Evolution from ferroelectric to diffused ferroelectric, and relaxor ferroelectric in BaTiO3-BiFeO3 solid solutions

Wang, Yaru; Pu, Yongping; Li, Xin; Zheng, Hanyu; Gao, Ziyan

doi:10.1016/j.matchemphys.2016.08.024

Cited by 19 publications

(6 citation statements)

References 35 publications

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“…The Curie region width is sensitive to the compositional fluctuations. In the present case, the region around the dielectric maxima is found to be broadened, by suggesting a diffused phase transition, which can be ascribed to the co-existence of the ferroelectric and paraelectric regions (co-existence of microregions) in the vicinity of the transition temperature [20]. The inter ionic distances are temperature-dependent.…”

Section: Temperature Dependencementioning

confidence: 43%

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

et al. 2018

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Owing to a wide range of applications, ferroelectric ceramics have remained the center of attention of researchers over a large period. With this perception, the present article reports the effects of the substitution of Ba2+ in lead titanate (PT) on its structural and electrical properties. X-ray diffractometry was employed for the phase confirmation and to reveal the crystallographic data. It authenticates the single-phase formation with a systematic decrease in the anisotropy. Typical X-ray diffraction data are refined, by using the Rietveld method. The substitution of Ba2+ in PT ceramics has caused a reduction in the ferroelectric Curie temperature and significant changes in dielectric properties.

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Section: Temperature Dependencementioning

confidence: 43%

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

et al. 2018

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“…This behavior is associated with the chemical heterogeneity of the material and the decomposition of the macro-nano domain into a nanodomain structure near the ferroelectric paraelectric phase transition. Ferroelectrics can be classified as normal ferroelectrics, dispersion ferroelectrics, and relaxor ferroelectrics [43]. Normal ferroelectrics are distinguished by a sharp phase change peak, dispersed ferroelectrics by a broad phase change peak, and relaxor ferroelectrics by a broad phase change peak, which gradually shifts to higher temperatures as the frequency increases.…”

Section: Resultsmentioning

confidence: 99%

High-Temperature Piezoelectric Response and Thermal Stability of BiGaO3 Modified BiFeO3–BaTiO3 Lead-Free Piezoelectric Ceramics

et al. 2023

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BiGaO3 doped BiFeO3–BaTiO3 ceramics were prepared by the traditional solid-phase synthesis process. The phase analysis, microstructure, piezoelectric, ferroelectric, dielectric properties, and thermal stability of 0.7BiFeO3-(0.3 − x)BaTiO3-xBiGaO3 (Abbreviated as BF–BT-xBG) were investigated. The results show that the ceramics have rhombohedral (R) and tetragonal (T) structures. Particle dimensions gradually get bigger with the increase of BiGaO3 concentration, and dense ceramic grains were observed through SEM. Electrical properties of BF–BT-xBG are improved after adding a small amount of BiGaO3: piezoelectric constants d33 = 141 pC/N, electromechanical coupling coefficient kp = 0.314, mechanical Quality Factor Qm = 56.813, dielectric loss tanδ = 0.048, residual polarization intensity Pr = 18.3 µC/cm2, Curie temperature Tc = 485.2 °C, depolarization temperature Td = 465 °C for x = 0.003. The “temperature-piezoelectric performance” curve under in situ d33 indicates that piezoelectric properties d33 increase rapidly with increasing temperature. Remarkably, the piezoelectric response d33 reaches a maximum of 466 pC/N at a temperature T = 340 °C, and afterward, reduces gradually to zero with increasing temperature until 450 °C.

