Ba(Cu0.5W0.5)O3-induced sinterability, electrical and mechanical properties of (Ba0.85Ca0.15Ti0.90Zr0.10)O3 ceramics sintered at low temperature

Chao, Xiaolian; Wang, Zhongming; Tian, Ye; Zhou, Yanzhao; Yang, Zupei

doi:10.1016/j.materresbull.2015.02.022

Cited by 25 publications

(3 citation statements)

References 33 publications

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“…This is because the application of electric field causes the occurrence of polarization switching and domain growth [31]. Also, at domain-switching field or the Ec in P-E loop, a sudden change of surface charge was observed in the sample, leading to a sharp rise of current density (J) [32]. Figure 8(b) shows changes of current density as a function of electric field of 40 kVcm -1 .…”

Section: Field-dependent Ferroelectric P-e Loopmentioning

confidence: 98%

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

et al. 2021

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Large piezoelectric properties was observed in (1-x)BZT-(x)BCT where x=0.5 or Ba0.85Ca0.15Ti0.9Zr0.1O3 (denoted as BCZT), leading to a promising candidate for lead-free piezoelectric materials. However, phase formation of the BCZT is controversial and still unclear since various phase coexistences were identified in the literatures, for instances, the mixed phases of rhombohedral-tetragonal (R-T), ortho-rhombic-tetragonal (O-T) or rhombohedral-orthorhombic-tetragonal (R-O-T). Additionally, it is well known that the crystal structure plays a crucial role on the occurrence of polarization in the piezoceramics. Therefore, this work aims to investigate the coexistence of phase formation at room temperature for the BCZT powder and ceramic. Moreover, the electrical properties as a function of temperature, frequency and electric field were observed in order to evaluate the extrinsic contribution of piezoelectric response. It was found that, according to the results from temperature-dependent dielectric properties as well as Rietveld refinement of XRD profiles, the coexistence of O-T phase was observed in the BCZT powder and ceramic. Furthermore, the enhancement of Ca2+ substitution into Ba2+ site in BCZT ceramic caused the shrinkage of unit cell, leading to the shift of XRD profile and Raman spectra. In addition, it was found that the applications of frequency and electric field can influence on changes of domain-wall motion and micro-polar cluster in the BCZT piezoceramic.

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Section: Field-dependent Ferroelectric P-e Loopmentioning

confidence: 98%

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

et al. 2021

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“…Perovskites like BaTiO3 and PbTiO3 revolutionized the ceramic properties [11]. Bismuth based perovskites, BaTiO3, and other perovskites became good contender for alternatives of PZT ceramics [12].…”

Section: Lead Free Perovskitesmentioning

confidence: 99%

Bulk Lead-Free Piezoelectric Perovskites and their Applications

Rizwan

2022

Materials Research Foundations

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Perovskites are an interesting class of materials that have tremendous applications as actuators, sensors and in photovoltaics. Lead based perovskites exhibit piezoelectricity and other interesting properties and thus have conquered the ceramic industry for a long time. Lead free piezoelectric perovskites are the need of the hour because lead based piezoceramics are toxic and a danger to the environment. There are various contenders of lead free alternatives of lead zirocnate-titnate (PZT) based ceramics including potassium-sodium niobate, barium titanate, bismuth based perovskites that exhibit similar piezoelectric and ferroelectric properties in comparison to PZT ceramics. These lead free piezoceramics and their important properties and respective applications such as sensors, transducers and actuators, is briefly explored in this chapter.

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“…(Ba 0.85 Ca 0.15 )(Zr 0.1 Ce x Ti 0.9-x )O 3 (BCZCT) ceramics were successfully prepared using a solid-state sintering technique, and the observed soft ferroelectric nature of BCZCT was mainly attributed to the reduced crystalline anisotropy of the two phases [20]. Through a conventional solid-state sintering process, (Ba 0.85 Ca 0.15 )(Zr 0.10 Ti 0.90 )O 3 -xBa (Cu 0.5 W 0.5 )O 3 (BCZT-BCW) ceramics were synthesized [21]. The hardness (78 MPa) and fracture toughness (4.7 MPa m 1/2 ) of the ceramics were achieved due to the improved density imparted by BCW additives.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study on the Mechanical Properties of Gd-Doped BCZT Ceramics

Yue,

Fang,

Guo

et al. 2023

Crystals

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Due to their remarkable piezoelectric characteristics, (BaCa)(ZrTi)O3 (BCZT) ceramics exhibit vast potential for being employed in cutting-edge electromechanical apparatus. Extensive experimental studies have been conducted to better meet the practical needs of BCZT-based materials, focusing on their mechanical performance. However, there is a serious lack of research on the theoretical computational aspects. Here, first-principles calculations were utilized to evaluate the mechanical properties of BCZT-xGd ceramics. The structural models were established using the virtual crystal approximation (VCA) method. The investigated compounds demonstrate structural and mechanical strength, as evidenced by their negative formation energies and adherence to the Born stability criteria. Compared to pure BCZT, the substitution of Gd leads to a significant enhancement in the system’s elasticity and stiffness. The BCZT-0.05Gd with B-site doping demonstrates the highest level of Vicker’s hardness (HV), with the noteworthy observation that the inclusion of Gd concomitantly augments its machinability performance. Upon the incorporation of the Gd element, the anisotropic elasticity in the systems gradually transitions into isotropic elasticity, which favors a more uniform stress distribution and consequently reduces sensitivity to the formation and propagation of microcracks. These results indicate that BCZT-xGd exhibits potential for application in electromechanical systems.

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Ba(Cu0.5W0.5)O3-induced sinterability, electrical and mechanical properties of (Ba0.85Ca0.15Ti0.90Zr0.10)O3 ceramics sintered at low temperature

Cited by 25 publications

References 33 publications

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

Investigations on phase coexistence and functional properties of BCZT lead-free piezoceramic

Bulk Lead-Free Piezoelectric Perovskites and their Applications

First-Principles Study on the Mechanical Properties of Gd-Doped BCZT Ceramics

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