Piezoelectricity in excess of 30 pC N−1 with a high Curie temperature of 950 °C in strongly textured CaBi2Nb2O9 ceramics

The Na/Sm co-doped CaBi 2 Nb 2 O 9 textured ceramics with a high texture degree of 95–98% were successfully prepared by improved grain growth method, achieving the highest piezoelectric coefficient ( d 33 > 30 pC N −1 ) in the CaBi 2 Nb 2 O 9 systems.