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“…The O 1s peak was fitted with three subpeaks located at ca. 528.5, 531, and 533 eV, corresponding to the lattice oxygen, oxygen associated with oxygen vacancies, and oxygen bonded to carbon, respectively . Despite the weakness of signals in the Mn spectra due to the low doping concentration, the reduced states (Mn, Mn 2+ , and Mn 3+ ) can be distinguished from the spectra.…”

Section: Results and Discussionmentioning

confidence: 99%

“…528.5, 531, and 533 eV, corresponding to the lattice oxygen, oxygen associated with oxygen vacancies, and oxygen bonded to carbon, respectively. 7 Despite the weakness of signals in the Mn spectra due to the low doping concentration, the reduced states (Mn, Mn 2+ , and Mn 3+ ) can be distinguished from the spectra. The fitted parameters for the Fe 2p, O 1s, and Mn 2p analyses are summarized in Tables S4−S6.…”

Section: Xps Analysismentioning

confidence: 99%

“…In this respect, (1– x )BiFeO 3 – x BaTiO 3 (BFBT) ferroelectrics have attracted attention. The x = 0.33 (0.67BiFeO 3 –0.33BaTiO 3 , BF67BT33) composition lies at the morphotropic phase boundary (MPB) and exhibits a high Curie temperature ( T c ), high remnant polarization ( P r ), and good thermal stability. − However, the high leakage current in BFBT ceramics, due to the existence of oxygen vacancies generated by Fe 3+ → Fe 2+ reduction at high temperatures, impedes their piezoelectric applications . The insulating properties of BFBT can be improved by doping with a variety of elements, e.g., Cu, Mn, Nb, Zn, Cr, Co, Ga, La, Nd, Sm, and Gd. − Among these, Mn-modified BF67BT33 has shown significantly improved d 33 and resistance compared with unmodified ceramics. ,, …”

Section: Introductionmentioning

confidence: 99%

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Grain Size Effects in Mn-Modified 0.67BiFeO₃–0.33BaTiO₃ Ceramics

Yue

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Grain size can have significant effects on the properties of electroceramics for dielectric, piezoelectric, and ferroelectric applications. Here, we systematically investigate the effect of grain size on the structure and properties of Mn-modified 0.67BiFeO3–0.33BaTiO3 ceramics, an important lead-free piezoelectric ceramic that exhibits both a high piezoelectric coefficient and a high Curie point. Ceramics with average grain sizes ranging from 0.46 to 6.85 μm were prepared using conventional and spark plasma sintering. It was found that the morphotropic phase boundary compositions are composed of two polar structures, rhombohedral and tetragonal, with DC poling inducing an increase in the fraction of the rhombohedral phase. All ceramics show relaxor behavior and their freezing temperature moves to higher temperatures with increasing grain size, although their Burns temperature is independent of grain size. In fine-grained ceramics, which show pronounced relaxor behavior, significant grain size dependency is seen in dielectric, piezoelectric, and ferroelectric properties, which is attributed to the presence of single ferroelectric domains and high concentrations of polar nanoregions. In coarse-grained ceramics, a critical grain size of 2.83 μm yields the highest dielectric permittivity at room temperature, with the piezoelectric coefficient plateauing at this grain size, which can be attributed to the contribution of both polar nanoregions and high domain wall density.

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Evolution from ferroelectric to diffused ferroelectric, and relaxor ferroelectric in BaTiO3-BiFeO3 solid solutions

Cited by 19 publications

References 35 publications

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

High-Temperature Piezoelectric Response and Thermal Stability of BiGaO3 Modified BiFeO3–BaTiO3 Lead-Free Piezoelectric Ceramics

Grain Size Effects in Mn-Modified 0.67BiFeO₃–0.33BaTiO₃ Ceramics

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Evolution from ferroelectric to diffused ferroelectric, and relaxor ferroelectric in BaTiO3-BiFeO3 solid solutions

Cited by 19 publications

References 35 publications

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

Structural and Dielectric Properties of Ba2+ Substituted Lead-Barium-Titanate Ceramics

High-Temperature Piezoelectric Response and Thermal Stability of BiGaO3 Modified BiFeO3–BaTiO3 Lead-Free Piezoelectric Ceramics

Grain Size Effects in Mn-Modified 0.67BiFeO3–0.33BaTiO3 Ceramics

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Grain Size Effects in Mn-Modified 0.67BiFeO₃–0.33BaTiO₃ Ceramics