Dielectric and ferroelectric properties evolution of ($1-x$)(Bi$_{0.5}$Na$_{0.5}$TiO$_3$)–$x$K$_{0.5}$Na$_{0.5}$NbO$_3$ piezoceramics
A PRADO F RUBIO-MARCOS L RAMAJO M S CASTRO
Click here to view fulltext PDF
Permanent link:
https://www.ias.ac.in/article/fulltext/boms/043/0282
In this work, piezoceramics of ($1-x$)(Bi$_{0.5}$Na$_{0.5}$)TiO$_3$$–x$(K$_{0.5}$Na$_{0.5}$)NbO$_3$, ($1-x$)BNT$–x$KNN, in the compositional range 0.00 ≤ $x$ ≤ 0.07, were prepared by a mechanochemically activated solid-state method. The structural phase formation and microstructural, dielectric, and ferroelectric properties were studied. Although changes, in symmetry of the perovskite structure, were not detected with the composition (i.e., from a perspective of its intrinsic properties), the microstructural evolution was strongly dependent on the content of the KNN phase (i.e., based on its extrinsic properties). Specifically, KNN favoured the formation of a microstructure with cubic grains, typical morphology of the alkalineniobate ceramics. After KNN addition, both the maximum permittivity temperature and the long-range to short-range ordered transition temperature were reduced. Additionally, ferroelectric loops and strain deformation curves also reflect the long-range to short-range order evolution with KNN addition and temperature.
A PRADO1 F RUBIO-MARCOS2 3 L RAMAJO1 M S CASTRO1
Volume 43, 2020
All articles
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
Click here for Editorial Note on CAP Mode
© 2021-2022 Indian Academy of Sciences, Bengaluru.