High piezoelectric activity in lead-free BaTiO3-BaZrO3-CaTiO3 ceramics with near polymorphic phase boundary

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dc.contributor.authorSutapun, Manoon
dc.contributor.authorVittayakorn, Naratip
dc.date.accessioned2026-08-06T10:23:51Z
dc.date.available2026-08-06T10:23:51Z
dc.date.issued2019-01-02
dc.description.abstractLead-free 0.88BaTiO<inf>3</inf>–(0.12-x)BaZrO<inf>3</inf>–xCaTiO<inf>3</inf> (BT-BZ-xCT) ceramics were fabricated via solid state reaction. The effect of CaTiO<inf>3</inf> content on crystal structure, phase transition, and electrical properties was investigated systematically. The crystal structure and phase transition of ceramics were characterized by X-ray diffraction (XRD), Raman spectra and dielectric measurement. Results show that ceramic in the composition, x = 0.02, exhibits a rhombohedral structure. Ceramics with increasing CT content transformed from a rhombohedral to orthorhombic structure in the composition, x = 0.04, and eventually became a tetragonal structure at the composition, x ≥ 0.08. The polymorphic phase boundary (PPB) was observed at the composition, x = 0.06, with coexistence of orthorhombic and tetragonal phases showing at almost room temperature. This PPB composition exhibited a high piezoelectric response (d<inf>33</inf>*) of 1,150 pm/V at 10 kV/cm as an electric field was applied. These results indicate that the materials studied have potential as candidates for lead-free piezoelectric ceramics.
dc.identifier.citationIntegrated Ferroelectrics, 195(1), 166-177, 2019
dc.identifier.doi10.1080/10584587.2019.1570030
dc.identifier.issn10584587
dc.identifier.other2-s2.0-85065498042
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/9671
dc.sourceIntegrated Ferroelectrics
dc.subjectBaTiO3
dc.subjectBaZrO3
dc.subjectCaTiO3
dc.subjectLead-free piezoelectric
dc.subjectPolymorphic phase boundary
dc.titleHigh piezoelectric activity in lead-free BaTiO3-BaZrO3-CaTiO3 ceramics with near polymorphic phase boundary
dc.typeArticle

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