Barium Titanate Torus‐Like Particles: Low‐Temperature Synthesis and Formation Mechanism

Maxim, Florentina; Poenaru, Iuliana; Teodorescu, Florina; Tănăsescu, Speranţa

doi:10.1002/ejic.201402497

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…More recently, X. Yang et al 34 described ring-like nanostructures obtained via an aggregation-realignment-fusion process by a sol-gel hydrothermal method. F. Maxim et al 35 explained the formation of BT torus-like nanoparticles from NTO nanotubes and BaCl 2 during hydrothermal synthesis through a Kirkendall diffusion mechanism. But, based on our TEM and SEM observation of the BT nanotori samples (Fig.…”

Section: Nanotori Morphogenesis: the Turing-reaction-diffusionmodelmentioning

confidence: 99%

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

et al. 2015

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A rich variety of single crystalline BaTiO3 (BT) nanostructures have been synthesized by two different routes using titanate nanorods and nanotubes as precursors. Free standing, mixed or agglomerated nanotori, solid or hollow nanospheres and nanocubes were obtained. A careful analysis of the shape evolution of the resulting BT nano-objects obtained with both types of precursors and different parameters (precursor composition and shape, temperature, Ba/Ti molar ratio) allowed an improved understanding of the nanostructure formation. The morphogenesis models at play such as Ostwald ripening and the Kirkendall effect have been identified. Other mechanisms hereafter called the self and merging rebuilding processes and a tentative Turing-reaction-diffusion-model are proposed to explain the formation of these obtained nanoparticles.

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Section: Nanotori Morphogenesis: the Turing-reaction-diffusionmodelmentioning

confidence: 99%

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

et al. 2015

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“…Hence, the torus hole was filled with a solid phase during the heating treatment because it was not thermodynamically stable [22]. It has been suggested earlier that the torus hole was filled up due to the diffusion of low-density crystallites from the torus center to the outside [23]. However, this idea was based on the assumption that the particle growth of BT-PVP occurred via the diffusion of high density crystallites inside the torus to the hole center.…”

mentioning

confidence: 99%

Synthesis of highly disperse tetragonal BaTiO₃ nanoparticles with core–shell by a hydrothermal method

Li¹,

Inukai

Tsuruta³

et al. 2017

Journal of Asian Ceramic Societies

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In order to synthesize of high-dispersion and tetragonal BaTiO 3 (BT) nanoparticle, a hydrothermal method is used in a mixture of chloride metal sources and KOH with polyvinylpyrrolidone (PVP). The properties of BT-PVPs prepared by different reaction temperature and time are investigated via XRD, FE-SEM, DLS, FT-IR, and TEM to clarify the changes of the crystal phase, dispersion, and particle structure. The reaction is finished at 230 • C for 24 h and the critical reaction condition for that the crystal phase of the obtained BT particle changed from the cubic to the tetragonal is found to be 190 • C fixed in reaction time 24 h, and 9 h. During reaction the PVP on the BT surface decomposed to different form, and the PVP plays the role of dispersant in aqueous solution. By the hydrothermal condition of 230 • C for 24 h almost monodisperse BT-PVP with sizes of 83 nm and tetragonality (c/a) of 1.0062 were synthesized. The structure of nanoparticle, core (BT)-shell (PVP) was investigated by FT-IR and direct observed by TEM and the mechanism of particle growth and dispersion was discussed.

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“…This means that a great deal of attention must be turned to the energetic parameters which play an important role in the overall properties and behavior of materials. Exploring the relationships between morphology and thermodynamic properties of nanocrystalline BaTiO 3 , it was shown that the enhancement of the dielectric properties for the BaTiO 3 hydrothermal-prepared powders with 1D morphology, comparatively with nanocubes or hollow-type morphologies, is strongly correlated with the increase in the binding energy of oxygen in the perovskite structure [62,63].…”

Section: Introductionmentioning

confidence: 99%

Introductory Chapter: Structure-Processing-Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

Tănăsescu¹

2020

Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

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Barium Titanate Torus‐Like Particles: Low‐Temperature Synthesis and Formation Mechanism

Cited by 4 publications

References 39 publications

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

Synthesis of highly disperse tetragonal BaTiO₃ nanoparticles with core–shell by a hydrothermal method

Introductory Chapter: Structure-Processing-Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

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Barium Titanate Torus‐Like Particles: Low‐Temperature Synthesis and Formation Mechanism

Cited by 4 publications

References 39 publications

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO3from titanate nanorods and nanotubes

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO3from titanate nanorods and nanotubes

Synthesis of highly disperse tetragonal BaTiO3 nanoparticles with core–shell by a hydrothermal method

Introductory Chapter: Structure-Processing-Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

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Product

Resources

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Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

Morphogenesis mechanisms in the solvothermal synthesis of BaTiO₃from titanate nanorods and nanotubes

Synthesis of highly disperse tetragonal BaTiO₃ nanoparticles with core–shell by a hydrothermal method