Scholarlink

<p>Lead-free dielectric capacitors commonly rely on chemical disorder design to regulate relaxor behavior. In order to avoid the polarization sacrifice caused by non-ferroactive cations while maintaining a strong enough local random field, an oxygen octahedron tilt framework design strategy is introduced in this work. Based on the Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-AgNbO<sub>3</sub> system with high-content ferroactive cations, slush-like heterogeneous polar nanoregions enable a large polarization response. Meanwhile, besides the local random electric and elastic fields caused by the heterovalence and different cation radii, the additional local random elastic field caused by the randomly disordered distribution of the BO<sub>6</sub> tilt mode and angle not only slows polarization reorientation and growth but also provides a restoring force to reset polarization during charging, enabling the slim hysteresis loop with delayed polarization saturation as well as excellent energy storage properties. This work provides a feasible avenue for high-performance lead-free relaxors with low tolerance factor.</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

Oxygen octahedron framework design for large energy capacitive relaxors

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月16日

查看全文
  • Yuan Liu,
  • Hao Li,
  • Jie Wu,
  • Weisan Fang,
  • Xingshuai Ma,
  • Huifen Yu,
  • Liang Chen,
  • Shiqing Deng,
  • Yu Chen,
  • He Qi,
  • Jun Chen

摘要

Lead-free dielectric capacitors commonly rely on chemical disorder design to regulate relaxor behavior. In order to avoid the polarization sacrifice caused by non-ferroactive cations while maintaining a strong enough local random field, an oxygen octahedron tilt framework design strategy is introduced in this work. Based on the Bi0.5Na0.5TiO3-AgNbO3 system with high-content ferroactive cations, slush-like heterogeneous polar nanoregions enable a large polarization response. Meanwhile, besides the local random electric and elastic fields caused by the heterovalence and different cation radii, the additional local random elastic field caused by the randomly disordered distribution of the BO6 tilt mode and angle not only slows polarization reorientation and growth but also provides a restoring force to reset polarization during charging, enabling the slim hysteresis loop with delayed polarization saturation as well as excellent energy storage properties. This work provides a feasible avenue for high-performance lead-free relaxors with low tolerance factor.