Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

Li, Wei; Xu, Zhijun; Chu, Ruiqing; Fu, Peng; Zang, Guo-Zhong

doi:10.1590/s0103-97332010000300018

Cited by 38 publications

(10 citation statements)

References 13 publications

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“…It can be seen that the magnitude of F t is similar for most of the compositions. 8,25,26,29,36,37 It should be noted that the R m is about 0.80 from Ref. 8.…”

Section: Resultsmentioning

confidence: 82%

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Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

et al. 2014

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Three composition groups in the BaTiO3–CaTiO3–BaHfO3 ternary system, (1 − x)Ba(HfyTi1−y)O3–x(Ba1−zCaz)TiO3 (abbreviated as BHyT–xBCzT with x = 0–1.0, y = 0.16, z = 0.20; x = 0–1.0, y = 0.16, z = 0.30; x = 0–1.0, y = 0.20, z = 0.30, respectively), have been designed for investigating the variation of the intermediate O‐phase region and its effect on the electrical properties. The temperature‐composition phase diagram of each group has been proposed based on the X‐ray diffraction patterns and the temperature‐dependent dielectric behaviors. The enhanced piezoelectric properties are achieved in the O–T phase boundary compositions of the three groups, which are BH0.16T–0.58BC0.20T, BH0.16T–0.48BC0.30T and BH0.20T–0.53BC0.30T, respectively. Piezoelectric coefficient d33 of 448 pC/N is obtained in BH0.20T–0.53BC0.30T, which is higher than those of the other two phase boundary compositions. The O‐phase zone in BH0.20T–xBC0.30T is narrower than those in the BH0.16T–xBC0.20T and BH0.16T–xBC0.30T. In spite of its small O‐phase volume occupancy, the O‐phase plays a key role in the properties of the system. Our work confirms that the enhancement in piezoelectric properties is not only related to the O–T phase boundary near room temperature (RT), but also related to the shift of TR‐O toward RT. In addition, a quantitative relation between the phase boundary composition and atomic mole ratio of Hf to Ca (Rm) is proposed, which the Rm value corresponding to the phase boundary is about 0.58. The results clearly demonstrate that in this system high piezoelectric properties are achieved by tuning the specific Rm value. Such a work may provide new clues for designing lead‐free piezoelectric materials with enhanced piezoelectric property.

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“…It can be seen that the magnitude of F t is similar for most of the compositions. 8,25,26,29,36,37 It should be noted that the R m is about 0.80 from Ref. 8.…”

Section: Resultsmentioning

confidence: 82%

“…3(a), respectively. 20,25 On the other hand, it is worth noting that the piezoelectric and dielectric properties of three samples located on the red phase boundary line in Fig. 4(a).…”

Section: Methodsmentioning

confidence: 98%

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

et al. 2014

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“…Table summarizes the remanent polarization ( P r ), the coercive field ( E c ), and the piezoelectric coefficient ( d 33 ) for the BaTi 1− x Zr x O 3 ceramics at 25°C. Values obtained by other authors are included for comparison. The substitution of Ti 4+ for Zr 4+ hardens the ceramics and reduces their ferroelectric and piezoelectric properties.…”

Section: Resultsmentioning

confidence: 99%

Microstructural Features and Functional Properties of Bilayered BaTiO₃/BaTi_1−xZr_xO₃ Ceramics

