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dc.contributor.authorSupalak Manothamen_US
dc.contributor.authorPharatree Jaitaen_US
dc.contributor.authorChamnan Randornen_US
dc.contributor.authorGobwute Rujijanagulen_US
dc.contributor.authorDavid P. Cannen_US
dc.date.accessioned2019-09-16T12:51:43Z-
dc.date.available2019-09-16T12:51:43Z-
dc.date.issued2019-11-05en_US
dc.identifier.issn09258388en_US
dc.identifier.other2-s2.0-85070631506en_US
dc.identifier.other10.1016/j.jallcom.2019.151655en_US
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85070631506&origin=inwarden_US
dc.identifier.urihttp://cmuir.cmu.ac.th/jspui/handle/6653943832/66658-
dc.description.abstract© 2019 Elsevier B.V. In this research, ceramics with a high electromechanical strain based on the composition (1-x)[0.97Bi0.5(Na0.84K0.16)0.5TiO3-0.03Ba(Ti0.99Nb0.01)O3]-xBiFeO3 or (1-x)[BNKT-0.03BNbT]-xBFO (with x = 0, 0.03, 0.05, 0.07, and 0.09 mol fraction) were investigated. All compositions were synthesized via a conventional solid-state mixed oxide method. The effects of the addition of BFO on the phase structure, dielectric, ferroelectric, and piezoelectric properties and electric field-induced strains behavior of BNKT-0.03BNbT ceramics were systematically studied in this work. X-ray diffraction (XRD) analysis revealed that all ceramics exhibited a pure perovskite structure. The coexistence of rhombohedral (R) and tetragonal (T) phases was observed for all compositions. The electric field-induced strain increased with increasing BFO content and attained a maximum value of Smax = 0.65% and d*33 = 1161 pm/V (@40 kV) for the composition x = 0.05 at room temperature (RT). The bipolar strain behavior exhibited minimal asymmetry and a low driving electric field. The composition also exhibited a high electrostrictive response (Q33 ∼ 0.039 m4/C2). In addition, the x = 0.09 composition showed excellent energy storage properties, with an energy storage density of 0.91 J/cm3 at 125 °C, high normalized energy storage density (∼0.14 μC/mm2), thermal stability (7% for 75-150 °C) and energy storage efficiency (η = 87% @125 °C). These results suggest that the (1-x)[BNKT-0.03BNbT]-xBFO ceramics are promising as lead-free piezoelectric material candidates, and are also suitable for both actuator and high temperature energy storage applications.en_US
dc.subjectEngineeringen_US
dc.subjectMaterials Scienceen_US
dc.titleExcellent electric field-induced strain with high electrostrictive and energy storage performance properties observed in lead-free Bi<inf>0.5</inf>(Na<inf>0.84</inf>K<inf>0.16</inf>)<inf>0.5</inf>TiO<inf>3</inf>-Ba(Nb<inf>0.01</inf>Ti<inf>0.99</inf>)O<inf>3</inf>-BiFeO<inf>3</inf> ceramicsen_US
dc.typeJournalen_US
article.title.sourcetitleJournal of Alloys and Compoundsen_US
article.volume808en_US
article.stream.affiliationsOregon State Universityen_US
article.stream.affiliationsChiang Mai Universityen_US
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