High‐Entropy Enhanced Microwave Attenuation in Titanate Perovskites

Abstract High‐entropy oxides (HEOs), which incorporate multiple‐principal cations into single‐phase crystals and interact with diverse metal ions, extend the border for available compositions and unprecedented properties. Herein, a high‐entropy‐stabilized (Ca 0.2 Sr 0.2 Ba 0.2 La 0.2 Pb 0.2 )TiO 3 perovskite is reported, and the effective absorption bandwidth (90% absorption) improves almost two times than that of BaTiO 3 . The results demonstrate that the regulation of entropy configuration can yield significant grain boundaries, oxygen defects, and an ultradense distorted lattice. These characteristics give rise to strong interfacial and defect‐induced polarizations, thus synergistically contributing to the…

• NN
  National Natural Science Foundation of China

  Awards: 52231007, 11727807, 22088101, 52271167, 51725101
• PO
  Program of Shanghai Academic Research Leader

  Award: 19XD1400400