A comparative study of structural and electrical properties in lead-free BCZT ceramics: Influence of the synthesis method

Coondoo, Indrani; Panwar, Neeraj; Аликин, Д. О.; Bdikin, Igor; Islam, S. S.; Турыгин, А. П.; Shur, V. Ya.; Kholkin, A. L.

doi:10.1016/j.actamat.2018.05.029

Cited by 94 publications

(34 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value is very similar to PMMA Young’s modulus of elasticity—1.8–3.1 GPa [ 33 ]. In comparison to pure BCZT, its Young’s modulus is around 118 GPa [ 34 ], so about 10 times bigger. However, obtained results are in accordance with the literature, which states that if material has lower Young’s modulus, then it will have much higher piezoelectric coefficients [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…In comparison to pure BCZT, its Young’s modulus is around 118 GPa [ 34 ], so about 10 times bigger. However, obtained results are in accordance with the literature, which states that if material has lower Young’s modulus, then it will have much higher piezoelectric coefficients [ 34 ]. Moreover, piezoelectric material with higher thickness has much higher d33 piezoelectric coefficient, therefore, the generated voltage is higher too [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have shown that a fine domain structure of barium titanate (BT) material during the synthesis routes can greatly improve its dielectric and piezoelectric properties. For BT at room temperature, d 33 values ranging from 350 [ 36 ] to 500 pC/N and d 31 = −185 pC/N were achieved [ 34 ]. Thus, PZT d 33 piezoelectric coefficient varies from 152 to 593 pC/N [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Biologically Compatible Lead-Free Piezoelectric Composite for Acoustophoresis Based Particle Manipulation Techniques

Janušas

Urbaite

Palevičius

et al. 2021

Sensors

View full text Add to dashboard Cite

This research paper is concentrated on the design of biologically compatible lead-free piezoelectric composites which may eventually replace traditional lead zirconium titanate (PZT) in micromechanical fluidics, the predominantly used ferroelectric material today. Thus, a lead-free barium–calcium zirconate titanate (BCZT) composite was synthesized, its crystalline structure and size, surface morphology, chemical, and piezoelectric properties were analyzed, together with the investigations done in variation of composite thin film thickness and its effect on the element properties. Four elements with different thicknesses of BCZT layers were fabricated and investigated in order to design a functional acoustophoresis micromechanical fluidic element, based on bulk acoustic generation for particle control technologies. Main methods used in this research were as follows: FTIR and XRD for evaluation of chemical and phase composition; SEM—for surface morphology; wettability measurements were used for surface free energy evaluation; a laser triangular sensing system—for evaluation of piezoelectric properties. XRD results allowed calculating the average crystallite size, which was 65.68 Å3 confirming the formation of BCZT nanoparticles. SEM micrographs results showed that BCZT thin films have some porosities on the surface with grain size ranging from 0.2 to 7.2 µm. Measurements of wettability showed that thin film surfaces are partially wetting and hydrophilic, with high degree of wettability and strong solid/liquid interactions for liquids. The critical surface tension was calculated in the range from 20.05 to 27.20 mN/m. Finally, investigations of piezoelectric properties showed significant results of lead-free piezoelectric composite, i.e., under 5 N force impulse thin films generated from 76 mV up to 782 mV voltages. Moreover, an experimental analysis showed that a designed lead-free BCZT element creates bulk acoustic waves and allows manipulating bio particles in this fluidic system.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Biologically Compatible Lead-Free Piezoelectric Composite for Acoustophoresis Based Particle Manipulation Techniques

Janušas

Urbaite

Palevičius

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the piezoelectric properties of lead-free piezoelectric ceramics could not compare with the lead zirconate titanate based ceramics. Therefore, many methods, such as improvement of preparation method [11], optimization of sintering process [12][13][14], doping strategy, and texturing [15,16], were applied to construct morphotropic phase boundary (MPB) and polycrystalline phase boundary at room temperature. Excitingly, Ren et al modified BT ceramics by introducing Ca 2+ and Zr 4+ ions to construct the rhombohedral-orthorhombictetragonal coexistence at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering of BCZT–based Piezoelectric Ceramics with High Piezoelectric Properties

Wang

Huan

Zhu

et al. 2021

Preprint

View full text Add to dashboard Cite

The intrinsic conduction mechanism and optimal sintering atmosphere of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) ceramics was regulated by doping Mn element in this work. By Hall and impedance analysis, the undoped BCZT ceramics exhibit a typical n–type conduction mechanism, and the electron concentration decreases with the increasing oxygen partial pressure. Therefore, the undoped ceramics exhibit best electrical properties (d33 = 585 pC/N, kp = 56%) in O2. A handful of Mn doping element would transfer the conduction mechanism from n-type into p–type. And the hole concentration reduces with the decreasing oxygen partial pressure for Mn-doped BCZT ceramics. Therefore, the Mn-doped ceramics sintered in N2 have the highest insulation resistance and best piezoelectric properties (d33 = 505 pC/N, kp = 50%). The experimental results demonstrate that the doping Mn element can effectively adjusts the intrinsic conduction mechanism and then predicts the optimal atmosphere.

show abstract

“…Coondoo et al compared the mechanical properties of sol‐gel synthesized BZT−50BCT with those of conventional oxides method. They concluded that the synthesis method controls the grain size to influence the mechanical properties, and that the chemically synthesized BCZT with larger values of hardness and Young's Modulus showed lower piezoelectric coefficients …”

Section: Introductionmentioning

confidence: 99%

Electrical and mechanical properties of BZT − xBCT lead‐free piezoceramics

Hayati

Fayazi

Diargar

et al. 2020

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this study, lead‐free (1 − x)Ba(Zr0.2Ti0.8)O3 − x(Ba0.7Ca0.3)TiO3 compositions are synthesized via conventional solid oxide route, and the ceramics are fabricated with normal sintering in air. The effects of composition fluctuations on dielectric, piezoelectric, and mechanical properties are investigated. The phase structure and the microstructure are analyzed with X‐ray diffraction and scanning electron microscopy. The best dielectric and piezoelectric properties of εr = 11 207 and d33 = 330 pC/N were obtained for BZT−0.35BCT and BZT−0.5BCT ceramics, respectively. The mechanical behavior—in terms of Vickers hardness and compressive and flexural strengths—was investigated, and the best mechanical behavior was found in the vicinity of the phase transition boundary with x values between 0.5 and 0.6.

show abstract

A comparative study of structural and electrical properties in lead-free BCZT ceramics: Influence of the synthesis method

Cited by 94 publications

References 75 publications

Biologically Compatible Lead-Free Piezoelectric Composite for Acoustophoresis Based Particle Manipulation Techniques

Biologically Compatible Lead-Free Piezoelectric Composite for Acoustophoresis Based Particle Manipulation Techniques

Defect Engineering of BCZT–based Piezoelectric Ceramics with High Piezoelectric Properties

Electrical and mechanical properties of BZT − xBCT lead‐free piezoceramics

Contact Info

Product

Resources

About