Influence of Zr dopant on the dielectric properties and Curie temperatures of Ba(ZrxTi1−x)O3 (0≤x≤0.12) ceramics

Kuang, S.J.; Tang, Xin‐Gui; Li, L.Y.; Jiang, Yan; Liu, Q.X.

doi:10.1016/j.scriptamat.2009.03.016

Cited by 147 publications

(65 citation statements)

References 18 publications

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“…The radius of Bi 3+ (1.30 Å ) is nearly comparable to the value of Ba 2+ (1.61 Å ) for owing to 12-fold coordination in A-site, 22,23 while both Zn 2+ (0.74 Å , 6 CN) and Nb 5+ (0.64 Å , 6 CN) are larger than that of Ti 4+ (0.605 Å , 6 CN) at the B sites. 24 As a result, the incorporation of BZN will induce the change of BT structure.…”

Section: Methodsmentioning

confidence: 99%

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

Chen

Huang

et al. 2015

Journal of Elec Materi

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1 À x)BaTiO 3À xBi(Zn 2/3 Nb 1/3 )O 3 [(1 À x)BT-xBZN, 0 £ x £ 0.2] ceramics were prepared via a conventional solid-state reaction method. X-ray diffraction (XRD) patterns and Raman spectra analysis show that the ceramics are tetragonal phase when x £ 0.02, and transform to pseudocubic phase as x ‡ 0.06. The temperature and frequency dependences of relative permittivity indicate a gradual crossover from a classic ferroelectric to relaxor ferroelectric. The dielectric relaxor behavior follows a modified Curie-Weiss law. The degree of the phase transition diffuseness (c) and the deviation from the CurieWeiss law ðDT d Þ increase to the maximum at x = 0.08, and subsequently decrease with further increasing x values, which associated with the appearance of polar nanoregions on account of the formation of random fields included local electric fields and elastic fields. Nevertheless, the random fields may decrease by reason of the interaction between the local electric fields and elastic fields.

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Section: Methodsmentioning

confidence: 99%

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

Chen

Huang

et al. 2015

Journal of Elec Materi

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“…The effective ionic radii of substituting the charge compensated pair of Zn 2+ (0.74 Å) and Ti 4+ (0.605 Å) onto the B-site is 0.673 Å. Therefore, the shift in T m as BZT was added could be attributed to a weakening of the bonding in the B-site octahedral network after a substitution of a larger effective B-site ion (Zn 2+ +Ti 4+ , r effective (0.673 Å)) for Nb 5+ (r (Nb5+)~0 .64 Å) [25]. The decrease in T max has been observed in other perovskite systems including Ba(Zr x Ti 1-x )O 3, BiScO 3 -Bi(Zn 0.5 Ti 0.5 )O 3 -BaTiO 3 [26] and NaNbO 3 -Bi 0.5 Li 0.5 TiO 3 [18] Figure 4 shows the trend in T max (determined from the maximum permittivity at 10 kHz) as a function of BZT content.…”

Section: X-ray Diffraction and Lattice Parametermentioning

confidence: 99%

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Prasertpalichat

Cann

2014

J Electroceram

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Ceramics based on the perovskite solid solution (1-x) NaNbO 3 -xBi (Zn 0.5 Ti 0.5 ) O 3 were prepared using conventional solid state synthesis. The crystal structure, electrical, and optical properties were examined. According to diffraction data, a single perovskite phase could be identified up to the composition x=0.09. As the Bi (Zn 0.5 Ti 0.5 ) O 3 content increased the crystal structure transitioned from orthorhombic to pseudocubic symmetry. Furthermore, dielectric data showed that the dielectric maximum shifted to lower temperatures with the addition of Bi (Zn 0.5 Ti 0.5 ) O 3 . Polarization hysteresis data revealed a slim linear loop across the whole range of solid solutions. Optical data also showed a decrease in the optical band gap from 3.4 eV for pure NaNbO3 to 2.9 eV for the x=0.09 composition. Using impedance spectroscopy, an electrically inhomogeneous microstructure was observed for compositions with increased Bi (Zn 0.5 Ti 0.5 ) O 3 content. Finally, the substitution of Ta on the B-site was shown to shift the dielectric maximum to temperatures as low as 100 K.

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“…However, sample with x ¼ 0:05 (BZT1) concentration of Zr-doped BT showed the presence of tetragonal phase characterized by small splitting of (200) peak at around 2 ¼ 45 . 10 Further addition of Zr i.e., x ! 0:10 splitting of the peaks disappeared suggests the developing of cubic phase indicating structural changes with an increase of Zr concentration.…”

Section: Xrd Analysismentioning

confidence: 99%

Studies of phase transition and impedance behavior of Ba(Zr, Ti)O₃ ceramics

et al. 2015

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Ceramic samples of Barium Zirconium Titanate (BaZr x Ti 1Àx O 3 (BZT)) were synthesized by conventional solid-state reaction method with different concentrations of x (¼ 0:05 (BZT1), 0.10 (BZT2), 0.15 (BZT3), 0.20 (BZT4), 0.25 (BZT5), 0.30 (BZT6)). Phase confirmation of the samples was done by X-ray diffraction (XRD) technique. All the compositions are in cubic structure. XRD pattern was recorded for samples sintered at different sintering temperatures. Lattice parameters increased with addition of Zr þ4 . Doping with Zr þ4 into Barium titanate resulted in interesting changes of electrical properties (dielectric, impedance and ferroelectiricity). The strong influence of Zr doping on the phase transition characteristics of the BZT ceramics was studied from the dielectric response of the samples. Diffusivity of phase transition of the BZT ceramic samples increase with Zr þ4 concentration, indicating changes from normal to diffuse transition to relaxor phase transition behavior. Impedance spectroscopy reveals the presence of temperature-dependent grain, grain boundary effects. Polarization-Electricfield (PE) loop measurements are also done on the samples.

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Influence of Zr dopant on the dielectric properties and Curie temperatures of Ba(ZrxTi1−x)O3 (0≤x≤0.12) ceramics

Cited by 147 publications

References 18 publications

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

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

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Studies of phase transition and impedance behavior of Ba(Zr, Ti)O₃ ceramics

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Influence of Zr dopant on the dielectric properties and Curie temperatures of Ba(ZrxTi1−x)O3 (0≤x≤0.12) ceramics

Cited by 147 publications

References 18 publications

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

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

Crystal Structure and electrical properties of complex perovskite solid solutions based on (1-x) NaNbO3-xBi (Zn0.5Ti0.5) O3

Studies of phase transition and impedance behavior of Ba(Zr, Ti)O3 ceramics

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Studies of phase transition and impedance behavior of Ba(Zr, Ti)O₃ ceramics