Results 71 to 80 of about 5,714 (305)

Colouring mechanisms in natural spinels

open access: yes, 2014
Natural minerals belonging to the spinel group are actively sought as gemstones because of their intense multi-colour, high mechanical resistance and high thermal and chemical stability.
D'IPPOLITO, VERONICA   +2 more
core  

The Influence of Mesoscale Particle Structure on the Electrode Degradation and Resultant Electrochemistry of Lithium Ion Cells With Nickel Rich Lithium Nickel Manganese Cobalt Oxide Positive Electrodes

open access: yesAdvanced Materials Technologies, EarlyView.
Milled polycrystalline NMC811 cathode (MPC NMC) with smaller secondary particle and higher surface area had 1) greater cathode tortuosity, 2) reduced surface Ni on the cycled MPC cathodes consistent with surface reconstruction, and 3) increased Ni deposition from cathode‐anode crosstalk, manifesting in lower functional capacity and higher impedance ...
Edelmy J. Marin Bernardez   +22 more
wiley   +1 more source

Origin of the Fangmayu Chromite Deposit, Miyun, Beijing: Constraints from Electron Microprobe Analyses of Cr-Spinel

open access: yesYankuang ceshi, 2015
Stratiform chromite deposits in China have long been considered to form by fractional crystallization of mafic magma. However, some researchers recently proposed that some chromite deposits are also hosted in ophiolite.
LI Li-xing   +3 more
doaj   +1 more source

STRUCTURE OF THE IRON - CHROME SPINELS

open access: yes, 1958
X-ray diffraction intensity measurements and saturation magnetic moment measurements were made on several samples of the spinel system FeFeQ Cr O n , 0 ^ x ^ 2, cl X H* for the purpose of finding the details in the structure of this system which were ...
DERBYSHIRE, WILLIAM DAVIS
core  

ZnO-based spinels grown by electrodeposition [PDF]

open access: yes, 2012
We report on the synthesis of thin films of ZnCo 2O 4 and ZnMn 2O 4 spinels, as well as pure Co 3O 4 and Mn 3O 4 spinels, by means of electrodeposition. Spinel thin films have been analyzed by energy dispersive spectroscopy, X-ray diffraction, and Raman ...
Marí, B.   +3 more
core   +1 more source

When Cubic is Not Isotropic: Phonon–Exciton Decoupling in CuInSnS4 Single Crystals

open access: yesAdvanced Optical Materials, EarlyView.
A cubic CuInSnS4 crystal does not fully play by cubic rules. While phonons follow the average iso‐tropic lattice symmetry, the disorder‐localized excitons break away, showing strong, and reproduci‐ble polarization‐dependent emission. This work shows how intrinsic cation disorder can turn a mac‐roscopically cubic material into a source of hidden ...
Lara Kim Linke   +11 more
wiley   +1 more source

Sustainable Materials Design With Multi‐Modal Artificial Intelligence

open access: yesAdvanced Science, EarlyView.
Critical mineral scarcity, high embodied carbon, and persistent pollution from materials processing intensify the need for sustainable materials design. This review frames the problem as multi‐objective optimization under heterogeneous, high‐dimensional evidence and highlights multi‐modal AI as an enabling pathway.
Tianyi Xu   +8 more
wiley   +1 more source

Low Temperature Anharmonicity in the Superconducting Spinels [PDF]

open access: yes
Strong comparisons between the properties of the high transition temperature superconductors in the β- tungsten and NbN groups and the superconducting spinels are described within the framework of present theories of high Tc superconductivity.
Dawes, Paul P.
core  

(Table 4) Geochemistry of spinels, at DSDP Hole 83-504B

open access: yes, 1985
(Table 4) Geochemistry of spinels, at DSDP Hole 83 ...
Dungan, Michael A   +11 more
core   +1 more source

Magnetoelectric Nanoparticle‐Based Wireless Brain–Computer Interface: Underlying Physics and Projected Technology Pathway

open access: yesAdvanced Science, EarlyView.
Magnetoelectric nanoparticles (MENPs) enable fully wireless, minutely invasive neuromodulation, and potentially neural recording, by converting magnetic into electric and, conversely, electric into magnetic fields, respectively, at high spatiotemporal resolution.
Elric Zhang   +14 more
wiley   +1 more source

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