Influence of processing conditions on the grain growth and electrical properties of barium zirconate titanate ferroelectric ceramics

Jha, P. C.; Jha, A. K.

doi:10.1016/j.jallcom.2011.11.012

Cited by 12 publications

(9 citation statements)

References 31 publications

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“…On the other hand, the significantly increased grain size (as shown in Fig. ) is an extrinsic effect and positive for the enhanced ferroelectricity of the ceramics with x = 0.67, as it is suggested that small grain size means large amount of grain boundary, and grain boundary will leads to polarization discontinuity between grains and hence decreased polarization . Moreover, with increasing BF content, Bi 3+ occupies the A‐site, and Fe 3+ occupies the B‐site, cation vacancies on the A‐ site or B‐site, oxygen vacancies, or electrons will appear to maintain the charge neutrality, which can pin the domain wall motion, decrease resistivity, suppress ferroelectric property, and the observation of saturated polarization.…”

Section: Resultsmentioning

confidence: 91%

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Yang

Zhang

et al. 2014

J. Am. Ceram. Soc.

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The structures, Curie temperature, dielectric relaxor behaviors, ferroelectricity, ferromagnetism, and magnetocapacitance of the (1 -x)Ba 0.70 Ca 0.30 TiO 3 -xBiFeO 3 [(1 -x)BCT-xBF, x = 0-0.90] solid solutions have been systematically investigated. The ceramics have coexisted tetragonal (T) and orthorhombic (O) phases when x ≤ 0.06, coexisted pseudocubic (PC) and O phases when x = 0.065, coexisted cubic and O phases when 0.07 ≤ x ≤ 0.12, PC phase when 0.21 ≤ x ≤ 0.42, coexisted T and rhombohedral (R) phases when 0.52 ≤ x ≤ 0.70, and R phase when x ≥ 0.75. Significantly, composition-dependent microstructures and Curie temperature are observed, the average grain size increases from 1.9 lm for x = 0, reaches 12.0 lm for x = 0.67, and then decreases to 1.3 lm for x = 0.90. At room temperature, the ceramics with x = 0.42-0.70 show piezoelectric properties and multiferroic behaviors, characterized by the polarization-electric field, polarization current intensityelectric field, and magnetization-magnetic field curves, the composition with x = 0.67 has maximum polarization, remnant polarization, maximum magnetization, and remnant magnetization of 15.0 lC/cm 2 , 9.1 lC/cm 2 , 0.33 emu/g, and 0.14 emu/ g, respectively. In addition, the magnetocapacitance is evidenced by the increased relative dielectric constant with increasing the applied magnetic field (H). With DH = 8 kOe, the composition with x = 0.67 shows the largest values of (e r (H) -e r (0))/e r (0) = 2.96% at room temperature. The structure-property relationship is discussed intensively.

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Section: Resultsmentioning

confidence: 91%

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Yang

Zhang

et al. 2014

J. Am. Ceram. Soc.

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“…The introduction of BF not only suppresses the tetragonal phase and enhances the pseudocubic phase, which is detrimental for ferroelectric property but also leads to significantly increased grain size, which is positive for ferroelectric property because of small grain size meaning large amount of grain boundary, and ground boundary will lead to polarization discontinuity between grains and hence decreased polarization . The above two competing effects should be responsible for the observed composition‐dependent ferroelectric property: when x ≤ 0.05, the positive effect dominates, whereas when x > 0.05, the detrimental effect tends to be dominative.…”

Section: Resultsmentioning

confidence: 99%

Phase Transition and Electrical Properties of Ba_0.7Ca_0.3TiO₃–BiFeO₃ Ceramics

Yang

Zhang

et al. 2012

J. Am. Ceram. Soc.

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Lead-free piezoelectric ceramics of (1 À x)Ba 0.70 Ca 0.30 TiO 3 -x BiFeO 3 [(1 À x)BCT-xBF, x = 0-0.065] have been prepared and investigated. The ceramics with x 0.06 have diphasic tetragonal and orthorhombic crystal structures, whereas tetragonal phase is suppressed by the introduction of BF. As a result, the composition with x = 0.065 is found to have diphasic pseudocubic and orthorhombic phases. Significantly compositiondependent grain size is observed. With increasing x from 0 to 0.065, the ferroelectric-paraelectric phase transition temperature decreases monotonically from 128°C to 50°C, accompanied by enhanced ferroelectric relaxor behavior, as indicated by the widened diffused phase transition temperature. The room temperature polarization-electric field (P-E) hysteresis loops and strain-electric field (S-E) curves indicate that the ferroelectricity enhances slightly and reaches the maximum near x = 0.05, and then weakens with increasing x. On the other hand, the piezoelectric coefficient (d 33 ) and electromechanical coupling coefficient (k p ) decrease simultaneously with increasing x, whereas the mechanical quality factor (Q m ) reaches the maximum near x = 0.05. The structure-property relationship is discussed intensively. Our results may be helpful for further understanding and designing BaTiO 3 -related lead-free ferroelectric/piezoelectric materials.

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“…It is attributed to the effect of acceptor doping and low surface roughness on the dielectric loss. Furthermore, film composition and treatment process have significant effect on the defect density, the impurity energy level, surface roughness and dielectric properties of the films [22][23]. Therefore, it will affect the dielectric loss of the films in some degree and make the dielectric loss decrease with the increasing of Zn content simultaneously.…”

Section: Film Characterizationmentioning

confidence: 99%

Dielectric Properties and Structures of Zn-doped Barium Zirconate Titanate Films

Liu

Deng

Liu

et al. 2014

Integrated Ferroelectrics

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The Zn-doped Ba(Zr 0.2 Ti 0.8 )O 3 (BZT) films were prepared by sol-gel processing on Pt/Ti/SiO 2 /Si substrates. The crystal structures, surface morphology, dielectric properties of Zn-doped BZT films were investigated as a function of Zn content. It is found that the films belong to the perovskite structure. In addition, the dielectric constant decreases at first and then increases with the increasing of Zn content, but the dielectric loss decreases with the increasing of Zn content at room temperature. Finally, it also can be found that the Curie temperature of the Zn-doped BZT films is lower than that of the pure BZT films.

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Influence of processing conditions on the grain growth and electrical properties of barium zirconate titanate ferroelectric ceramics

Cited by 12 publications

References 31 publications

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Phase Transition and Electrical Properties of Ba_0.7Ca_0.3TiO₃–BiFeO₃ Ceramics

Dielectric Properties and Structures of Zn-doped Barium Zirconate Titanate Films

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Influence of processing conditions on the grain growth and electrical properties of barium zirconate titanate ferroelectric ceramics

Cited by 12 publications

References 31 publications

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba0.7Ca0.3TiO3–xBiFeO3 Ceramics

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba0.7Ca0.3TiO3–xBiFeO3 Ceramics

Phase Transition and Electrical Properties of Ba0.7Ca0.3TiO3–BiFeO3 Ceramics

Dielectric Properties and Structures of Zn-doped Barium Zirconate Titanate Films

Contact Info

Product

Resources

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Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Enhanced Multiferroic and Magnetocapacitive Properties of (1 − x)Ba_0.7Ca_0.3TiO₃–xBiFeO₃ Ceramics

Phase Transition and Electrical Properties of Ba_0.7Ca_0.3TiO₃–BiFeO₃ Ceramics