Abstract
The low-temperature dependence of the DC dielectric breakdown strength (EBD) and the energy storage density (W) of capacitors, fabricated from high purity polycrystalline strontium titanate, were investigated in the temperature range from 295 K to 77 K. Test samples were constructed with a process similar to that used for multilayer ceramic capacitors (MLCCs). The permittivity, loss tangent, leakage current, and breakdown strength were measured as a function of temperature and voltage. Weibull statistical analysis was used to quantify breakdown distributions. Despite electric-field suppression of permittivity, breakdown strength increased significantly with decreasing temperatures, leading to enhanced energy density. The breakdown field increased from approximately 440 kV/cm at 295 K to 770 kV/cm at 77 K, while the corresponding energy density rose from 2.1 J/cm³ to 4.9 J/cm³, respectively. Possible mechanisms for the increase in breakdown voltage with decreasing temperatures are discussed.
Recommended Citation
H. Trinh et al., "Voltage breakdown strength and energy density of ceramic SrTiO₃ at cryogenic temperatures from 295 K to 77 K," Journal of Electroceramics, pp. 1 - 10, Springer, Mar 2026.
The definitive version is available at https://doi.org/10.1007/s10832-026-00472-x
Department(s)
Materials Science and Engineering
Publication Status
Open Access
Keywords and Phrases
Energy storage; Strontium titanate; Cryogenic temperatures; Capacitors; Dielectric; Voltage breakdown; Leakage current; Thick films
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2026 Springer Nature, All rights reserved
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
2026-03-31
Comments
Acknowledgements: We would like to express thanks to Dr. Ian Burn for many insightful and fruitful discussions. We also acknowledge contributions of our colleagues Nathan Hutchinson, Mary Halub, and Katia Brown.