Results 161 to 170 of about 1,463 (216)

Disorder‐Driven Ionic Mobility Edge and Localization‐Driven Dendrite Formation in Solid Electrolytes

Advanced Energy Materials, EarlyView.
Migration‐barrier disorder localizes ionic transport into a sparse percolation backbone. Current and electric‐field focusing at filament tips promote fractal dendrite growth and suppress the critical current density according to jcrit = j0 exp(−σEeff/kBT).
Dongwook Lee, Jiwon Seo
wiley   +1 more source

Facilitated Phase Transformation for Improved Performance of Earth‐Abundant Disordered Rocksalt Materials

Advanced Energy Materials, EarlyView.
As demand for Li‐ion batteries grows, Mn‐rich disordered rocksalt (DRX) oxides offer a sustainable, low‐cost alternative to scarce Ni and Co. During cycling, Mn‐rich DRX materials transform into a partial spinel‐like phase (𝛿) that improves rate capability and capacity.
Han‐Ming Hau, Zijian Cai, Shilong Wang, Xinye Zhao, Krishna Prasad Koirala, Tzu‐Yang Huang, Yingzhi Sun, Xiaochen Yang, Lu Ma, Jianming Bai, Bryan D. McCloskey, Chongmin Wang, Gerbrand Ceder   +12 more
wiley   +1 more source

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Expansion during the reaction sintering of PZT

Ceramurgia International, 1980
Abstract Expansion during the reaction sintering of PZT from PT and PZ constituents was studied at different molar ratios, for different particle sizes, and different temperatures: compositional and particle size effects were observed. The expansion is related to the size of the PT particles present and exhibits a maximum at 50 mole% PT for equal ...
Yoshikazu Nakamura, Sudhir S. Chadratreya, Richard M. Fulrath   +2 more
openaire   +1 more source

Reaction sintering: correlation between densification and reaction

Journal of Materials Science, 1979
By studying simultaneous densification kinetics and reaction kinetics during the sintering and hot pressing of alumina-zircon mixtures, it has been possible to distinguish between the particle rearrangement and particle reshaping (diffusive) stages of the densification process. Particle rearrangement is found to be more significant during hot pressing (
E. Di Rupo, M. R. Anseau, R. J. Brook
openaire   +1 more source

Reaction Sintered LiAlON

2008
Recent results suggest that Li + can substitute for Al 3+ in the gamma-AlON structure. LiAl 5 O 8 is isostructural with gamma-AlON above 1290°C after it goes through an ordered-disordered phase transformation and has a similar lattice parameter. A previous study showed the benefits of reaction sintering LiAlON starting with LiAl 5 O 8 as compared ...
Raymond A. Cutler, R. Marc Flinders
openaire   +1 more source

Reaction Sintering of Uranium Monocarbide

Transactions of the Indian Ceramic Society, 1975
High density (95% theoretical) single-phase uranium monocarbide has been fabricated by warm pressing a mixture of suitably sized dicarbide and uranium metal powders at 800°C at 675 kg/cm2 for 5 minutes and by subsequent sintering at 600°-1000°C. The high density and the single phase structure could be retained upto 1800°C, though some grain growth ...
B. D. Zope, V. K. Moorthy
openaire   +1 more source

Hydrothermal reaction sintering of monoclinic zirconia

1989
A dense monoclinic zirconia ceramic having a maximum density of 5.85 g/cm3 and grains of 1–5 µm has been prepared from Zr metal powder and water in a Pt capsule by hydrothermal reaction sintering at 1000°C for 3 h under 98 MPa. The effects of temperatures, pressures, and initial compositions on the densification and sintering were studied. The reaction
Masahiro Yoshimura, Shigeyuki Sômiya
openaire   +1 more source

Sintering Reactions of Zinc Oxide

Journal of Applied Physics, 1959
The sintering of zinc oxide spheres has been studied in the temperature range 700 to 900°C in air, oxygen, helium, and hydrogen. Fresh zinc oxide sinters rapidly in air and oxygen, but it does not sinter appreciably in helium in the same temperature range.
V. J. Lee, G. Parravano
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Reactions for Hydrothermal Reaction Sintering

1990
Metal powders or chips were reacted with high temperature and high pressure solution to form oxides under certain hydrothermal conditions.
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Synthesis of hercynite by reaction sintering

Journal of the European Ceramic Society, 2011
Abstract Hercynite was synthesized by a reaction sintering method using industrial alumina, mill scale, and carbon black as starting materials in the presence of nitrogen and solid carbon at high temperatures. Phase and microstructure changes during the synthesis were investigated. The specimen sintered at 1450 °C consisted of hercynite (FeO·Al 2 O 3
Junhong Chen, Lingyan Yu, Jialin Sun, Yong Li, Wendong Xue   +4 more
openaire   +1 more source