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Dielectric strength testing of ceramics can be performed with various setups and parameters. Comparisons of results from different sources are often not meaningful, because the results are strongly dependent on the actual testing procedure. The aim of this study is to quantify the influence of voltage ramp rate, electrode size, electrode conditioning, and sample thickness on the measured AC dielectric strength of a commercial alumina. Mean values, Weibull moduli, and failure probabilities determined in standardized short time tests are evaluated and related to withstand voltage tests. Dielectric strength values in the range from 21.6 to 33.2 kV∙mm-1 were obtained for the same material using different testing procedures. Short time tests resulted in small standard deviations (< 2 kV∙mm-1) and high Weibull moduli around 30, while withstand tests at voltage levels with low and virtual zero failure probability in short time tests resulted in large scatter of withstand time and Weibull moduli < 1. The strong decrease in Weibull moduli is attributed to progressive damage from partial discharge and depolarization during AC testing. These findings emphasize the necessity of a thorough documentation of testing procedure and highlight the importance of withstand voltage tests for a comprehensive material characterization.


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Influence of test procedure on dielectric breakdown strength of alumina

Show Author's information Bjoern MIELLER( )
Bundesanstalt fuer Materialforschung und -pruefung (BAM), Division Advanced Technical Ceramics, 12200 Berlin, Germany

Abstract

Dielectric strength testing of ceramics can be performed with various setups and parameters. Comparisons of results from different sources are often not meaningful, because the results are strongly dependent on the actual testing procedure. The aim of this study is to quantify the influence of voltage ramp rate, electrode size, electrode conditioning, and sample thickness on the measured AC dielectric strength of a commercial alumina. Mean values, Weibull moduli, and failure probabilities determined in standardized short time tests are evaluated and related to withstand voltage tests. Dielectric strength values in the range from 21.6 to 33.2 kV∙mm-1 were obtained for the same material using different testing procedures. Short time tests resulted in small standard deviations (< 2 kV∙mm-1) and high Weibull moduli around 30, while withstand tests at voltage levels with low and virtual zero failure probability in short time tests resulted in large scatter of withstand time and Weibull moduli < 1. The strong decrease in Weibull moduli is attributed to progressive damage from partial discharge and depolarization during AC testing. These findings emphasize the necessity of a thorough documentation of testing procedure and highlight the importance of withstand voltage tests for a comprehensive material characterization.

Keywords:

