Low temperature sintering and enhanced piezoelectric properties of BiFeO3–BaTiO3 ceramics by homogeneous calcination

Kim, Kang San; Choi, Ye Rok; Chae, Ki Woong; Kim, Jeong Seog; Cheon, Chae Il

doi:10.1016/j.ceramint.2024.06.053

Ceramics International

2024

DOI: 10.1016/j.ceramint.2024.06.053

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Low temperature sintering and enhanced piezoelectric properties of BiFeO3–BaTiO3 ceramics by homogeneous calcination

Kang San Kim,

Ye Rok Choi,

Ki Woong Chae

et al.

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2024

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Cited by 2 publications

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Enhanced magnetoelectric response in Sc-doped BiFeO3-BaTiO3 Ceramics

Qi,

Xia,

Guo

et al. 2024

Ceramics International

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Enhanced magnetoelectric response in Sc-doped BiFeO3-BaTiO3 Ceramics

Qi,

Xia,

Guo

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Crystal Structures and Piezoelectric Properties of Quenched and Slowly-Cooled BiFeO3-BaTiO3 Ceramics

Go,

Kim,

Choi

et al. 2024

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The BiFeO3-BaTiO3 (BF-BT) ceramics were here prepared through the solid-state reaction of Bi2O3, Fe2O3 and nano-sized BT powders. The crystal structures and piezoelectric properties were investigated in both quenched (AQ) and slowly cooled (SC) 0.7BF-0.3BT ceramics. Prior work has shown that rhombohedral and pseudo-cubic phases coexist in 0.7BF-0.3BT ceramics. In this work, the crystal structure of the pseudo-cubic phase was refined as a non-polar orthorhombic Pbnm phase in the SC sample and as a polar orthorhombic Pmc21 phase in the AQ sample. In addition to a sharp dielectric peak at about 620 °C, corresponding to the Curie temperature of the rhombohedral phase, a broad dielectric peak with strong frequency dispersion and a sharp frequency-independent dielectric peak were observed at around 500 °C in the SC and AQ samples, respectively. We determine that the dielectric anomalies around 500 °C were caused by a relaxor phase transition of the non-polar orthorhombic phase in the SC sample and a ferroelectric–paraelectric phase transition of the polar orthorhombic phase in the AQ sample. The AQ sample showed better ferroelectric and piezoelectric properties than the SC sample. The 0.7BF-0.3BT ceramic slowly cooled in a nitrogen atmosphere showed a well-saturated P-E curve and a similar temperature-dependent dielectric constant as the AQ sample. Our results indicate that large concentrations of oxygen vacancies produce a more distorted polar orthorhombic phase and better piezoelectric properties in the AQ sample than in the SC sample.

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Low temperature sintering and enhanced piezoelectric properties of BiFeO3–BaTiO3 ceramics by homogeneous calcination

Cited by 2 publications

References 36 publications

Enhanced magnetoelectric response in Sc-doped BiFeO3-BaTiO3 Ceramics

Enhanced magnetoelectric response in Sc-doped BiFeO3-BaTiO3 Ceramics

Crystal Structures and Piezoelectric Properties of Quenched and Slowly-Cooled BiFeO3-BaTiO3 Ceramics

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