0.98[(Na(1–x)/2Smx/2Nb0.3TiO3)] + 0.02MnO2 Lead-free ceramic system sesign; an antiferroelectrics with improved relaxation behavior
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Date
2023
Authors
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Publisher
Elsevier BV
Abstract
The sodium niobate-based ceramics 0.98[(Na(1−x)/2Smx/2Nb0.3TiO3)] + 0.02MnO2 acronymed NSmNT of different compositions (x = 0.05, 0.1, 0.11, 0.12, and 0.13) were prepared via solid-state reaction method. The prepared samples were characterized by XRD to study the phase structure of the designed systems, SEM to study the microstructure properties of the NSmNT ceramics. In addition to that LCR meter was used to measure the sample temperature-dependent dielectric permittivity, dielectric loss, and systems impedance. The results showed an increment in the dielectric breakdown strength (DBS) with increasing x content from 100 kVcm–1 to 450 kVcm–1. Similarly, the high recoverable energy density (Wrec) of 5.61 J cm–3 was obtained for x = 0.11 symbolized (NSmNT2) with an exquisite efficiency of 88%. The study also analyzed the complex impedance of the NSmNT2 ceramics system to clearly understand the dielectric behavior of the system in question. A general view of things considers the NSmNT2 ceramic system to be a reliable system for pulsed power applications.
Description
Abstract. Full-text available at https://doi.org/10.1016/j.jallcom.2023.170740
Keywords
Sodium niobate-based ceramics, NSmNT ceramics, Solid-state reaction method, XRD analysis, SEM microstructure, Dielectric permittivity, Dielectric loss, System impedance, Dielectric breakdown strength, Recoverable energy density, Efficiency, Complex impedance analysis, Pulsed power applications.
Citation
Emmanuel, M. (2023). 0.98 [(Na (1–x)/2Smx/2Nb0. 3TiO3)]+ 0.02 MnO2 Lead-free ceramic system design; an antiferroelectrics with improved relaxation behavior. Journal of Alloys and Compounds, 960, 170740.