Structure, dielectric, and piezoelectric properties of Ba0.87Ca0.13 (Ti0.9Zr0.1) (1–x) (Zn1/3Nb2/3)x O3 ceramics

Manel Ben Abdessalem , Abdelhedi Aydi , Zina Sassi (1) , L. Seveyrat (1) , Veronique Perrin , Najmeddine Abdelmoula , Hamadi Khemakhem , Laurent Lebrun

1 LGEF - Laboratoire de Génie Electrique et Ferroélectricité

We have studied the effects of Zn and Nb substitutions on dielectric, ferroelectric, and piezoelectric properties of Ba0.87Ca0.13(Ti0.9Zr0.1)(1−x)(Zn1/3Nb2/3)xO3 ceramics. X-ray diffraction (XRD) results display that morphotropic boundary occurs from tetragonal to orthorhombic region for x = 0; 0.005; 0.01 and polymorphic phase transitions from tetragonal to orthorhombic and rhombohedral regions for x = 0.02. The evolution of the Raman spectra demonstrates the introduction of a disorder in this composition, which promotes ferroelectric relaxor behaviors. Ferroelectricity is confirmed by hysteresis investigation. A piezoelectric coefficient of d33 = 205 pC N−1 and a high planar electromechanical coupling factor of kp = 47% are reported for x = 0.1. The ceramics for x = 0.01 also depicts uniform microstructure that contributes to the important electrical properties. These results indicate that this Ba0.87Ca0.13(Ti0.9Zr0.1)(1−x)(Zn1/3Nb2/3)xO3 system with optimal composition is a promising lead-free piezoelectric material.

Domaines: Matériaux; Polymères; Energie électrique; Micro et nanotechnologies/Microélectronique

Manel Ben Abdessalem, Abdelhedi Aydi, Zina Sassi, L. Seveyrat, Veronique Perrin, et al.. Structure, dielectric, and piezoelectric properties of Ba0.87Ca0.13 (Ti0.9Zr0.1) (1–x) (Zn1/3Nb2/3)x O3 ceramics. Applied physics. A, Materials science & processing, 2021, 127 (2), pp.80. ⟨10.1007/s00339-020-04230-w⟩. ⟨hal-03565819⟩