Scholarlink

<p>High-power pulsed systems demand dielectric capacitors with high energy density and efficiency. Although perovskite ceramics dominate this field, simultaneously achieving high performance and fatigue endurance remains a significant challenge. Our study addresses this aim by incorporating a Ba<sub>1-x</sub>Sr<sub>x</sub>TiO<sub>3</sub> second phase into tungsten bronze-type Ba<sub>1-x</sub>Sr<sub>x</sub>Nb<sub>2-y</sub>Ta<sub>y</sub>O<sub>6</sub> matrix, followed by chemical coating with a SiO₂ layer. The prepared ceramics achieve an energy density of 21.1 J/cm³ with an efficiency of 84.5%. Furthermore, by combining a rational multilayer ceramic capacitor design with the thickness effect, an energy density of 23.2 ± 1.2 J/cm³ and an improved efficiency of 92.8 ± 0.4% are attained, representing a record energy density for tungsten bronze-based ceramics and capacitors. The dual-core-shell structure and compositional gradients induce lattice mismatch, boosting polarization and breakdown strength. The fabricated devices also demonstrate remarkable stability under varying frequency, temperature, and fatigue cycling conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhanced energy storage in tungsten bronze-based ferroelectrics and MLCCs via a multi-coating engineering

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月20日

查看全文
  • Limin Guo,
  • Jiaming Liu,
  • Menghan Li,
  • Ying Jiang,
  • Weichen Zhang,
  • Kezhen Hui,
  • Jinsong Cui,
  • Xu Cheng,
  • Jinghui Huang,
  • Jianchun Xu,
  • Yunjian Guo,
  • Ke Bi,
  • Peiyao Zhao,
  • Yongle Wu,
  • Xiaohui Wang

摘要

High-power pulsed systems demand dielectric capacitors with high energy density and efficiency. Although perovskite ceramics dominate this field, simultaneously achieving high performance and fatigue endurance remains a significant challenge. Our study addresses this aim by incorporating a Ba1-xSrxTiO3 second phase into tungsten bronze-type Ba1-xSrxNb2-yTayO6 matrix, followed by chemical coating with a SiO₂ layer. The prepared ceramics achieve an energy density of 21.1 J/cm³ with an efficiency of 84.5%. Furthermore, by combining a rational multilayer ceramic capacitor design with the thickness effect, an energy density of 23.2 ± 1.2 J/cm³ and an improved efficiency of 92.8 ± 0.4% are attained, representing a record energy density for tungsten bronze-based ceramics and capacitors. The dual-core-shell structure and compositional gradients induce lattice mismatch, boosting polarization and breakdown strength. The fabricated devices also demonstrate remarkable stability under varying frequency, temperature, and fatigue cycling conditions.