INFLUENCE OF Pr6O11-DOPING ON THE CRYSTAL STRUCTURE AND ELECTRICAL PROPERTIES OF BNBT PIEZOELECTRIC CERAMICS

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dc.contributor.authorYotthuan, Surirat
dc.contributor.authorSawangboon, Nuttawan
dc.contributor.authorMeechoowas, Ekarat
dc.contributor.authorBongkarn, Theerachai
dc.contributor.authorVittayakorn, Naratip
dc.date.accessioned2026-08-06T10:50:00Z
dc.date.available2026-08-06T10:50:00Z
dc.date.issued2025-01-01
dc.description.abstractIn this work, a series of lead-free 0.97(Bi<inf>0.5</inf>Na<inf>0.5</inf>)TiO<inf>3-</inf>0.03BaTiO<inf>3-x</inf>Pr<inf>6</inf>O<inf>11</inf> (BNBT-xPr) piezoelectric materials with x=0, 0.1, 0.3, 0.5, and 0.7 wt.% were created by the solid-state combustion route, to enhance their electric properties. The investigation on the phase evolution, microstructure, and electrical behavior of the specimens were carried out. The powders and ceramics were calcined and sintered for two hours at 800℃ and 1180℃, correspondingly. All examples displayed a perfect perovskite lattice and no detectable impurity phase. XRD pattern examination for the ceramics disclosed the existence of rhombohedral and tetragonal phases in all examples. The rhombohedral phase was boosted by rising the doping levels, as established by the Rietveld refinement study. As the x content rose, the average grain size and measured density began to decrease from 0.90±0.10 to 0.73±0.07 μm and 6.13 to 6.05 g/cm<sup>3</sup>, correspondingly. It was noticed that Pr<inf>6</inf>O<inf>11</inf> doping, decreased dielectric properties. The remnant polarization (Pr) of the samples rises from 22.2 to 27.7 μC/cm<sup>2</sup> with x rises from 0 to 0.3 and then dropped. The coercive field (Ec) of the ceramics rises significantly when Pr<inf>6</inf>O<inf>11</inf> was incorporated. The BNBT lead-free ceramics doped with 0.3wt%Pr<inf>6</inf>O<inf>11</inf>, with a high Pr value, could be a promising candidate for memory applications to replace Pb-based ceramics.
dc.identifier.citationSuranaree Journal of Science and Technology, 32(1), 1-8, 2025
dc.identifier.doi10.55766/sujst9183
dc.identifier.issn0858849X
dc.identifier.other2-s2.0-105005994136
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/16672
dc.sourceSuranaree Journal of Science and Technology
dc.subjectBNBT
dc.subjectDielectric
dc.subjectPerovskite
dc.subjectPr6O11
dc.subjectSolid-state combustion
dc.titleINFLUENCE OF Pr6O11-DOPING ON THE CRYSTAL STRUCTURE AND ELECTRICAL PROPERTIES OF BNBT PIEZOELECTRIC CERAMICS
dc.typeArticle

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