Improvements in piezoelectric and energy harvesting properties with a slight change in depolarization temperature in modified BNKT ceramics by a simple technique

Abstract

In this study, we demonstrated a simple technique (thermal annealing) to enhance the piezoelectricity with a very slight decrease in Td by ∼2 °C for a modified BNKT ceramic (BNKT doped with ZnO).

Microwave-Based Fast and Efficient Synthesis of K0.5Na0.5NbO3 (KNN) Ceramics and Its Performance Evaluation

“…The enhancement of d 33 values in the present study is associated with several factors, including improvements in ferroelectric properties (enhanced P r , P m , and reduced E c ), grain size influence, MPB, and a concurrent improvement in density. The observed trends in d 33 values align with those observed in density values (see Tables and ) …”

“…The KNN sample processed for 40 min using microwave heating displayed the highest FoM value at 10.45 pm 2 /N (as shown in Figure b and Table ). This enhancement can be attributed to the improvements in the d 33 and g 33 values for this specific sample . In comparison to earlier research findings on different lead-free piezoelectric ceramics, the g 33 and FoM values obtained in this study are notably high.…”

“…The observed trends in d 33 values align with those observed in density values (see Tables 1 and 5). 37 There has been an increasing focus on the application of piezoelectric materials for the development of energy harvesting technologies. The investigation into the energy harvesting attributes of ceramics focused on the piezoelectric voltage constant (g 33 ) in this study, which is a crucial element in energy harvesting applications.…”

Enhanced Energy Storage Performance and Efficiency in Bi0.5(Na0.8K0.2)0.5TiO3-Bi0.2Sr0.7TiO3 Relaxor Ferroelectric Ceramics via Domain Engineering

“…The enhancement in lattice parameters can be attributed to the ionic radius of Sr 2+ (1.44 Å), which is larger than that of Bi 3+ (1.36 Å), Na + (1.39 Å), and K + (1.38 Å), respectively, at the A-site [52][53][54]. (iii) the modes between 440 and 700 cm −1 correspond to the vibrations of BO6 (TiO6)-octahedra; and (iv) the modes above 700 cm −1 are related to the A1 and E (longitudinal optical) overlapping modes [55]. The modes appearing at 124-172 cm −1 and 768 cm −1 are shifted to the higher wavenumbers of 128-189 cm −1 and 779 cm −1 with BST, associated with the A-site and A1 + E vibrations caused by A-site disorder.…”

“…The modes appearing at 124-172 cm −1 and 768 cm −1 are shifted to the higher wavenumbers of 128-189 cm −1 and 779 cm −1 with BST, associated with the A-site and A1 + E vibrations caused by A-site disorder. Such a disorder is induced by the (iii) the modes between 440 and 700 cm −1 correspond to the vibrations of BO 6 (TiO 6 )-octahedra; and (iv) the modes above 700 cm −1 are related to the A1 and E (longitudinal optical) overlapping modes [55]. The modes appearing at 124-172 cm −1 and 768 cm −1 are shifted to the higher wavenumbers of 128-189 cm −1 and 779 cm −1 with BST, associated with the A-site and A1 + E vibrations caused by A-site disorder.…”