Solid-State and Surface Spectroscopic Characterization of BaTiO3 Fine Powders

Busca, Guido; Buscaglia, Vincenzo; Leoni, M.; Nanni, Paolo

doi:10.1021/cm00043a016

Cited by 179 publications

(126 citation statements)

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“…Busca et al [12] reported a distortion of the TiO 6 octahedron in the cubic BTO phase inducing a pseudotetragonality of the cubic phase. This could explain the significantly lower symmetry with respect to a cubic perovskite structure, similar to that of the tetragonal BTO.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Fuentes

Céspedes

Muñoz

et al. 2013

J. Chil. Chem. Soc.

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Barium titanate (BaTiO 3 ) powders with particle sizes about 50 nm in diameter were synthesized using a hydrothermal route. The powders were characterized using various experimental techniques such as XRD, TEM and Raman spectroscopy, and they showed a good crystallinity and homogeneity without heat treatments. Also, Raman spectra showed the presence of the tetragonal phase. In addition, various calcination treatments were made to BaTiO 3 powders with the purpose to improve their ferroelectric properties. In general, calcination treatments improved the crystallinity and homogeneity of the samples considerably but did not modify the internal structure of the BaTiO 3 , which was observed in the Raman spectra. On the other hand, from theoretical calculations were established that the cubic phase should be better dielectric in comparison with the tetragonal phase, but this latter would have better optical properties. However, experimental evidences are indicative that the cubic phase would predominate in the synthesis of the compound.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Fuentes

Céspedes

Muñoz

et al. 2013

J. Chil. Chem. Soc.

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“…in the case of cation ordering in corundum-type structures 9 and in the detection of tetragonal domains in pseudocubic perovskites. 10 In contrast, the characterization of supported oxides, which are frequently in the form of supported 'monolayers,' is less easy, because they escape diffraction methods. For this reason, spectroscopic methods such as IR and Raman, but also UV-vis, 11 ESR 12 and 51 V NMR, 13 are needed to obtain complete information on the structure of the active phases.…”

Section: Introductionmentioning

confidence: 99%

Differentiation of mono‐oxo and polyoxo and of monomeric and polymeric vanadate, molybdate and tungstate species in metal oxide catalysts by IR and Raman spectroscopy

Busca

2002

J Raman Spectroscopy

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160

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The expected and experimental features of vanadate, molybdate and tungstate species observed in inorganic compounds of different structures are discussed. In particular, fourfold coordinated species (truly tetrahedral and distorted tetrahedral), isolated and polymeric mono-oxo and dioxo metallyl species are discussed. On these bases, some of the data concerning surface species in oxide-supported oxides are also considered. The need to perform both IR and Raman experiments and, if possible, O-18/O-16 exchange experiments is also emphasized. Copyright (C) 2002 John Wiley Sons, Ltd

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“…35 The band at about 726 cm À1 has been observed in the tetragonal phase of BZT-0.5BCT and is related to the highest frequency longitudinal optical mode (LO) A1 symmetry and E (LO). [36][37][38] The peak at 305 cm À1 attributed to the B1 mode is a characteristic peak for BZT-0.5BCT and indicates the asymmetry of the TiO 6 octahedra. 39,40 This band is considered to be the Raman signature of the tetragonal phase.…”

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Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti_0.8Zr_0.2)O₃–x(Ba_0.7Ca_0.3)TiO₃thin films

et al. 2013

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A lead-free piezoelectric material with ultra-high properties, Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3(BZTxBCT) nanocrystals was synthesized via a sol-gel method, and the corresponding thin films were also deposited on Pt/Ti/SiO2/Si substrates by a spin-coating approach. The BZT-xBCT thin film exhibited a high remnant polarization of 22.15 mC cm2 with a large coercive field of 68.06 kV cm1. The resultant gel is calcined at various elevated temperatures and studied with FTIR/XRD/Raman/DSC-TGA/AFM/SEM techniques for gel composition, crystallization, phase transition, thermochemistry and the morphology of the film. Although the room temperature crystal structure of the BZT-xBCT nanocrystals appears to be a standard perovskite structure by conventional X-ray diffraction (XRD), Raman spectroscopy demonstrates the presence of non-centrosymmetric regions arising from the off-centering of the titanium (zirconium) atoms.The Raman spectra findings demonstrate the degree by which the tetragonal phase grows with the increase of calcining temperature in BZT-0.5BCT, and the characteristic ferroelectric-ferroelectric phase transition in BZT-xBCT while going through the MPB process. The structural and constituent evolution for the conversion process from gel to ceramic, as well as the formation mechanism of the BZT-0.5BCT crystallite, were also elucidated.Keywords gel, synthesized, ba, ti0, 8zr0, 2, crystallization, o3, ferroelectric, x, ba0, 7ca0, 3, tio3, thin, films, evolution, phase, properties, sol Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsWang, Z., Zhao, K., Guo, X., Sun, W., Jiang, H., Han, X., Tao, X., Cheng, Z., Zhao, H., Kimura, H., Yuan, G., Yin, J. & Liu, Z. (2013). Crystallization, phase evolution and ferroelectric properties of sol-gel-synthesized Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3 thin films. Journal of Materials Chemistry C, 1 522-530. AuthorsZeng-mei Wang, Kuan Zhao, Xin-li Guo, Wei Sun, Hua-long Jiang, Xue-qin Han, Xu-tang Tao, Zhen-xiang Cheng, Hong-yang Zhao, Hideo Kimura, Guo-liang Yuan, Jiang Yin, and Zhi-guo Liu nanocrystals was synthesized via a sol-gel method, and the corresponding thin films were also deposited on Pt/Ti/SiO 2 /Si substrates by a spin-coating approach. The BZT-xBCT thin film exhibited a high remnant polarization of 22.15 mC cm À2 with a large coercive field of 68.06 kV cm À1 . The resultant gel is calcined at various elevated temperatures and studied with FTIR/XRD/Raman/DSC-TGA/AFM/SEM techniques for gel composition, crystallization, phase transition, thermochemistry and the morphology of the film. Although the room temperature crystal structure of the BZT-xBCT nanocrystals appears to be a standard perovskite structure by conventional X-ray diffraction (XRD), Raman spectroscopy demonstrates the presence of non-centrosymmetric regions arising from the off-centering of the titanium (zirconium) atoms. The Raman spectra findings demonstrate the degree by which the tetragonal phase grows with the increase of calcining temperature in BZT-0.5BCT, and the...

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Solid-State and Surface Spectroscopic Characterization of BaTiO3 Fine Powders

Cited by 179 publications

References 0 publications

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Differentiation of mono‐oxo and polyoxo and of monomeric and polymeric vanadate, molybdate and tungstate species in metal oxide catalysts by IR and Raman spectroscopy

Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti_0.8Zr_0.2)O₃–x(Ba_0.7Ca_0.3)TiO₃thin films

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Solid-State and Surface Spectroscopic Characterization of BaTiO3 Fine Powders

Cited by 179 publications

References 0 publications

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Synthesis and Structural Characterization of Nanocrystalline Batio3 at Various Calcination Temperatures

Differentiation of mono‐oxo and polyoxo and of monomeric and polymeric vanadate, molybdate and tungstate species in metal oxide catalysts by IR and Raman spectroscopy

Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti0.8Zr0.2)O3–x(Ba0.7Ca0.3)TiO3thin films

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Crystallization, phase evolution and ferroelectric properties of sol–gel-synthesized Ba(Ti_0.8Zr_0.2)O₃–x(Ba_0.7Ca_0.3)TiO₃thin films