Effect of oxygen partial pressure on grain boundary structure and grain growth behavior in BaTiO3

Jung, Yang‐Il; Choi, Si‐Young; Kang, Suk–Joong L.

doi:10.1016/j.actamat.2006.02.025

Cited by 126 publications

(118 citation statements)

References 28 publications

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“…This is in contrast to barium titanate, where the polycrystalline matrix grains underlie P crit and hence do not grow [30,32,59]; at the same time single crystalline seeds can overcome P crit due to their higher driving force and grow rapidly [30,32,33]. In the present results both single crystals and polycrystals grow (certainly at very different mobilities).…”

Section: Exaggerated Grain Growth In Srtiocontrasting

confidence: 74%

“…Another possibility is given by the theory of nucleation barriers, which was mostly developed based on barium titanate [30][31][32][59][60][61][62]. The authors assume an energetic barrier (''nucleation barrier'') for facetted grain boundaries, which represents the energy needed to create a nucleus on a facetted boundary plane for moving the grain boundary.…”

Section: Drag Effects On Grain Growthmentioning

confidence: 99%

See 1 more Smart Citation

Growth of single crystalline seeds into polycrystalline strontium titanate: Anisotropy of the mobility, intrinsic drag effects and kinetic shape of grain boundaries

Rheinheimer

Bäurer²,

Handwerker

et al. 2015

Acta Materialia

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Section: Exaggerated Grain Growth In Srtiocontrasting

confidence: 74%

Section: Drag Effects On Grain Growthmentioning

confidence: 99%

Growth of single crystalline seeds into polycrystalline strontium titanate: Anisotropy of the mobility, intrinsic drag effects and kinetic shape of grain boundaries

Rheinheimer

Bäurer²,

Handwerker

et al. 2015

Acta Materialia

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“…[3][4][5] It has been known that the electric properties and microstructures of those perovskite materials were strongly dependent on the oxygen partial pressure, indicating that defects play an essential role to bring about their properties. [6][7][8][9][10][11][12] Thus, an understanding of defect energetics is indispensable for further developing and applications of these perovskite oxides.…”

Section: Introductionmentioning

confidence: 99%

First Principles Study on Intrinsic Vacancies in Cubic and Orthorhombic CaTiO<SUB>3</SUB>

et al. 2009

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The structural relaxations and the formation energies of intrinsic defects in cubic and orthorhombic CaTiO 3 were investigated by a first principles projector-augmented wave method. It was found that cations and oxygen vacancies in both phases cause extra levels near the valence band maximum and the conduction band minimum, respectively, and the Ti-vacancy induced level in orthorhombic CaTiO 3 is closer to the valence band maximum than that in cubic CaTiO 3 . Among the neutral defect species, including neutral isolated vacancy, partial Schottky, and full Schottky, it was found that the V Ca 2À þ V O 2þ and V O 0 are the most preferable defect species for orthorhombic CaTiO 3 under reduction and oxidization conditions, respectively, whereas the V Ca 2À þ V O 2þ partial Schottky is always stable in any atmosphere in cubic CaTiO 3 . As compared to cubic CaTiO 3 , it was found that orthorhombic CaTiO 3 shows higher defect formation energies.

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“…5, 654-660USA) was also fabricated (Cell_B). The anodes were fired at 1,400°C for 5 h. The porosity, average particle size and particle size distribution on a fracture surface were measured from the Feret's mean diameter using an image analysis program (Matrox Inspector 2.1) [19][20][21].…”

Section: Original Research Papermentioning

confidence: 99%

Electrochemical Performance of a Ni and YSZ Composite Synthesised by Ultrasonic Spray Pyrolysis as an Anode for SOFCs

et al. 2011

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The electrochemical performance of an anode material for a solid oxide fuel cell (SOFC) depends highly on microstructure in addition to composition. In this study, a NiO–yttria‐stabilised zirconia (NiO–YSZ) composite with a highly dispersed microstructure and large pore volume/surface area has been synthesised by ultrasonic spray pyrolysis (USP) and its electrochemical characteristics has been investigated. For comparison, the electrochemical performance of a conventional NiO–YSZ is also evaluated. The power density of the zirconia electrolyte‐supported SOFC with the synthesised anode is ∼392 mW cm–2 at 900 °C and that of the SOFC with the conventional NiO–YSZ anode is ∼315 mW cm–2. The improvement is ∼24%. This result demonstrates that the synthesised NiO–YSZ is a potential alternative anode material for SOFCs fabricated with a zirconia solid electrolyte.

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Effect of oxygen partial pressure on grain boundary structure and grain growth behavior in BaTiO3

Cited by 126 publications

References 28 publications

Growth of single crystalline seeds into polycrystalline strontium titanate: Anisotropy of the mobility, intrinsic drag effects and kinetic shape of grain boundaries

Growth of single crystalline seeds into polycrystalline strontium titanate: Anisotropy of the mobility, intrinsic drag effects and kinetic shape of grain boundaries

First Principles Study on Intrinsic Vacancies in Cubic and Orthorhombic CaTiO<SUB>3</SUB>

Electrochemical Performance of a Ni and YSZ Composite Synthesised by Ultrasonic Spray Pyrolysis as an Anode for SOFCs

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