Strain‐Induced Structural Phase Transition and its Effect on Piezoelectric Properties of (BZT‐BCT)‐(CeO₂) Ceramics

Abstract

A strain‐induced structural phase transition and its subsequent effect on the piezoelectric properties of BZT‐BCT–x CeO2 (x = 0–0.1 wt%) ceramics have been reported in this manuscript. BZT‐BCT–x wt% CeO2 lead‐free piezoceramics were successfully been prepared using sol–gel method. X‐ray diffraction spectra of BZT‐BCT–x wt% CeO2 (x = 0–0.10 wt%) ceramics showed a purely single‐phase perovskite structure and a change in crystal structure between tetragonal and rhombohedral phases with increasing CeO2 content. The strain‐induced structural phase transition has resulted in excellent piezoelectric properties, d33 = 673 pC/N, kp ~ 56%, and Tc = 110°C for BZT‐BCT–0.08 wt% CeO2 ceramics. Greatly improved temperature stability of the piezoelectric properties has been observed over a temperature range between 20°C and 90°C. The ferroelectric–paraelectric transition temperature, Tc obtained in this study is 17°C higher than those reported earlier.

Electromechanical properties of Ce-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

“…The resulting A-site vacancies promote diffusion, as previously reported in other perovskite systems [34,35]. This is in agreement with previous results for Ce-doped BT [36] and Ce-doped BCZT [37]. Issa et al [38] attributed the variations in the density of Ce-doped BT to the structural changes in the lattice.…”

“…In order to surmount this problem, a number of additives have been considered, among which CuO [21] and Bi 2 O 3 [22] were used to densify and lower the sintering temperature of BCZT ceramics. In addition, CeO 2 has been considered for lowering the sintering temperature and improving the small signal piezoelectric coefficients of BCZT [23][24][25], but no comprehensive studies of large signal piezoelectric properties, which are crucial for actuator applications, were reported. Since Ce can exhibit different valence states, either 3+ or 4+, it can enter both A-and B-sites of the perovskite BCZT structure.…”

Highly Reducible Nanostructured CeO2 for CO Oxidation

“…Ceria (CeO 2 ) is a significant rare earth oxide and has widespread applications. It can be used in the fields of luminescent materials [1], gas sensors [2], electronic ceramics [3], biology, medical science [4,5] and so on. In the field of catalysis, CeO 2 can be used as catalysts or non-inert support for heterogeneous catalysts [6][7][8], acting as an oxygen buffer through a fast Ce 3+ /Ce 4+ cycle involving the participation of lattice oxygen.…”

Dielectric, Ferroelectric, Energy Storage, and Pyroelectric Properties of Mn-Doped (Pb0.93La0.07)(Zr0.82Ti0.18)O3 Anti-Ferroelectric Ceramics

“…It is clear that P max increases with Mn-doping and was found to be the highest for Mn = 0.2% doped PLZT AFE ceramics, which can be attributed to the improved microstructure of the PLZT AFE ceramics. 37) Fig. 5(b) shows the maximum field (E max ) applied to the Mn-doped PLZT AFE ceramics.…”