Results 51 to 60 of about 119,992 (349)

Structural properties of Mn-substituted hercynite

Nukleonika, 2017
In this work spinel series with the general formula Fe1-xMnxAl2O4 (where x = 0, 0.3, 0.5 and 0.7) were synthesized and characterized with respect to their structure and microstructure. X-ray diffractometry (XRD) was used to identify the phase composition
Jastrzębska Ilona, Bodnar Wiktor, Witte Kerstin, Burkel Eberhard, Stoch Paweł, Szczerba Jacek   +5 more
doaj   +1 more source

Thermodynamic Properties of MgAl₂O₄ Spinel at High Temperatures and High Pressures

Crystals, 2023
Thermodynamic properties of MgAl2O4 spinel are significant in understanding the phase relations of the Earth’s crust and upper mantle, but available values from experimental measurements are limited at ambient pressure conditions to date.
Wuxueying Qiu, Chang Su, Yonggang Liu, Wei Song   +3 more
doaj   +1 more source

On the Balance of Intercalation and Conversion Reactions in Battery Cathodes

, 2018
We present a thermodynamic analysis of the driving forces for intercalation and conversion reactions in battery cathodes across a range of possible working ion, transition metal, and anion chemistries.
Canepa, Pieremanuele, Ceder, Gerbrand, Gautam, Gopalakrishnan Sai, Hannah, Daniel C.   +3 more
core   +1 more source

Mafic alkaline metasomatism in the lithosphere underneath East Serbia: evidence from the study of xenoliths and the host alkali basalts [PDF]

, 2010
Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks.
Cvetkovic, V., Downes, Hilary, Hock, V., Lazarov, M., Prelevic, D.   +4 more
core   +1 more source

High‐Entropy Perovskite Nanofibers for Bifunctional Air Electrodes in Reversible Protonic Ceramic Electrochemical Cells

Advanced Functional Materials, EarlyView.
High‐entropy perovskite nanofibers serve as robust and active bifunctional air electrodes in reversible protonic ceramic electrochemical cells. Their compositional complexity stabilizes the lattice, enriches oxygen vacancies, and accelerates surface exchange.
Hyeonggeun Kim, Incheol Jeong, Seeun Oh, Dongyeon Kim, Kang Taek Lee   +4 more
wiley   +1 more source

Thermogravimetric and magneticproperties of Ni1-X Zn xFe2O4 nanoparticles synthesized by coprecipitation

Materials Research, 2009
Ni1-xZn xFe2O4 (x = 0 to 1) nanoparticles of size less than 9 nm were prepared by a chemical coprecipitation method which could be used for ferrofluid preparation.
Kandasamy Velmurugan, Vellaiyappan Sangli Karuppanan Venkatachalapathy, Sechassalom Sendhilnathan   +2 more
doaj   +1 more source

Phase-Pure Epitaxial b-Axis-Oriented Bronze TiO₂ Films

Applied Sciences, 2022
We demonstrate the heteroepitaxial growth of phase-pure bronze-phase TiO2 films using pulsed laser deposition on MgAl2O4 single-crystal substrates. While the growth on cubic substrates with smaller lattice parameters favors the stabilization of an out-of-
Andreas Herklotz, Frank Herklotz, Florina Stefania Rus   +2 more
doaj   +1 more source

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source

Algebra de Clifford del espacio tiempo

Momento, 1990
En un artículo previo, presentamos la estructura y relaciones básicas del algebra de Clifford Gn generada por el producto geométrico de los vectores de un espacio vectorial Vn sobre el cuerpo de los reales en la versión moderna de Hestenes. Este artículo
Ma. Carolina Spinel G.
doaj  

Investigation of Vanadium-Containing Sludge Oxidation Roasting Process for Vanadium Extraction

Metals, 2021
Vanadium containing sludge is a by-product of vanadium pentoxide obtained by hydrometallurgical methods from vanadium slag that can be estimated as a promising technogeneous raw material for vanadium production.
Ulyana Kologrieva, Anton Volkov, Dmitry Zinoveev, Irina Krasnyanskaya, Pavel Stulov, Dmitry Wainstein   +5 more
doaj   +1 more source