Microstructure and Electrical Properties of Niobium Doped Barium Titanate Ceramics

Dechakupt, Tanawadee; Tangsritrakul, Jirapa; Ketsuwan, P.; Yimnirun, Rattikorn

doi:10.1080/00150193.2011.577386

Cited by 31 publications

(9 citation statements)

References 14 publications

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“…)-and acceptor (Fe 3? )doped BaTiO 3 [43][44][45][46][47][48][49][50] are also deposited and contrasted to stoichiometric BaTiO 3 , revealing oxygen vacancy concentration-dependent variations in the thermal expansion response. In particular, the influence of oxygen partial pressure of the carrier gas during deposition and during annealing was specifically considered to help distinguish between internal defect redistribution and oxygen reincorporation.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

et al. 2022

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The room temperature aerosol deposition method is especially promising for the rapid deposition of ceramic thick films, making it interesting for functional components in energy, mobility, and telecommunications applications. Despite this, a number of challenges remain, such as an enhanced electrical conductivity and internal residual stresses in as-deposited films. In this work, a novel technique that integrates a sacrificial water-soluble buffer layer was used to fabricate freestanding ceramic thick films, which allows for direct observation of the film without influence of the substrate or prior thermal treatment. Here, the temperature-dependent chemical and structural relaxation phenomena in freestanding BaTiO3 films were directly investigated by characterizing the thermal expansion properties and temperature-dependent crystal structure as a function of oxygen partial pressure, where a clear nonlinear, hysteretic contraction was observed during heating, which is understood to be influenced by lattice defects. As such, aliovalent doping and atmosphere-dependent annealing experiments were used to demonstrate the influence of local chemical redistribution and oxygen vacancies on the thermal expansion, leading to insight into the origin of the high room temperature conductivity of as-deposited films as well as greater insight into the influence of the induced chemical, structural, and microstructural changes in room temperature deposited functional ceramic thick films. Graphical abstract

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Section: Graphical Abstract Introductionmentioning

confidence: 99%

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

et al. 2022

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“…Conversely, doping with Nb 5+ in the Ti-site has a significant role in microstructure and electrical properties. T. Dechakupt et al 20 have considered the microstructure and electrical properties of niobium-doped barium titanate ceramics. They have revealed that the grain size becomes uniform and reduces as the niobium concentration increases, and also that the dielectric constant increased as the amount of Nb increases.…”

Section: Introductionmentioning

confidence: 99%

Structural and morphological studies, and temperature/frequency dependence of electrical conductivity of Ba_0.97La_0.02Ti_1−xNb_4x/5O₃ perovskite ceramics

et al. 2021

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“…For instance: (1) Hf 4+ substituted BTO presents a smaller grain size [ 68 ], but also high porosity [ 52 ], leading to an overall reduction in ε r ; (2) Nb 5+ substituted BTO ceramics showed a small and uniform microstructure due to better diffusion of Nb 5+ into the BTO grains inhibiting the abnormal grain growth. Also, microstructural density was improved by the introduction of Nb 5+ that ultimately led to enhanced ε r [ 69 ].…”

Section: Tuning Energy Density By Chemical Substitutionmentioning

confidence: 99%

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

et al. 2020

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Electrical energy storage systems (EESSs) with high energy density and power density are essential for the effective miniaturization of future electronic devices. Among different EESSs available in the market, dielectric capacitors relying on swift electronic and ionic polarization-based mechanisms to store and deliver energy already demonstrate high power densities. However, different intrinsic and extrinsic contributions to energy dissipations prevent ceramic-based dielectric capacitors from reaching high recoverable energy density levels. Interestingly, relaxor ferroelectric-based dielectric capacitors, because of their low remnant polarization, show relatively high energy density and thus display great potential for applications requiring high energy density properties. In this study, some of the main strategies to improve the energy density properties of perovskite lead-free relaxor systems are reviewed, including (i) chemical modification at different crystallographic sites, (ii) chemical additives that do not target lattice sites, and (iii) novel processing approaches dedicated to bulk ceramics, thick and thin films, respectively. Recent advancements are summarized concerning the search for relaxor materials with superior energy density properties and the appropriate choice of both composition and processing routes to match various applications’ needs. Finally, future trends in computationally-aided materials design are presented.

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Microstructure and Electrical Properties of Niobium Doped Barium Titanate Ceramics

Cited by 31 publications

References 14 publications

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

Structural and morphological studies, and temperature/frequency dependence of electrical conductivity of Ba_0.97La_0.02Ti_1−xNb_4x/5O₃ perovskite ceramics

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

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Microstructure and Electrical Properties of Niobium Doped Barium Titanate Ceramics

Cited by 31 publications

References 14 publications

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

Room temperature deposition of freestanding BaTiO3 films: temperature-induced irreversible structural and chemical relaxation

Structural and morphological studies, and temperature/frequency dependence of electrical conductivity of Ba0.97La0.02Ti1−xNb4x/5O3 perovskite ceramics

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

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Structural and morphological studies, and temperature/frequency dependence of electrical conductivity of Ba_0.97La_0.02Ti_1−xNb_4x/5O₃ perovskite ceramics