Polar Vortices in Relaxor Ferroelectric Ceramics for High-Efficiency Capacitive Energy Storage

Polar vortices are predominantly observed within the confined ferroelectric films and the ferroelectric/paraelectric superlattices. This raises the intriguing question of whether polar vortices can form within relaxor ferroelectric ceramics and subsequently contribute to their energy storage performances. Here, we incorporate 10 mol % CaSnO3 into the 0.7NaNbO3-0.3Sr0.7Bi0.2TiO3 matrix, yielding a coexistence of phases: 48.8% orthorhombic P21/ma, 49.1% tetragonal P4bm, and 2.1% tetragonal P42/mnm SnO2, which is confirmed by the combination of X-ray diffraction and transmission electron microscopy. The ceramic features a pronounced core–shell structure with the shell region rich in stripe nanoscale domains of…

• CU
  Chaohu University

  Awards: kj21kctd01, kj20zkjp02
• KR
  Key Research and Development Program of Zhejiang Province

  Award: 2023C01090