Preparation and properties of porous BaTiO3 nanostructured ceramics produced from cuboidal nanocrystals

Lukacs, Vlad Alexandru; Caruntu, Gabriel; Condurache, Oana; Ciomaga, Cristina Elena; Curecheriu, Lavinia; Padurariu, Leontin; Ignat, Maria; Airimioaei, Mirela; Stoian, George; Rotaru, Aurelian; Mitoşeriu, Liliana

doi:10.1016/j.ceramint.2021.03.128

Cited by 18 publications

(4 citation statements)

References 72 publications

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“…When the temperature is higher than the TC, the relative permittivity of ferroelectric ceramics reduces according to the Curie-Weiss law. 23,[119][120][121] The Curie temperature is an important parameter for ferroelectric ceramics and it represents a limit of operation for ferroelectric devices, and there have been various studies focused on the impact of porosity of the Curie temperature. Zhang et al fabricated porous BCZT ceramics by the burnt-out polymer spheres method.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Porous ferroelectric materials for energy technologies: current status and future perspectives

Yan

Xiao

et al. 2021

Energy Environ. Sci.

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Section: Dielectric Propertiesmentioning

confidence: 99%

Porous ferroelectric materials for energy technologies: current status and future perspectives

Yan

Xiao

et al. 2021

Energy Environ. Sci.

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“…Such modifications are reported in Refs. [19, 24–26, 28–30], in which authors demonstrated experimentally and by theoretical simulations that the internal stress is proportional with the material Young modulus and presents a decrease with the increasing porosity level. This shift could also be associated with possible chemical inhomogeneity due to issues during the synthesis process, resulting in a nonuniform distribution of cations within the crystal lattice.…”

Section: Resultsmentioning

confidence: 99%

“…The sintering treatment at 1500 • C for 2 h promotes the formation of the Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 perovskite phase in ceramics without any detectable secondary phases. Previous works indicated an influence of porosity in inducing structural modifications in BaTiO 3 ceramics 19,24,25 and in its solid solutions. 8,26 In particular, BCTZ with nominal composition around MPB is expected to show phase coexistence, and the phase compositions are influenced by microstructural factors such as grain size and porosity level.…”

Section: Phase Characterizationmentioning

confidence: 99%

Porosity effect on the functional properties and energy harvesting performance of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃ ceramics

Horchidan,

Curecheriu,

Lukacs

et al. 2023

J Am Ceram Soc.

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In this study, the effect of porosity on the structural and functional (dielectric, ferroelectric, nonlinear, and piezoelectric) properties in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics was investigated. Various levels of microporosity in the range of 3% to 31 vol.% have been produced using poly(methyl methacrylate) microspheres as sacrificial templates. The structural investigation indicates a phase coexistence, as expected for this composition at room temperature. The maximum permittivity decreases with increasing porosity, from around 7000 (ceramic with 3 vol.% porosity) down to 3500 (ceramic with 31 vol.% porosity), and the Curie temperature shifts from 47 to 67°C when increasing porosity, related to the possible porosity‐induced structural and internal stress modifications. An enhanced piezoelectric response was found in the Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramic with intermediate porosity around 18 vol.%, with the highest value of piezoelectric response of 470 pC/N and a figure of merit of 7.3 pm2/N. The optimum piezoelectric properties at the intermediate porosity level are related to the microstructural changes (pore shape and connectivity) and possible field‐induced structural modifications. The piezoelectric energy harvesting measurement results have shown the possibility of using Pb‐free porous ferroelectric materials in devices for energy harvesting applications.

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“…The presence of local inhomogeneity and disorder in the material strongly inhibits the long-range ordering of polar dipoles and further results in small polar regions that are guided by the local polar field of the doped cation and adopt the local dipolar ordering. This is evidenced by a significant departure in dielectric behavior on the temperature scale from the well-defined Curie-Weiss (C-W) characteristic [3,16,17]. Ferroelectrics with relaxor characteristics are desirable for modern sensors, actuators, highfrequency electromechanical transducers and other applications, e.g.…”

Section: Introductionmentioning

confidence: 99%

Optimization of energy storage and electrocaloric performance in Pb(Zr,Ti)O₃ via A-Site La and Bi Co-doping

Kumar,

Malhotra,

Nishu

et al. 2024

Smart Mater. Struct.

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Lead based ferroelectrics are the most fascinating candidates in the field of state-of-art electronic technology. Their intriguing properties are further enriched via realization of morphotropic phase boundaries. Moreover, A-site chemical substitution insights about the emergence of various exotic phases. Here, we employ the co-doping of La3+ and Bi3+ at A-site of Pb(Zr,Ti)O3 (PZT) ferroelectric to broaden the practical perspective of relaxor system. Here, we emphasize that A-site co-doping approach introduces the technologically – appealing amendments in the well-established temperature – composition phase diagram of PZT system. La3+ and Bi3+ doping favors the evolution of novel response against the thermal and field fluctuation. We employ the electro-caloric characteristics and Arrott plot as probing tool. The observation of negative electrocaloric effect and systematic reversal of Arrott lines, followed by poling effect on dielectric constant, discloses the emergence of ergodic phase as a novel phase, which further reveals that the Bi doping approach convinces the emergence of exotic characteristics in chemically modified PZT system.

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Preparation and properties of porous BaTiO3 nanostructured ceramics produced from cuboidal nanocrystals

Cited by 18 publications

References 72 publications

Porous ferroelectric materials for energy technologies: current status and future perspectives

Porous ferroelectric materials for energy technologies: current status and future perspectives

Porosity effect on the functional properties and energy harvesting performance of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃ ceramics

Optimization of energy storage and electrocaloric performance in Pb(Zr,Ti)O₃ via A-Site La and Bi Co-doping

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Preparation and properties of porous BaTiO3 nanostructured ceramics produced from cuboidal nanocrystals

Cited by 18 publications

References 72 publications

Porous ferroelectric materials for energy technologies: current status and future perspectives

Porous ferroelectric materials for energy technologies: current status and future perspectives

Porosity effect on the functional properties and energy harvesting performance of Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics

Optimization of energy storage and electrocaloric performance in Pb(Zr,Ti)O3 via A-Site La and Bi Co-doping

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Product

Resources

About

Porosity effect on the functional properties and energy harvesting performance of Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃ ceramics

Optimization of energy storage and electrocaloric performance in Pb(Zr,Ti)O₃ via A-Site La and Bi Co-doping