dielectric strength, dielectric breakdown, withstand voltage test, high AC voltage testing
Received: 20 September 2018 Revised: 03 December 2018 Accepted: 05 December 2018 Published: 13 June 2019 Issue date: June 2019
References(23)
[1]
R Gerson, TC Marshall. Dielectric breakdown of porous ceramics. J Appl Phys 1959, 30: 1650-1653.
[2]
IO Owate, R Freer. AC breakdown characteristics of ceramic materials. J Appl Phys 1992, 72: 2418-2422.
[3]
A Kishimoto, K Koumoto, H Yanagida. Mechanical and dielectric failure of BaTiO3 ceramics. J Mater Sci 1989, 24: 698-702.
[4]
A Kishimoto, K Koumoto, H Yanagida. Comparison of mechanical and dielectric strength distributions for variously surface-finished titanium dioxide ceramics. J Am Ceram Soc 1989, 72: 1373-1376.
[5]
AL Young, GE Hilmas, SC Zhang, et al. Mechanical vs. electrical failure mechanisms in high voltage, high energy density multilayer ceramic capacitors. J Mater Sci 2007, 42: 5613-5619.
[6]
D Malec, V Bley, F Talbi, et al. Contribution to the understanding of the relationship between mechanical and dielectric strengths of alumina. J Eur Ceram Soc 2010, 30: 3117-3123.
[7]
L Haddour, N Mesrati, D Goeuriot, et al. Relationships between microstructure, mechanical and dielectric properties of different alumina materials. J Eur Ceram Soc 2009, 29: 2747-2756.
[8]
C Neusel, H Jelitto, D Schmidt, et al. Thickness-dependence of the breakdown strength: Analysis of the dielectric and mechanical failure. J Eur Ceram Soc 2015, 35: 113-123.
[9]
T Hoshina, M Yamazaki, H Takeda, et al. Dielectric breakdown mechanism of perovskite-structured ceramics. Additional Conferences (Device Packaging, HiTEC, HiTEN, & CICMT) 2015, 2015: 000116-000120.
[10]
M Touzin, D Goeuriot, HJ Fitting, et al. Relationships between dielectric breakdown resistance and charge transport in alumina materials—Effects of the microstructure. J Eur Ceram Soc 2007, 27: 1193-1197.
[11]
J Liebault, J Vallayer, D Goeuriot, et al. How the trapping of charges can explain the dielectric breakdown performance of alumina ceramics. J Eur Ceram Soc 2001, 21: 389-397.
[12]
Z Suo. Models for breakdown-resistant dielectric and ferroelectric ceramics. J Mech Phys Solids 1993, 41: 1155-1176.
[13]
GA Schneider. A Griffith type energy release rate model for dielectric breakdown under space charge limited conductivity. J Mech Phys Solids 2013, 61: 78-90.
[14]
C Neusel, H Jelitto, GA Schneider. Electrical conduction mechanism in bulk ceramic insulators at high voltages until dielectric breakdown. J Appl Phys 2015, 117: 154902.
[15]
C Neusel, GA Schneider. Size-dependence of the dielectric breakdown strength from nano-to millimeter scale. J Mech Phys Solids 2014, 63: 201-213.
[16]
PK Fischer, GA Schneider. Dielectric breakdown toughness from filament induced dielectric breakdown in borosilicate glass. J Eur Ceram Soc 2018, 38: 4476-4482.
[17]
M Touzin, D Goeuriot, C Guerret-Piécourt, et al. Alumina based ceramics for high-voltage insulation. J Eur Ceram Soc 2010, 30: 805-817.
[18]
V Fuertes, MJ Cabrera, J Seores, et al. Hierarchical micro-nanostructured albite-based glass-ceramic for high dielectric strength insulators. J Eur Ceram Soc 2018, 38: 2759-2766.
[19]
XY Ye, YM Li, JJ Bian. Dielectric and energy storage properties of Mn-doped Ba0.3Sr0.475La0.12Ce0.03TiO3 dielectric ceramics. J Eur Ceram Soc 2017, 37: 107-114.
[20]
QB Yuan, J Cui, YF Wang, et al. Significant enhancement in breakdown strength and energy density of the BaTiO3/ BaTiO3@SiO2 layered ceramics with strong interface blocking effect. J Eur Ceram Soc 2017, 37: 4645-4652.
[21]
BC Luo, XH Wang, EK Tian, et al. Enhanced energy-storage density and high efficiency of lead-free CaTiO3-BiScO3 linear dielectric ceramics. ACS Appl Mater Interfaces 2017, 9: 19963-19972.
[22]
W Lei, YY Yan, XH Wang, et al. Improving the breakdown strength of (Mg0.9Zn0.1)2(Ti1-xMnx)O4 ceramics with low dielectric loss. Ceram Int 2015, 41: 521-525.
[23]
ASTM D149-09(2013). Standard test method for dielectric breakdown voltage and dielectric strength of solid electrical insulating materials at commercial power frequencies. ASTM International, West Conshohocken, PA, 2013.
Publication history
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Publication history

Received: 20 September 2018
Revised: 03 December 2018
Accepted: 05 December 2018
Published: 13 June 2019
Issue date: June 2019

Copyright

© The author(s) 2019

Acknowledgements

The author likes to thank W. Guether and J. Biberstein for performing the numerous measurements and S. Benemann (BAM Division 6.1) for SEM analysis.

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