Electric field effect on the microstructure and properties of Ba0.9Ca0.1Ti0.9Zr0.1O3 (BCTZ) lead-free ceramics

Reyes-Montero, Armando; Rubio-Marcos, Fernando; Pardo, L.; Campo, Adolfo del; López-Juárez, Rigoberto; Villafuerte‐Castrejon, M. E.

doi:10.1039/c7ta09798k

Cited by 26 publications

(7 citation statements)

References 46 publications

(61 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slightly smaller values of k t and d 33 in Table compared with the current literature may be due to the chemical inhomogeneity in triple grain junctions of the ceramics in this study, which was revealed by exhaustive EDS analysis (Figure S1). However, the overall performance is similar to that reported for BCTZ ×10 ceramic with similar grain size obtained by the Pechini method . These results show that the electromechanical activity of BCTZ strongly depends, in addition to the specific composition, on its crystal and ceramic microstructure.…”

Section: Resultssupporting

confidence: 86%

“…The domains are identified as a lamellar typelike shape with a domain width ( d ) value average of ∼1 μm, Figure d. High-resolution (HR) images display a lamellar typelike domain structure (Figure e), already reported for BaTiO 3 single crystals , or other BCTZ compositions . Considering a classical approach for ceramic samples, it is well-known that the domain width, d , is related to the grain size, G , as d ∼ .…”

Section: Resultsmentioning

confidence: 67%

See 1 more Smart Citation

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field

Reyes-Montero

Rubio-Marcos

Fuentes-Cobas

et al. 2021

ACS Appl. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

The synergetic role of the phase transitions taking place between long-range, polar ordered, ferroelectric phases in lead-free ceramics with Ba 0.85 Ca 0.15 Ti 0.90 Zr 0.10 O 3 composition on their electromechanical behavior has been analyzed. Synchrotron X-ray diffraction (XRD) and Rietveld analysis revealed a room temperature coexistence of rhombohedral (R), tetragonal (T), and orthorhombic (O) phases. The proportions of these phases in the investigated samples vary from the order of 42R-45T-13O in the nonpolarized condition to an estimated 65R-26T-9O in the polarized, significantly textured sample. These characteristics are related to the complex ferroelectric domain distribution that electron scanning microscopy exposes, which favors domain wall mobility and provides a large extrinsic contribution to the electromechanical response of the material. A confocal Raman spectroscopy and imaging study was carried out on both unpoled and poled samples and reveals that, under the action of the electric field, the E(LO 3 ) + A 1 (LO 2 ) + E(TO 4 ) mode of the Raman spectra shifts from 517.8 to 516.4 cm −1 , indicating the lengthening of the distance between B 5+ type ions and their coordinated oxygens for the poled samples. Besides, the mentioned spatially resolved model of the Raman spectra shows a narrower distribution in the poled sample, compatible with the strong texture revealed by XRD. Photoacoustic signal evolution with the temperature, in agreement with the dielectric permittivity curve, reveals the diffusive character of the phase transition taking place at 40 °C between the long-range polar ordered phase at low temperature and the high temperature one, which influences the phase coexistence at room temperature. Moreover, an evaluation of the resultant complex piezoelectric, dielectric, and elastic coefficients at resonance, including all losses, is presented. The obtained results indicate the remarkable electromechanical activity, its anisotropy, and the soft character of this ferro-piezo-electric type ceramic.

show abstract

Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 67%

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field

Reyes-Montero

Rubio-Marcos

Fuentes-Cobas

et al. 2021

ACS Appl. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…final draft post-refereeing) of the publication. The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.jallcom.2018.10.060 7 temperature, which is similar to that in previous works [11,27]. The inset of Fig.…”

Section: Introductionsupporting

confidence: 84%

Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: Huge dielectric and piezoelectric nonlinearity

Ochoa

Reyes-Montero

Suñol

et al. 2019

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

The (Ba,Ca)(Zr,Ti)O3 ceramic system has received special attention in recent years because it may lead to promising lead-free piezoceramics. However, the stability of the functional properties of these materials is an important issue that requires greater attention. In this work, the (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 compound (BCZT) is taken as a reference material for evaluating the variation of the functional properties when an external stimulus (e.g., electric field or dynamical stress) is applied, which may constitute an important drawback of piezoceramics. The results show that BCZT exhibits a huge nonlinear behavior, which notably limits this leadfree material for transfer to applications. The instabilities manifest at considerably low amplitudes of the applied electric field or dynamical stress due to a large extrinsic contribution from the irreversible motion of domain walls. Understanding and controlling the physical phenomena related to the domain wall motion presents a fundamental challenge for achieving an effective enhancement of the functional property stability of this system.

