[10a-N403-1~12] 9.1 Dielectrics, ferroelectrics

[10a-N403-12] Effects of MnO Addition to Anti-Ferroelectric NaNbO₃ – CaZrO₃ Ceramics

〇Hiroshi Maiwa¹, Atsushi Sakurai¹, Yugeng Liu¹ (1.Shonan Inst. Tech.)

Keywords:Antiferroelectrics, NaNbO3, Lead-free

0.96NaNbO₃ – 0.04CaZrO₃ ceramics were prepared by solid state reaction. The crystal structure, microstructure, and the dielectric and electromechanical properties are investigated. Lead free NaNbO₃-CaZrO₃ ceramics were fabricated. The addition of MnO improves the sinterability and dielectric properties. Superlattice peaks were observed from the 0.96NaNbO₃-0.04CaZrO₃ sintered at 1100-1350℃. Constrictions in P-E loops and rapid increases in S-E loops accompanying switching were observed in the 0.96NN and 0.04 CaZrO₃ plus 3mol% MnO sintered at 1250 ºC.