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Colossal permittivity in high-entropy CaTiO3 ceramics by chemical bonding engineering

Author

Listed:
  • Jinghan Cai

    (Tsinghua University)

  • Shun Lan

    (Tsinghua University)

  • Bin Wei

    (Tsinghua University
    Henan Polytechnic University)

  • Junlei Qi

    (Tsinghua University)

  • Ce-Wen Nan

    (Tsinghua University)

  • Yuan-Hua Lin

    (Tsinghua University)

Abstract

Dielectrics with high permittivity, low dielectric loss, and good temperature stability are crucial for electronic components to meet the ever-increasing application demands. However, challenges remain in further optimizing dielectric properties due to the correlation between these parameters. Here, we propose a chemical bonding engineering strategy in high-entropy CaTiO3 ceramics and realize colossal permittivity with low loss and excellent stability. Our results reveal that the high-concentration oxygen vacancy ( $${{{\rm{V}}}}_{{{\rm{O}}}}^{\cdot \cdot }$$ V O ⋅ ⋅ )-related defects and the decreased activation energy of grain/grain boundary led to a colossal permittivity dielectric behavior, which should be ascribed to the weakened chemical bonding and the reduced formation energy of defects confirmed by our first-principles calculation. Consequently, in the high-entropy CaTiO3 ceramic, a permittivity of 2.37 × 105, low loss of 0.005, and good temperature stability (

Suggested Citation

  • Jinghan Cai & Shun Lan & Bin Wei & Junlei Qi & Ce-Wen Nan & Yuan-Hua Lin, 2025. "Colossal permittivity in high-entropy CaTiO3 ceramics by chemical bonding engineering," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59226-y
    DOI: 10.1038/s41467-025-59226-y
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