Relaxor Behavior and Dielectric Properties of Bi(Zn2/3Nb1/3)O3-Modified BaTiO3 Ceramics

Chen, Xiuli; Chen, Jie; Huang, Guisheng; Ma, Dandan; Fang, Liang; Zhou, Huanfu

doi:10.1007/s11664-015-4023-y

Cited by 27 publications

(17 citation statements)

References 41 publications

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“…Interestingly, both the parameters decrease drastically when the temperature is increased from −53°C to −33°C, followed by more moderate decrease with further increase in temperature. The temperature dependence of the c/a ratio for the current composition is similar in nature to the composition dependence observed earlier by Ogihara et al and Chen et al for (1‐ x ) BaTiO 3 ‐ x Bi Me O 3 . A slight displacement of the atomic positions of A and B sites cations along z axis was also observed in the tetragonal phase with P4mm space group.…”

Section: Resultssupporting

confidence: 88%

Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

et al. 2019

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Weakly coupled relaxors based on compositions (1‐x) BaTiO3‐xBiMeO3, where Me is a metal ion, have attracted attention as potential candidates for high‐temperature high‐energy density capacitors. However, the necessary Bi content is typically high with x = 0.3‐0.4. In order to reduce problems associated with compatibility for base metal electrodes and due to additional problems due to Bi volatility, it is desirable to lower the Bi content in the overall composition for these materials. Here, we have explored a possible way to reduce BiMeO3 content through additional A‐site substitutions viz. Ca and Sn. The relaxor nature and energy storage properties of Sn‐modified (Ba,Ca)(Ti)O3‐BiScO3 ceramics were determined from their dielectric and ferroelectric behaviors. The material showed attractive properties in terms of a frequency‐independent (200 Hz‐1 MHz) dielectric response from room temperature to 200°C, extremely low loss and high‐energy storage efficiency. The structural phenomena underlying the functional properties of Sn‐modified (Ba,Ca)TiO3‐BiScO3 are characterized from temperature‐dependent X‐ray diffraction and pair distribution function analysis. In broader terms, the study illustrates the potential for tailoring relaxor behavior in Pb‐free ferroelectrics by combining phenomena, such as quantum fluctuations and lone pair stereochemical effect associated with different solid‐solution substitutions.

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Section: Resultssupporting

confidence: 88%

Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

et al. 2019

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“…The mode at ~715 cm −1 is pretty sharp for x ≤ 0.03, which gradually broadens with increasing BZN concentration for x ≥ 0.06. This could possibly indicate an intensified degree of disorder in the system . A transition from ferroelectric long‐range order toward a short‐range order of relaxor‐state is induced with the increase in BZN concentration, which is recognized to be originated from the emergence of polar nanoregions (PNRs) …”

Section: Resultsmentioning

confidence: 99%

Ferroelectric to Relaxor Transition in BaTiO₃–Bi(Zn_2/3Nb_1/3)O₃ Ceramics

Wang

Shen

et al. 2016

J. Am. Ceram. Soc.

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The (1−x)BaTiO3–xBi(Zn2/3Nb1/3)O3 (x = 0.01–0.30) ceramics were synthesized by solid‐state reactions. The solubility limit was determined to be x = 0.20. A systematic structural transition from a tetragonal phase (x ≤ 0.034), to a mixture of tetragonal and rhombohedral phases (0.038 ≤ x ≤ 0.20), and finally to a pseudocubic phase (x ≥ 0.22) at room temperature was identified. Dielectric measurement revealed a ferroelectric (x ≤ 0.04) to relaxor (x ≥ 0.06) transition with permittivity peak broadening and flattening, which was further verified by Raman spectroscopy and differential scanning calorimetry (DSC). Activation energies obtained from the Vogel–Fulcher model displayed an increasing trend from ~0.03 eV for x ~ 0.05, to unusually high values (>0.20 eV) for the compositions with x ≥ 0.15. With the increase in Bi(Zn2/3Nb1/3)O3 content, the polarization hysteresis demonstrated a tendency from high nonlinearity to sublinearity coupled with the reduction in remnant polarization and coervice field. The deconvolution of the irreversible/reversible polarization contribution was enabled by first‐order reversal curve distributions, which indicates that the decreasing polarization nonlinearity with the increase in Bi(Zn2/3Nb1/3)O3 concentration could be related with the change from the ferroelectric domain and domain wall contributions to the weakly coupled relaxor behaviors.

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“…The phase boundary between the high‐temperature cubic phase and the lower‐temperature pseudocubic phase is currently undetermined and the slope likely varies with different M 3+ cations (data extracted from Ref. ). (b) Compositional limit (between P 4 mm and pseudocubic phase) for BaTiO 3 –Bi( M )O 3 systems as a function of tolerance factor of Bi( M )O 3 .…”

Section: Structurementioning

confidence: 99%

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

et al. 2016

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As part of a continued push for high permittivity dielectrics suitable for use at elevated operating temperatures and/or large electric fields, modifications of BaTiO3 with Bi(M)O3, where M represents a net‐trivalent B‐site occupied by one or more species, have received a great deal of recent attention. Materials in this composition family exhibit weakly coupled relaxor behavior that is not only remarkably stable at high temperatures and under large electric fields, but is also quite similar across various identities of M. Moderate levels of Bi content (as much as 50 mol%) appear to be crucial to the stability of the dielectric response. In addition, the presence of significant Bi reduces the processing temperatures required for densification and increases the required oxygen content in processing atmospheres relative to traditional X7R‐type BaTiO3‐based dielectrics. Although detailed understanding of the structure–processing–property relationships in this class of materials is still in its infancy, this article reviews the current state of understanding of the mechanisms underlying the high and stable values of both relative permittivity and resistivity that are characteristic of BaTiO3‐Bi(M)O3 dielectrics as well as the processing challenges and opportunities associated with these materials.

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Relaxor Behavior and Dielectric Properties of Bi(Zn2/3Nb1/3)O3-Modified BaTiO3 Ceramics

Cited by 27 publications

References 41 publications

Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

Ferroelectric to Relaxor Transition in BaTiO₃–Bi(Zn_2/3Nb_1/3)O₃ Ceramics

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics

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Relaxor Behavior and Dielectric Properties of Bi(Zn2/3Nb1/3)O3-Modified BaTiO3 Ceramics

Cited by 27 publications

References 41 publications

Effect of A‐site substitutions on energy storage properties of BaTiO3‐BiScO3 weakly coupled relaxor ferroelectrics

Effect of A‐site substitutions on energy storage properties of BaTiO3‐BiScO3 weakly coupled relaxor ferroelectrics

Ferroelectric to Relaxor Transition in BaTiO3–Bi(Zn2/3Nb1/3)O3 Ceramics

Current Understanding of Structure–Processing–Property Relationships in BaTiO3–Bi(M)O3 Dielectrics

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Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

Effect of A‐site substitutions on energy storage properties of BaTiO₃‐BiScO₃ weakly coupled relaxor ferroelectrics

Ferroelectric to Relaxor Transition in BaTiO₃–Bi(Zn_2/3Nb_1/3)O₃ Ceramics

Current Understanding of Structure–Processing–Property Relationships in BaTiO₃–Bi(M)O₃ Dielectrics