CaTiO3 induced ferroelectric phase coexistence and low temperature dielectric relaxation in BaTiO3–BaZrO3 ceramics

Simple item page
dc.contributor.authorSutapun, Manoon
dc.contributor.authorCharoonsuk, Thitirat
dc.contributor.authorKolodiazhnyi, Taras
dc.contributor.authorVittayakorn, Naratip
dc.date.accessioned2026-08-06T10:19:51Z
dc.date.available2026-08-06T10:19:51Z
dc.date.issued2018-05-01
dc.description.abstractThe series of 0.86BaTiO<inf>3</inf>–(0.14−x)BaZrO<inf>3</inf>–xCaTiO<inf>3</inf> (abbreviated as BT–BZ–xCT) ceramics with 0.03 ≤ x ≤ 0.11 were studied to obtain high piezoelectric properties. Rietveld refinement analysis indicated that the BT–BZ–CT compositions follow a gradual rhombohedral (R) → orthorhombic (O) + R → O + tetragonal (T) → T phase transformation with increasing x. Clear evidence of the series of ferroelectric phase transitions was also found in the dielectric results. The R-O and O-T transition temperature shifted close to ambient temperature, while the Curie temperature slightly increased with increasing x. In addition to the dielectric loss peaks associated with the structural phase transitions, a broad low-temperature dielectric loss peak was detected in the R phase at T = 90-150 K. This dielectric relaxation was attributed to the domain wall freezing and fits well to the Vogel-Fulcher model with activation energy E<inf>a</inf> ≈ 60-300 meV and freezing temperature T<inf>VF</inf> ≈ 75-140 K. High piezoelectric strain coefficient (d<inf>33</inf>*) of about 1030 pm/V at 10 kV was achieved at x = 0.07, and a high Curie temperature (T<inf>C</inf>) was maintained at about 375 K.
dc.identifier.citationJournal of the American Ceramic Society, 101(5), 1957-1966, 2018
dc.identifier.doi10.1111/jace.15351
dc.identifier.issn00027820
dc.identifier.other2-s2.0-85036514414
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/8549
dc.sourceJournal of the American Ceramic Society
dc.subjectBaTiO3
dc.subjectBaZrO3
dc.subjectferroelectric
dc.subjectlead-free piezoelectric
dc.subjectphase transition
dc.titleCaTiO3 induced ferroelectric phase coexistence and low temperature dielectric relaxation in BaTiO3–BaZrO3 ceramics
dc.typeArticle

Files

Collections

Research