Breakthrough in Ceramics Research: Enhancing Breakdown Strength and Energy Storage Density

Strategic Insights -

Researchers at the School of Materials Science and Engineering in Jingdezhen, People's Republic of China, have made significant progress in improving the breakdown strength and energy storage density of dielectric ceramics. According to their study, published in Ceramics International, the introduction of MgO with high breakdown strength as a secondary modified phase enhances the energy storage density of BNT-based relaxor ferroelectrics. This research has been peer-reviewed and holds promise for improving pulse power technologies.

Key Takeaways:

  • Dielectric ceramics are critical components of energy storage capacitors, but their relatively low breakdown strength limits their energy storage density.
  • Researchers at the School of Materials Science and Engineering fabricated (Bi0.5Na0.5)(0.6)(Ba0.3Sr0.7)(0.4)TiO3 ceramics with MgO as a secondary modified phase using the spark plasma sintering (SPS) method.
  • The BNBST-4 wt% MgO ceramic sample exhibits a high recoverable energy density (W-rec) of 4.1 J/cm(3) under an electric field of 340 kV/cm.
  • The ceramics also present excellent temperature and frequency stability, good fatigue resistance, and ultra-fast charging-discharging characteristics.
  • Introducing MgO with high breakdown strength as a secondary modified phase is an effective strategy to improve the breakdown strength and energy storage density of BNT-based relaxor ferroelectrics.
  • This research provides more thinking to enhance electrical properties by utilizing advanced manufacturing technologies such as SPS.
  • The study was funded by the National Natural Science Foundation of China (NSFC) and the Graduate Innovation Fund of Jiangxi Province.

Statistics:

  • The BNBST-4 wt% MgO ceramic sample exhibits a high recoverable energy density (W-rec) of 4.1 J/cm(3) under an electric field of 340 kV/cm.
  • The researchers used the spark plasma sintering (SPS) method to fabricate the ceramics.
  • The study presents excellent temperature and frequency stability, with a stability range of -30°C to 120°C and a frequency stability of 1 kHz to 1 MHz.
  • The BNBST-4 wt% MgO ceramic sample exhibits good fatigue resistance, with a decrease in energy storage density of less than 20% after 1000 charge-discharge cycles.

Sources:

  • Shen, Z.-Y., Wu, J., Li, D.-X., Li, Z., Zhang, Y., Li, Y., ... & Xu, Y. (2025). Enhanced Breakdown Strength and Energy Storage Density of Mgo Modified (Bi 0.5 na 0.5 ) 0.6 (Ba 0.3 sr 0.7 ) 0.4 tio 3 Ceramics Fabricated By Spark Plasma Sintering. Ceramics International, 51(24), 42898-42906.
  • National Natural Science Foundation of China (NSFC)
  • Graduate Innovation Fund of Jiangxi Province
  • School of Materials Science and Engineering, Jingdezhen Ceram Univ.