Dielectric Behavior of Ba(Ti1 − xZrx)O3Solid Solution

Bokov, Alexei A.; Maglione, Mario; Simon, A.; Ye, Z. G.

doi:10.1080/00150190600716747

Cited by 27 publications

(18 citation statements)

References 13 publications

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“…[1][2][3][4][5][6][7] However, the toxicity of lead has raised concerns about lead-based materials. 9,10 Recent theoretical studies on bismuth aluminate predicted that BiAlO 3 could be a promising lead-free candidate ferroelectric material with a Curie temperature ͑T C ͒ about 800 K. 15 However, BiAlO 3 could only be prepared by a high-pressure high-temperature technique and it decomposes above 820 K. 16 Its structure was refined to be perovskite-like with a polar rhombohedral symmetry at room temperature. An increasing number of such materials have been derived from BaTiO 3 by homovalent cationic substitutions such as Ba͑Ti 1−x Zr x ͒O 3 ͑Refs.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Hong

2008

Journal of Applied Physics

133

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A new lead-free perovskite solid solution of ͑1−x͒BaTiO 3 -xBiAlO 3 ͑x = 0.02, 0.05, 0.10, and 0.15͒ that exhibits ferroelectric properties and relaxor behavior has been synthesized by solid state reactions. X-ray diffraction patterns show a transformation from the tetragonal symmetry into a rhombohedral symmetry as a result of the substitutions of Bi 3+ on the A site and Al 3+ on the B site in the crystal lattice of BaTiO 3 . The temperature and frequency dependences of the dielectric constant indicate a crossover from a normal ferroelectric to relaxor behavior. The degree of deviation from the Curie-Weiss law is found to increase with the increasing amount of BiAlO 3 . The high-temperature slope of the dielectric peak for x = 0.05, 0.1 and, 0.15 can be well described by a Lorenz-type relation. Typical relaxor behavior is observed for x = 0.15 with the temperature of the dielectric peak T m = 360 K at 1 kHz, while ferroelectric hysteresis loop is displayed at room temperature. This suggests that the long-range polar order from the end member BaTiO 3 persists and coexists with polar nanoregions induced by the chemical disorder following the coupled substitutions in the solid solution.

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Section: Introductionmentioning

confidence: 99%

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Hong

2008

Journal of Applied Physics

133

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“…Compared with other BaTiO 3 -based solid solutions formed by homovalent substitutions on the B site of the perovskite structure, such as Ba(Ti 1-x Zr x )O 3 [9,37], Ba(Ti 1−x Sn x )O 3 [10,11], for greater values of x, the behavior was of relaxor type, and the (1-x)BaTiO 3 -xBiAlO 3 [38] solid solution obtained by coupled heterovalent substitutions both on the A and B sites, the BST-CBT ceramics exhibit the typical relaxor effect for.a relative lower substitution rate( x=2%). It is also found that T m (in table.1.)…”

Section: Resultsmentioning

confidence: 99%

Dielectric properties and relaxor behavior of Ba<inf>0.67</inf>Sr<inf>0.33</inf>TiO<inf>3</inf>-CaBi<inf>4</inf>Ti<inf>4</inf>O<inf>15</inf> ceramics

Liu

et al. 2012

Proceedings of ISAF-ECAPD-PFM 2012

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1-x)Ba 0.67 Sr 0.33 TiO 3 (BST)+xCaBi 4 Ti 4 O 15 (CBT) (x=0, 2%, 4%, 6% and 8%) lead-free relaxor ferroelectric ceramics with submicro grain size of about 200nm were prepared by solidstate reactions. Structure and dielectric properties of BST-CBT have been investigated. X-ray diffraction patterns show a relative low degree of solubility as a result of coupled substitutions of Bi 3+ and Ca 2+ both on the A site and the specific structure of CBT. The temperature and frequency dependences of the dielectric constant indicate a crossover from a normal ferroelectric to relaxor behavior. The degrees of diffuseness and relaxor behavior are found to increase with the increasing amount of CBT. The frequency dependence of the temperature of dielectric peak Tm can be well described by Vogel-Fulcher relation. The activation energy Ea increases with x increasing, indicating the more and more energy for the polarization reversal of micropolar regions, which is associated with the enhanced interactions of polar domains.

