What question did this study set out to answer?

Investigate the phase symmetry, structural transitions, and dielectric properties of barium titanate–bismuth scandate solid solutions across varying composition ratios.

November 21, 2008Journal of the American Ceramic SocietyOpen Access

Weakly Coupled Relaxor Behavior of BaTiO 3 –BiScO 3 Ceramics

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Authors

HOHideki OgiharaPennsylvania State University CRClive A. RandallUniversity of Essex STSusan Trolier‐McKinstryPennsylvania State University

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Implication

Experimental analysis demonstrates weakly coupled relaxor behavior in barium titanate–bismuth scandate ceramics, indicating restricted long-range dipole ordering across nanopolar regions.

Key Points

Investigate the phase symmetry, structural transitions, and dielectric properties of barium titanate–bismuth scandate solid solutions across varying composition ratios.
Synthesized (1−x)BaTiO3–xBiScO3 ceramic compositions across the range of x = 0 to 0.5.
Characterized room-temperature phase structure, solubility limits, and temperature-dependent dielectric properties.
Modeled frequency-dependent relaxation behavior using the Vogel–Fulcher equation to extract activation energies, attempt frequencies, and freezing temperatures.
Determined the BiScO3 solubility limit in the BaTiO3 perovskite lattice at x ≈ 0.4, with a structural shift from tetragonal to pseudo-cubic phase at x = 0.05–0.075.
Identified a transition from normal ferroelectricity to highly dispersive relaxor behavior at 10 to 40 mol% BiScO3, yielding high relative permittivity and low capacitance variation across temperature.
Calculated Vogel–Fulcher activation energies of 0.2–0.3 eV, an attempt frequency of 10^13 Hz, and freezing temperatures ranging from −177°C to −93°C.

Cite This Study

Ogihara et al. (2008) studied this question.

synapsesocial.com/papers/69d8f4802c87b79b92d185cc https://doi.org/10.1111/j.1551-2916.2008.02798.x

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Implication

Experimental analysis demonstrates weakly coupled relaxor behavior in barium titanate–bismuth scandate ceramics, indicating restricted long-range dipole ordering across nanopolar regions.

Weakly Coupled Relaxor Behavior of BaTiO 3 –BiScO 3 Ceramics

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Cite This Study

Weakly Coupled Relaxor Behavior of BaTiO 3 –BiScO 3 Ceramics

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Cite This Study

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