Abstract
CeO2 and Y2O3 were co-doped to (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 ceramics and sintered by conventional solid-state reaction process to form x wt.% CeO2-y wt.% Y2O3 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (CexYy-BCZT) ceramics. The effects of different contents of CeO2-Y2O3 dopants to the (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3 composition were analyzed by studying the phase, surface microstructure, piezoelectric and ferroelectric properties of BCZT ceramics. In this study, we have shown that co-doping a small amount of CeO2 and Y2O3 will not change the phase structure of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 ceramics. However, the proper introduction of CeO2 and Y2O3 can improve the piezoelectric constant and electromechanical coupling coefficient of BCZT ceramic samples. Moreover, these dopants can promote the grain growth process in (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3 ceramics. C0.04Y0.02 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 ceramic has the best piezoelectric properties compared with other composition, the results are as follows: Relative density = 96.9%, Kp = 0.583, and d33 = 678 pC/N, V = 8.9 V. It means that this Ce0.04Y0.02 doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 ceramic is a desired material in the application of lead-free ceramics.
Highlights
In the past few decades, lead zirconate titanate (PZT) ceramics have been widely employed in piezoelectric device applications due to their high piezoelectric charge coefficient (d33 = 220–590 pC/N), electromechanical coupling coefficient, and high Curie temperature
In order to achieve the goal of eco-friendly and sustainable development for piezoelectric materials, the new development of lead-free ceramics and PVDF piezoelectric film with excellent performance is essential for human beings [3,4,5,6,7,8]
In order to study the influence of different sintering temperatures on Ce0.04Y0.02-BCZT ceramics, XRD measurements were performed at the sintering temperature between 1450 and 1550 ◦C
Summary
In the past few decades, lead zirconate titanate (PZT) ceramics have been widely employed in piezoelectric device applications due to their high piezoelectric charge coefficient (d33 = 220–590 pC/N), electromechanical coupling coefficient (kp = 0.5–0.7), and high Curie temperature These attractive PZT ceramics have some kinds of drawbacks in volatile and toxic properties [1,2]. To overcome toxic and related environmental problems, many attempts have been made Among these attempts, research on lead-free materials has been increased. PVDF piezoelectric film has high chemical stability, soft texture, and lightweight merits [9]
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