show abstract

“…Materials possessing an MPB composition can have a comparatively high piezoelectric coefficient due to the rotational and contractional transitions of domains. , To further investigate the phases of the BCTZ NPs, their Raman spectrum was characterized, as shown in Figure d. The sharp peaks of the E, B 1 (TO+LO) modes at 300 cm –1 ; E, A 1 (TO) modes at 520 cm –1 ; and E, A 1 (LO) modes at 720 cm –1 indicate the existence of a tetragonal phase in the BCTZ NPs. − Note that the discrepancy between the XRD result and the Raman spectrum is caused from the coexistence of multiple phases due to the MPB composition of the BCTZ NPs …”

Section: Resultsmentioning

confidence: 99%

Enhanced Piezoelectric Performance of Composite Fibers Based on Lead-Free BCTZ Ceramics and P(VDF-TrFE) Piezopolymer for Self-Powered Wearable Sensors

Park

Nam

Baek

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Flexible piezoelectric energy harvesters (f-PEHs) have recently become popular alternative power sources for smart and wearable devices. For applications in self-powered wearable devices and biomedical applications, f-PEHs should exhibit high flexibility, nontoxicity, and excellent piezoelectricity. In this study, we developed high-efficiency ultra-f-PEHs based on electrospun piezoelectric composite fiber (PCF) membranes composed of lead-free (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 (BCTZ) nanoparticles (NPs) and poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) fibers. In particular, post-treatments, including post-crystallization and an extra-poling process, were exploited to further enhance the piezoelectricity of the PCFs. The PCF membrane reached an output voltage of 36.5 V, a current signal of 1.09 μA, and an effective output power of 13.2 μW, which are higher compared to the previously reported PCF-based energy harvesters. Furthermore, an ultra-f-PEH consisting of aluminum electrodes, PCF membranes, and polydimethylsiloxane elastomers was proposed and successfully monitored tiny bio-signals, such as carotid pulses, vocalization, and articular bending motions. This study provides suggestions for applications in wearable and biomedical self-powered electronics using piezoelectric energy-harvesting systems.

show abstract

Electric field effect on the microstructure and properties of Ba_0.9Ca_0.1Ti_0.9Zr_0.1O₃ (BCTZ) lead-free ceramics

Abstract: Systematic evaluation of the effect that electric field application has on the structure, microstructure and piezo-ferroelectric properties of barium titanate-based lead-free piezoelectric ceramics reveals a field-induced phase transition underlying its high sensibility.

Cited by 26 publications

References 46 publications

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field

Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: Huge dielectric and piezoelectric nonlinearity

Enhanced Piezoelectric Performance of Composite Fibers Based on Lead-Free BCTZ Ceramics and P(VDF-TrFE) Piezopolymer for Self-Powered Wearable Sensors

Contact Info

Product

Resources

About

Electric field effect on the microstructure and properties of Ba0.9Ca0.1Ti0.9Zr0.1O3 (BCTZ) lead-free ceramics

Abstract: Systematic evaluation of the effect that electric field application has on the structure, microstructure and piezo-ferroelectric properties of barium titanate-based lead-free piezoelectric ceramics reveals a field-induced phase transition underlying its high sensibility.

Cited by 26 publications

References 46 publications

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba0.85Ca0.15Ti0.90Zr0.10O3: Understanding Structural and Microstructural Response to the Electric Field

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba0.85Ca0.15Ti0.90Zr0.10O3: Understanding Structural and Microstructural Response to the Electric Field

Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: Huge dielectric and piezoelectric nonlinearity

Enhanced Piezoelectric Performance of Composite Fibers Based on Lead-Free BCTZ Ceramics and P(VDF-TrFE) Piezopolymer for Self-Powered Wearable Sensors

Contact Info

Product

Resources

About

Electric field effect on the microstructure and properties of Ba_0.9Ca_0.1Ti_0.9Zr_0.1O₃ (BCTZ) lead-free ceramics

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field

Confocal Raman Microscopy, Synchrotron X-ray Diffraction, and Photoacoustic Study of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃: Understanding Structural and Microstructural Response to the Electric Field