Formation mechanism and characteristics of lanthanum-doped BaTiO3 powders and ceramics prepared by the sol–gel process

Ianculescu, Adelina; Vasilescu, C; Crışan, Maria; Răileanu, Mina; Vasile, Bogdan Ştefan; Calugaru, Mihai; Crışan, D.; Drăgan, Nicolae; Curecheriu, Lavinia; Mitoşeriu, Liliana

doi:10.1016/j.matchar.2015.05.022

Cited by 54 publications

(11 citation statements)

References 61 publications

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“…2(d)). This composition-dependent evolution of microstructure, demonstrating the inhibiting effect of the solute on the grain growth process, is similar to that one reported for other homovalently-or aliovalently-substituted BaTiO 3 -based ceramics [28,29,31,32]. The microstructural features (density, grain size, grain distribution, etc.)…”

Section: Microstructuresupporting

confidence: 86%

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Ianculescu

Pintilie

Vasilescu

et al. 2016

Ceramics International

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Section: Microstructuresupporting

confidence: 86%

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Ianculescu

Pintilie

Vasilescu

et al. 2016

Ceramics International

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“…The FE-SEM image of the ceramic sample with low cerium content obtained after conventional sintering at 1300 • C/4 h (BCT-005_CS) shows a fine-grained, homogeneous microstructure consisting of polyhedral, well-faceted grains (with truncated edges and corners) uniform in shape and size and with a small amount of intergranular porosity (Figure 7a). An average grain size <GS> of 1.167 µm (Table 2, Figure 7b), lower than the 5 µm reported in the case of sol-gel La 3+ -doped BaTiO 3 ceramics of similar composition and sintered under similar conditions [10], was estimated in this case.…”

Section: Microstructurecontrasting

confidence: 49%

“…It is well known that A-site donor doping in BaTiO 3 involving the incorporation of larger rare-earth ions such as La 3+ and Nd 3+ [6][7][8][9][10][11][12] in the perovskite lattice is more effective in shifting the Curie temperature toward lower values than the effect induced by homovalent species such as Sr 2+ and Ca 2+ [13][14][15][16][17]. The content of donor dopant also exhibits a complicated influence on the electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sintering Strategy on the Characteristics of Sol-Gel Ba1−xCexTi1−x/4O3 Ceramics

et al. 2019

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Single-phase Ce3+-doped BaTiO3 powders described by the nominal formula Ba1−xCexTi1−x/4O3 with x = 0.005 and 0.05 were synthesized by the acetate variant of the sol-gel method. The structural parameters, particle size, and morphology are strongly dependent on the Ce3+ content. From these powders, dense ceramics were prepared by conventional sintering at 1300 °C for 2 h, as well as by spark plasma sintering at 1050 °C for 2 min. For the conventionally sintered ceramics, the XRD data and the dielectric and hysteresis measurements reveal that at room temperature, the specimen with low cerium content (x = 0.005) was in the ferroelectric state, while the samples with significantly higher Ce3+ concentration (x = 0.05) were found to be in the proximity of the ferroelectric–paraelectric phase transition. The sample with low solute content after spark plasma sintering exhibited insulating behavior, with significantly higher values of relative permittivity and dielectric losses over the entire investigated temperature range relative to the conventionally sintered sample of similar composition. The spark-plasma-sintered Ce-BaTiO3 specimen with high solute content (x = 0.05) showed a fine-grained microstructure and an almost temperature-independent colossal dielectric constant which originated from very high interfacial polarization.

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“…The sample presented a diffraction pattern consistent with the cubic phase (no peak splitting of the tetragonal phase could be detected) and various nonidentified peaks of low intensity. The cubic BaTiO 3 phase has also been obtained at lower calcination temperatures using a conventional sol-gel procedure [31,32].…”

Section: Resultsmentioning

confidence: 99%

An Eco-Friendly Method of BaTiO₃ Nanoparticle Synthesis Using Coconut Water

Gomes

Magalhães

Paschoal

et al. 2018

Journal of Nanomaterials

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BaTiO 3 nanoparticles were successfully synthesized by a new coconut water-based sol-gel method using Ba(CH 3 COO) 2 and TiCl 3 as the starting salts. The influence of the amount of coconut water and calcination conditions on the barium titanate crystallization was investigated. The resulting nanoparticles were characterized by thermogravimetric and differential thermal analysis, X-ray diffraction, scanning electron microscopy, and Raman and Fourier transform infrared (FTIR) spectroscopies. The ferroelectric tetragonal single phase of BaTiO 3 was obtained in samples prepared with a ratio of coconut water volume (mL)/BaTiO 3 mass (g) of 25 : 2 and 30 : 2, calcined at 1100°C, which was confirmed by XRD measurements. Crystallites with an average size of about 31 nm for both samples were obtained, and microscopy images revealed the presence of particles in the range of 40 to 60 nm. Raman and FTIR spectra confirmed the dominant tetragonal phase of BaTiO 3 , meanwhile traces of BaCO 3 were identified in FTIR spectra.

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Formation mechanism and characteristics of lanthanum-doped BaTiO3 powders and ceramics prepared by the sol–gel process

Cited by 54 publications

References 61 publications

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Influence of Sintering Strategy on the Characteristics of Sol-Gel Ba1−xCexTi1−x/4O3 Ceramics

An Eco-Friendly Method of BaTiO₃ Nanoparticle Synthesis Using Coconut Water

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Formation mechanism and characteristics of lanthanum-doped BaTiO3 powders and ceramics prepared by the sol–gel process

Cited by 54 publications

References 61 publications

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

Influence of Sintering Strategy on the Characteristics of Sol-Gel Ba1−xCexTi1−x/4O3 Ceramics

An Eco-Friendly Method of BaTiO3 Nanoparticle Synthesis Using Coconut Water

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Product

Resources

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An Eco-Friendly Method of BaTiO₃ Nanoparticle Synthesis Using Coconut Water