The fabrication of nanocrystalline BaTiO3 ceramics under high temperature and high pressure

Xiao, C. J.; Chen, Jin; Wang, X.H.

doi:10.1016/j.jmatprotec.2008.04.069

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…1. It is indicated that the as-prepared BMT samples consist of a single phase with a tetragonal structure of BaTiO 3 , consistent with the literature [22][23]. No peaks of impurities were detected from the patterns.…”

Section: Resultssupporting

confidence: 87%

“…Consequently, many efforts have been paid to develop titanium-containing photocatalysts with high activities for environmental applications and/or water splitting such as Zn x Ti y O w-z N z [14], Bi 12 TiO 20 [17][18], Bi 2 Ti 2 O 7 [19], Bi 20 TiO 32 [20], and Bi 4 Ti 3 O 12 [21], etc. Barium titanate (BaTiO 3 , BTO) is one of the most widely used ferroelectric materials and has been extensively studied [22][23]. In recent years, BTO has attracted extensively interests for organics photocatalytic degradation due to its narrow band gap (E g < 3.0 eV) [24].…”

Section: Introductionmentioning

confidence: 99%

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Controllable Synthesis and Photocatalytic Activity of Ba0.6Mg0.4TiO3 Particles with Different Morphologies

Liu

Zhao

Lin

2014

AMR

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Ba0.6Mg0.4TiO3 (BMT) particles with different morphologies were synthesized through hydrothermal method and their optical and photocatalytic properties were investigated. Their crystal structure and microstructures were characterized using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). XRD patterns demonstrate that the as-prepared samples are tetragonal structure. FESEM shows that BMT crystals can be fabricated in different morphologies by simply manipulating the reaction parameters of hydrothermal process. The UV-visible diffuse reflectance spectra (UV-vis DRS) reveal that the band gaps of BMT photocatalysts are about 2.37 - 2.51 eV. The as-prepared BMT photocatalysts exhibite higher photocatalytic activities in the degradation of methyl orange (MO) under visible light irradiation (λ > 420 nm) compared with traditional N-doped TiO2 (N-TiO2) and pure BaTiO3 (BTO). The high photocatalytic performance of BMT photocatalysts could be attributed to the recombination restraint of the e-/h+ pairs resulting from doping of Mg2+ ions. The influence of morphologies upon the photocatalytic properties of BMT was studied. Furthermore, BMT nanowires reveal the highest photocatalytic activity. Up to 94.0% MO is decolorized after visible light irradiation for 360 min.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis and Photocatalytic Activity of Ba0.6Mg0.4TiO3 Particles with Different Morphologies

Liu

Zhao

Lin

2014

AMR

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“…It is known that good densification of ceramics with nano‐sized grains by classical sintering methods is difficult . Only high‐pressure assisted sintering, combined sintering methods, spark plasma sintering, and two‐step sintering proved to be valuable methods to produce nearly full dense nanoceramics. The insets in the bottom right corner of the SEM images (Fig.…”

Section: Resultsmentioning

confidence: 99%

Grain Size‐Dependent Properties of Dense Nanocrystalline Barium Titanate Ceramics

et al. 2012

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The grain size influence on the dielectric relaxation and nonlinear dielectric properties of BaTiO 3 ceramics with grain size in the range of (92Ä936) nm densified by Spark Plasma Sintering (SPS) from ultrafine powders were investigated. The progressive reduction of the Curie temperature and of the effective permittivity results from a combination of intrinsic size effects and low-permittivity grain boundary layer. A model of dielectric cylindrical cavities was employed in order to calculate intrinsic effective permittivity values in GHz range. An interesting feature is the presence of a thermally activated Debyelike relaxation in the ferroelectric state of ceramics with grain size above 300 nm, with activation energies of 0.45-0.49 eV, which seems to be related to the domain walls forced motion under the applied field. By diminishing grain size, a progressive reduction of the ferroelectric nonlinear character was obtained, reaching a macroscopic non-switching character and a linear permittivity versus field dependence for the finest ceramics (grain size of 90-100 nm) until very high values of the applied field. The observed behavior supports the idea of frozen polarization induced by pinning centers as due to a large number of grain boundaries and charged defects in the fine structures.

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“…Thus, it will result in the growth of grains and the occurrence of micro-defects. [21] Besides, it can also be observed that inside of the white defects there are a large number of the BLT grains growing faster than those outside (Fig. 7).…”

Section: Resultsmentioning

confidence: 84%

Lanthanum-doped Bi ₄ Ti ₃ O ₁₂ ceramics prepared by high-pressure technique

et al. 2010

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The fabrication of nanocrystalline BaTiO3 ceramics under high temperature and high pressure

Cited by 10 publications

References 14 publications

Controllable Synthesis and Photocatalytic Activity of Ba<sub>0.6</sub>Mg<sub>0.4</sub>TiO<sub>3</sub> Particles with Different Morphologies

Controllable Synthesis and Photocatalytic Activity of Ba<sub>0.6</sub>Mg<sub>0.4</sub>TiO<sub>3</sub> Particles with Different Morphologies

Grain Size‐Dependent Properties of Dense Nanocrystalline Barium Titanate Ceramics

Lanthanum-doped Bi ₄ Ti ₃ O ₁₂ ceramics prepared by high-pressure technique

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The fabrication of nanocrystalline BaTiO3 ceramics under high temperature and high pressure

Cited by 10 publications

References 14 publications

Controllable Synthesis and Photocatalytic Activity of Ba<sub>0.6</sub>Mg<sub>0.4</sub>TiO<sub>3</sub> Particles with Different Morphologies

Controllable Synthesis and Photocatalytic Activity of Ba<sub>0.6</sub>Mg<sub>0.4</sub>TiO<sub>3</sub> Particles with Different Morphologies

Grain Size‐Dependent Properties of Dense Nanocrystalline Barium Titanate Ceramics

Lanthanum-doped Bi 4 Ti 3 O 12 ceramics prepared by high-pressure technique

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Lanthanum-doped Bi ₄ Ti ₃ O ₁₂ ceramics prepared by high-pressure technique