Phase transformation of BaTiO3 nanoparticles synthesized by RF-plasma CVD

Suzuki, Keigo; Kijima, Kazunori

doi:10.1016/j.jallcom.2005.08.075

Cited by 45 publications

(24 citation statements)

References 22 publications

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“…D XRD and D BET were calculated by the full-width at half-maximum using the Scherrer's equation and the specific surface area [21]. The results of the calculated particle size by XRD and BET similar to the SEM images and PSA results.…”

Section: Resultsmentioning

confidence: 60%

Synthesis of nano-sized antimony-doped tin oxide (ATO) particles using a DC arc plasma jet

Jung

Park

2009

Applied Surface Science

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Section: Resultsmentioning

confidence: 60%

Synthesis of nano-sized antimony-doped tin oxide (ATO) particles using a DC arc plasma jet

Jung

Park

2009

Applied Surface Science

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“…[45][46][47] It has previously been found that for a nanoparticle size range of 30-70nm, which are prepared by radio-frequency plasma chemical vapour deposition, the BaTiO 3 nanoparticles are present in their pseudo-cubic phase. 46 However, Millicent et. al have concluded that the ferroelectric tetragonal phase of BaTiO 3 , which are prepared chemically can be maintained down to 26nm in size.…”

Section: Characterisation Of the Particlesmentioning

confidence: 99%

A comparison between size dependent paraelectric and ferroelectric BaTiO3 nanoparticle doped nematic and ferroelectric liquid crystals

Al-Zangana

Turner

Dierking

2017

Journal of Applied Physics

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The electro-optic and dielectric properties of barium titanate, BaTiO 3 , nanoparticle (NP) doped nematic and ferroelectric liquid crystal materials were examined with respect to different size and concentration of the NPs. Smaller size paraelectric NPs (≈80nm) are compared to larger, ferroelectric NPs (≈240nm). It is found that for concentrations larger than 0.5vol% the ferroelectric NPs exhibit an increasing effect on the electro-optic response of the nematic liquid crystal, which is demonstrated by the enhancement of the dielectric anisotropy. This could be induced by the coupling of the electrical dipole moments in the spherical NPs with the LC director field. The electro-optical properties of the SmC* phase, like tilt angle Θ, switching time and spontaneous polarisation are found to be independent of the concentration and size of the NPs. The rotational viscosity calculated from response times, polarization reversal current and dielectric properties is comparable for all three methods employed and practically independent of particle concentration and size. The relaxation frequency of the Goldstone mode is higher in the ferroelectric NPs suspensions of 2.0vol% as compared to the smaller paraelectric NPs.

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“…Although the expected band structure of a cubic symmetry is single one, according to literature data a certain degree of asymmetry regarding to a highfrequency tail of BaTiO 3 band at ∼550 cm −1 was observed in both, cubic and tetragonal BaTiO 3 . However, it should be noticed that asymmetry in the range close to the top (approximately ∼100 cm −1 around the top of peak), which is usually expressed as a more or less weak and broad shoulder on the higher frequency side, is caused by splitting of the F 1u mode into A 1 and E components and it indicates the occurrence of tetragonal structure [54,55]. In comparison with IR spectra recorded by other authors for BaTiO 3 powder pressed-disk samples [41,51,54], it can be concluded that the spectra in our measurements correspond to tetragonal BaTiO 3 , but with a slightly sustained tetragonal structure in activated samples.…”

Section: Resultsmentioning

confidence: 99%