The piezoelectric, dielectric and ferroelectric properties of the (LiCe) co-substituted calcium bismuth niobate (CaBi2Nb2O9) were investigated. The piezoelectric properties of CaBi2Nb2O9 ceramics were significantly enhanced and the dielectric loss tan δ decreased. This makes poling using (LiCe) co-substitution easier. The ceramics (where □ represents A-site Ca2+ vacancies, possess a pure layered structure phase and no other phases can be found. The Ca0.88(LiCe)0.04□0.04Bi2Nb2O9 ceramics possess optimal piezoelectric properties, with piezoelectric coefficient (d33) and Curie temperature (Tc) found to be 13.3pC/N and 960C, respectively. The dielectric and piezoelectric properties of the (LiCe) co-substituted CaBi2Nb2O9 ceramics exhibit very stable temperature behaviours. This demonstrates that the CaBi2Nb2O9 ceramics were a promising candidate for ultrahigh temperature applications.

Effects of (LiCe) Co-Substitution on the Structural and Electrical Properties of CaBi2Nb2O9 Ceramics. X.X.Tian, S.B.Qu, H.L.Du, Y.Li, Z.Xu: Chinese Physics B, 2012, 21[3], 037701