English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The structural, dielectric and ferroelectric properties of lead-free(Na0.5-xKxBi0.5-xLax)TiO3 powders synthesized by sol-gel self-combustion methodwere investigated. Rietveld refinement of Synchrotron x-ray diffraction dataconfirms pure single phase rhombohedral crystal structure with R3c space groupfor all the compositions and anti-phase octahedral tilting angle decreased withincrease in composition x. Homogeneity and elemental proportions were confirmedby Energy dispersive x-ray spectrometry. The temperature-dependent dielectricstudy has shown two diffuse type of dielectric anomaly for all the samples, dueto A-site disorder in the lattice, which has been assigned to two-hastransitions: ferroelectric to anti-ferroelectric and anti-ferroelectric to theparaelectric phase transition. The transition temperature of these phasetransitions is found to decrease as a function of composition. Thermalstability range of dielectric constant increases from ~100C to 220C as afunction of composition. Stable dielectric constant first increases, from 155710 % for parent compound, with the composition, highest for 6 % compositionwith emid ~ 2508 10 % for the temperature range ~180 C to 340C and after thatdecreases to 1608 10 % for 12 % but remain higher than the parent compoundNa0.5Bi0.5TiO3. Ferroelectric measurements have shown monotonously decreasingcoercive field as a function of the composition due to a decrease in grainsize, confirmed by microstructural studies using Field Emission ScanningElectron Microscope. Exponential increases in the energy storage efficiencyfrom ~ 17 % to 87 % as a function of composition have also observed. Thesetypes of materials, with stable high dielectric constant and low tan delta,have a vast scope in the field of the thermally stable dielectric constantmaterials and energy storage applications.

Structural, dielectric and ferroelectric studies of thermally stable and efficient energy storage ceramic material: (Na0.5-xKxBi0.5-xLax)TiO3