Structural, dielectric and ferroelectric properties of Cu2+- and Cu2+/Bi3+-doped BCZT lead-free ceramics: a comparative study

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dc.contributor.authorKumari, Sapna
dc.contributor.authorKumar, Amit
dc.contributor.authorKumar, V.
dc.contributor.authorDubey, S.K.
dc.contributor.authorGoyal, P.K.
dc.contributor.authorKumar, Suresh
dc.contributor.authorSharma, A.L.
dc.contributor.authorArya, Anil
dc.date.accessioned2024-01-21T10:42:30Z
dc.date.accessioned2024-08-13T12:44:33Z
dc.date.available2024-01-21T10:42:30Z
dc.date.available2024-08-13T12:44:33Z
dc.date.issued2021-05-29T00:00:00
dc.description.abstractPerovskite-type Ba0.98Ca0.02Zr0.02Ti0.98O3 (BCZT), Ba0.98Ca0.02Zr0.02Ti0.976Cu0.008O3 (BCZTC) and Ba0.9725Bi0.005Ca0.02Zr0.02Ti0.976Cu0.008O3 (BCZTCB) lead-free ceramics were synthesised via solid-state reaction method at a sintering temperature of 1380��C. Effects of CuO and Bi2O3/CuO doping on structural, microstructural, dielectric and ferroelectric properties were investigated systematically. X-ray diffraction technique confirmed the existence of pure perovskite phase with the tetragonal structure in pure and in the doped BCZT ceramics at room temperature. The dielectric analysis demonstrated two anomalies around 24��C and 126��C for BCZT, which were identified as orthorhombic to tetragonal (TO-T) and tetragonal to cubic (TC) phase transition temperature, respectively. The TO-T temperature shifted to below 16��C, while the TC increased to 132��C for the BCZTCB sample. The physical mechanisms of the conduction processes were investigated through impedance spectroscopy, and the values of resistance, conductivity and activation energies associated with the grain and grain boundaries were evaluated. The activation energy was determined to be higher for doped samples than for pure BCZT. Further, the dopant-dependent ferroelectric nature of the ceramic samples was evidenced by the analysis of characteristic hysteresis loop, and a value of remnant polarization (Pr = 4.59�?C/cm2) was obtained for the BCZTCB ceramic sample. Furthermore, the d33 value, which was 54 pC/N for pure BCZT, was determined to be 140 pC/N and 64 pC/N for BCZTC and BCZTCB, respectively. � 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.en_US
dc.identifier.doi10.1007/s10854-021-06252-3
dc.identifier.issn9574522
dc.identifier.urihttp://10.2.3.109/handle/32116/3657
dc.identifier.urlhttps://link.springer.com/10.1007/s10854-021-06252-3
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.subjectBarium zirconateen_US
dc.subjectBismuth compoundsen_US
dc.subjectCopper oxidesen_US
dc.subjectFerroelectricityen_US
dc.subjectGrain boundariesen_US
dc.subjectPerovskiteen_US
dc.subjectSinteringen_US
dc.subjectSolid state reactionsen_US
dc.subjectCeramic samplesen_US
dc.subjectComparatives studiesen_US
dc.subjectCuO dopingen_US
dc.subjectDielectric and ferroelectric propertiesen_US
dc.subjectLead free ceramicsen_US
dc.subjectMicro-structural propertiesen_US
dc.subjectPerovskite typeen_US
dc.subjectSintering temperaturesen_US
dc.subjectSolid state reaction methoden_US
dc.subjectSynthesiseden_US
dc.subjectActivation energyen_US
dc.titleStructural, dielectric and ferroelectric properties of Cu2+- and Cu2+/Bi3+-doped BCZT lead-free ceramics: a comparative studyen_US
dc.title.journalJournal of Materials Science: Materials in Electronicsen_US
dc.typeArticleen_US
dc.type.accesstypeOpen Accessen_US

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