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“…[11]). Although these materials exhibit the characteristics of relaxor behavior, it has been shown that the origin of dielectric relaxation and the dipole dynamics of Ba(Ti 1−x Zr x )O 3 (with x = 0.325) are different from PMN, and upon cooling it enters a quasi-ferroelectric state instead of a nonergotic relaxor state [7,12]. On the other hand, the dielectric properties are also known to depend on preparation conditions and subsequent thermal treatments.…”

Section: Introductionmentioning

confidence: 97%

“…An increasing number of such materials have been derived from BaTiO 3 by homovalent cationic substitutions such as Ba(Ti 1−x Zr x )O 3 and Ba(Ti 1−x Sn x )O 3 , or heterovalent substitutions such as (1-x)BaTiO 3 -xBiAlO 3 and Ba 1−x K x (Ti 1−x Nb x )O 3 [7][8][9][10]. In addition, a gradual crossover from a normal ferroelectric state to relaxor behavior has been observed in Ba(Ti 1−x Zr x )O 3 and Ba(Ti 1−x Sn x )O 3 with high enough x [7,8]. It is believed that the relaxor behavior originates from the compositional disorder associated with different kinds of ions occupying the crystallographically equivalent sites (for a recent review on relaxors, see Ref.…”

Section: Introductionmentioning

confidence: 99%

Effects of Sintering Temperature on the Relaxor Behavior of 0.85BaTiO₃-0.15BiAlO₃Solid Solution

Hong

2009

Ferroelectrics

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Typical relaxor behavior was observed in lead-free 0.85BaTiO 3 -0.15BiAlO 3 solid solution, which was found to depend on the sintering temperature of the ceramics. With the sintering temperature decreased from 1350 • C to 1250 • C, the relaxor behavior is enhanced while the temperature of the dielectric maximum (T m ) decreases. The decrease of sintering temperature also results in an increase in the degree of deviation from the Curie-Weiss law. The frequency dependence of the temperature T m fits well to the Vogel-Fulcher law. Ferroelectric hysteresis loops displayed at room temperature show that the remnant polarizations (P r ) decreases as the sintering temperature decreases.

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Dielectric Behavior of Ba(Ti_{1 − x}Zr_x)O₃Solid Solution

Cited by 27 publications

References 13 publications

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Dielectric properties and relaxor behavior of Ba<inf>0.67</inf>Sr<inf>0.33</inf>TiO<inf>3</inf>-CaBi<inf>4</inf>Ti<inf>4</inf>O<inf>15</inf> ceramics

Effects of Sintering Temperature on the Relaxor Behavior of 0.85BaTiO₃-0.15BiAlO₃Solid Solution

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Dielectric Behavior of Ba(Ti1 − xZrx)O3Solid Solution

Cited by 27 publications

References 13 publications

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Dielectric properties and relaxor behavior of a new (1−x)BaTiO3–xBiAlO3 solid solution

Dielectric properties and relaxor behavior of Ba<inf>0.67</inf>Sr<inf>0.33</inf>TiO<inf>3</inf>-CaBi<inf>4</inf>Ti<inf>4</inf>O<inf>15</inf> ceramics

Effects of Sintering Temperature on the Relaxor Behavior of 0.85BaTiO3-0.15BiAlO3Solid Solution

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Dielectric Behavior of Ba(Ti_{1 − x}Zr_x)O₃Solid Solution

Effects of Sintering Temperature on the Relaxor Behavior of 0.85BaTiO₃-0.15BiAlO₃Solid Solution