et al. 2014

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Validity of mixture rule for dielectrics in series configuration and the correlation between microstructure and electrical properties in bilayered BaTiO 3 /BaTi 1-x Zr x O 3 ceramics were studied. Samples were obtained from BaTi 1-x Zr x O 3 (BTZx) nanopowder synthesized by the polymeric precursor technique and had their microstructure, dielectric, piezoelectric and ferroelectric properties investigated.These bilayered ceramics properties were compared to the properties of homogeneous BTZx samples. And, also, the former's electrical permittivities were compared with the predictions of the simple mixture rule. According to the results, the microstructures of the layers do not differ from the microstructure of the corresponding homogeneous BTZx ceramic. And pyroelectric coefficient measurements show that the electrical properties of the interface do not contribute to the functional properties of the bilayered samples. Nevertheless, on increasing Zr 4+ , the agreement between the experimental and the predicted permittivity of the 1 thimaral@ursa.ifsc.usp.br 2 bilayered ceramics is gradually reduced, mainly at temperatures where the permittivity is governed by the response of the layer containing Zr 4+ . As a mechanical joint between the layers, the interface induces stresses during sintering due to thermal mismatch between compositions, thereby affecting the bilayer's electrical properties. Our results show that mechanical interface effects compromise the functional properties of layered ferroelectric ceramics.

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“…Recent study on [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2-Ti 0.8 O 3 )](xBCT-(1 -x)BZT) with x = 0.5 exhibits a morphotropic phase boundary (MPB) near room temperature, and it shows an interesting ferroelectric, piezoelectric, and elastic properties in the vicinity of 25°C [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric and magnetodielectric properties of LSMO–(BCT–BZT) composites

Mane¹,

Tarale

Chavan³

et al. 2015

Indian J Phys

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The present paper reports magnetoelectric and magnetodielectric properties of La 0.67 Sr 0.33 MnO 3 and (Ba 0.7 Ca 0.3 TiO 3 )-(BaZr 0.2 Ti 0.8 O 3 ) composites. y(La 0.67 Sr 0.33 MnO 3 ) ? (1 -y)[x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2-Ti 0.8 O 3 )] particulate composites are prepared for x = 0.40, 0.45, and 0.50 and for y = 0.1 and 0.175. Ferroelectric compositions [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] are synthesized via ceramic route, while La 0.67 Sr 0.33 MnO 3 is synthesized via hydroxide co-precipitation route. Composites of La 0.67 Sr 0.33 MnO 3 and (Ba 0.7 Ca 0.3 TiO 3 )-(BaZr 0.2 Ti 0.8 O 3 ) are synthesized using ceramic method. The crystal structures of La 0.67 Sr 0.33 MnO 3 , [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2-Ti 0.8 O 3 )], and composites are investigated using X-ray diffractograms, while microstructures are investigated using scanning electron microscope. The dielectric properties of [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] are determined as a function of temperature between 30 and 150°C and at frequencies 1, 10, 100 kHz, and 1 MHz. The investigations on P-E hysteresis loops of [x(Ba 0.7 Ca 0.3 TiO 3 )-(1 -x)(BaZr 0.2 Ti 0.8 O 3 )] show useful values of maximum polarization (P max ) and remanent polarization (P r ). Dielectric study on composites is carried out as a function of frequencies between 1 kHz and 1 MHz and for magnetic field between 0 and 6 KOe. The linear magnetoelectric coefficient ''a'' and quadratic magnetoelectric coefficient ''b'' are measured with the help of custom-designed setup. The results on magnetoelectric and magnetodielectric properties of composites are interesting.

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Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

Cited by 38 publications

References 13 publications

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

Microstructural Features and Functional Properties of Bilayered BaTiO₃/BaTi_1−xZr_xO₃ Ceramics

Magnetoelectric and magnetodielectric properties of LSMO–(BCT–BZT) composites

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Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

Cited by 38 publications

References 13 publications

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO3–CaTiO3–BaHfO3 System

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO3–CaTiO3–BaHfO3 System

Microstructural Features and Functional Properties of Bilayered BaTiO3/BaTi1−xZrxO3 Ceramics

Magnetoelectric and magnetodielectric properties of LSMO–(BCT–BZT) composites

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Product

Resources

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Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

Phase Diagram and Enhanced Piezoelectric Response of Lead‐Free BaTiO₃–CaTiO₃–BaHfO₃ System

Microstructural Features and Functional Properties of Bilayered BaTiO₃/BaTi_1−xZr_xO₃ Ceramics