Structural study of nano BaTiO3 powder by Rietveld refinement

Kim, Yong‐Il; Jung, Jae Kap; Ryu, Kwon-Sang

doi:10.1016/j.materresbull.2004.03.001

Cited by 65 publications

(35 citation statements)

References 19 publications

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“…This would be undoubtedly connected with the disorder created on the A site of BaTiO 3 as a consequence of La/Na/Eu substitution. Comparing our data to published results by Kchikech and Maglione [34], Lagos et al [35] and Kim et al [36] on the tetragonal BaTiO 3 , we are able to make the following normal mode assignments. For xp0.1, the A 1 transverse optical (TO) modes are observed as broad lines at 250 and 522 cm À1 .…”

Section: Raman Scatteringsupporting

confidence: 83%

Structure refinement, dielectric, pyroelectric and Raman characterizations of Ba1−xLax(1−y)/2Euxy/2Nax/2TiO3 solid solution

Abdelmoula¹,

Khemakhem²,

Simon³

et al. 2006

Journal of Solid State Chemistry

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Section: Raman Scatteringsupporting

confidence: 83%

Structure refinement, dielectric, pyroelectric and Raman characterizations of Ba1−xLax(1−y)/2Euxy/2Nax/2TiO3 solid solution

Abdelmoula¹,

Khemakhem²,

Simon³

et al. 2006

Journal of Solid State Chemistry

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“…As an alternative, Raman spectroscopy is a powerful experimental tool for studying the lattice vibrations and other elementary excitations in materials, providing important information about the structure, composition, strain, defects, and phase transitions. The Raman spectra of the BTO nanoparticles can detect the presence of tetragonal phase of particles as small as those between 20 to 150 nm [10,11].…”

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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“…All the diffraction peaks displayed by the BCT20 powder annealed at 600 1C were related to single-phase BaTiO 3 and this powder was completely indexed on the basis of the tetragonal structure presented in ICDD card no. 05-0626 (P4mm) [2,4,[25][26][27][28]. No other peaks were observed, indicating a complete reaction to form the (Ba 0.8 Ca 0.2 )TiO 3 [14,29,30].…”

Section: Resultsmentioning

confidence: 95%