmic zinc oxide ceramics. J Appl Phys, 1978, 49(5): 2964–2972
Eda K. Destruction mechanism of ZnO varistors due to high currents. J Appl Phys, 1984, 56(10): 2948–2956
Gupta T K, Carlson W G. A grain-boundary defect model for instability/stability of a ZnO varistor. J Mater Sci, 1985, 20(10): 3487–3500
Gupta T. Barrier voltage and its effect on stability of ZnO varistor. J Appl Phys, 1982, 53(11): 7401–7409
Chiang Y M, Kingery W D, Levinson L M. Compositional changes adjacent to grain boundaries during electrical degradation of a ZnO varistor. J Appl Phys, 1982, 53(3): 1765–1768
Zhang S G, Ji Y Z. Degradation mechanism of ZnO varistors. Funct Mater, 1993, 14(6): 529–532
Li S T, Liu F Y, Song X L, et al. New idea of degradation mechanism of ZnO nonohmic ceramics. Proc CSEE, 1993, (S1): 41–45
Pei G L, He J L. Effects of interior micro-cracks on the aging of ZnO nonlinear varistors. Insulators and Surge Arresters, 2002, 185(1): 28–30, 32
Sonder E. Role of short-circuiting pathways in reduced ZnO varistors. J Appl Phys, 1985, 58(11): 4420–4425
Xu X Z, Zhao Y Y. Review for accelerated aging test of ZnO varistors. Insulators and Surge Arresters, 1993, (01): 38–39, 42
Hu M. Discussion on accelerated aging test conditions of ZnO varistors. Insulators and Surge Arresters, 1992, (05): 49–54
Wang L H. The Hot Stimulatly Theory and Its Aplication of Medium. Beijing: Science Press, 1988. 109–164
Eda K. Zinc oxide varistors. IEEE Electr Insul M, 1989, 5(6): 28–30
Cheng P F, Li S T, Li J Y. Dielectric loss of ZnO varistor ceramics by variable temperature spectroscopy. Acta Phys Sin, 2009, 58(8): 5721–5724
Zhang M R. Studies on Degradation Mechanism of ZnO Varistor Ceramics. Xi’an: Xi’an Jiaotong University, 1991.
Zhao J M, Gu F, Zhao X H, et al. Semiconductor properties of anodic oxide film formed on aluminum. Acta Phys-Chim Sin, 2008, 24(1): 147–151
Chen Q H, Xie H K. Zinc Oxide Varistor Ceramics and Its Application in Power System. Beijing: Water Conservancy and Electric Power Press, 1992
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Tu, Y., Wang, Q., He, J. et al. TSC characteristics of AC aged ZnO varistors. Sci. China Technol. Sci. 56, 677–682 (2013). https://doi.org/10.1007/s11431-013-5137-1
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DOI: https://doi.org/10.1007/s11431-013-5137-1