Results 71 to 80 of about 16,793 (198)

Doping of ZnO with Mn or Co: Two different behaviours for the same synthesis approach

Boletín de la Sociedad Española de Cerámica y Vidrio, 2010
In the last years the research in ZnO has seen a period of intensive work which can be attributed to the new available synthesis methods and characterization techniques. New potential applications have thus emerged for ZnO-based ceramics, provided that a
Peiteado, M.
doaj  

Synthesis of Zinc Ferrites in RF Thermal Plasma Reactor [PDF]

, 2007
Formation of nanosized zinc ferrite spinels was studied from iron- and zinc oxide powders and corresponding nitrate solutions, respectively in a radiofrequency thermal plasma reactor.
Gubicza, Jenő, Gál, L., Mohai, Ilona, Mészáros, I., Szépvölgyi, János   +4 more
core  

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

Influence of the cation substitution on the magnetic properties of LiCo₂O₄ and Li(Me,Co)₂O₄ spinels

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
Lithium-based cells LiCo2O4 have been characterized by magnetic techniques, looking at the influence of the partial substitution of cobalt by 3d or 4d transition metal elements (Fe, Ni, Cu, Cr, Mo).
Gautier, J. L., Meza, E., Guizouarn, T., Bodenez, V., Peña, O.   +4 more
doaj  

Structural Insights into Ni‐Stabilized Fe‐Rich High‐Voltage Spinels: LiNixFe0.5−xMn1.5O4

Small Structures
Fe‐rich high‐voltage spinels are attractive positive electrode materials for next‐generation Li‐ion batteries that offer high resource efficiency and high operating voltages. However, Fe‐rich high‐voltage spinels do not provide stable cycling performance,
Anna Windmüller, Tingting Yang, Kristian Schaps, Anna Domgans, Frederik Zantis, Baolin Wu, Leyela Hassen Adem, Bikila Nagasa Olana, Chih‐Long Tsai, Shicheng Yu, Luc Raijmakers, Hans Kungl, Hermann Tempel, Rafal E. Dunin‐Borkowski, Shawn D. Lin, Mirijam Zobel, Bing Joe Hwang, Rüdiger‐A. Eichel   +17 more
doaj   +1 more source

The temperature dependence investigation of the frequency dispersion of the electrical properties of lithium-iron spinel doped with La, Y

Фізика і хімія твердого тіла
The temperature-frequency dependences of the electrical characteristics of Li2 Fe2,5-x Mex O4 (Ме=La;Y, x=0.01; 0.03; 0.05) spinels synthesized by the «sol-gel» autocombustion technology were obtained by the method of impedance spectroscopy in the ...
A.V. Vakalyuk, I.M. Gasiuk, V.M. Vakalyuk   +2 more
doaj   +1 more source

Chromespinel and Magnetite as Indicators for Recognition of Genesis and History of Serpentinites in Baft Ophiolite Mélange (Kerman Province in Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2013
Baft ophiolite mélange is a part of Naein-Baft ophiolite (southeast of Kerman province in Iran). Serpentinites from Baft ophiolite mélange contain different types of spinels such as chromite, chromespinel, ferritchromite and magnetite which can reveal ...
N. Mohammadi, H. Ahmadipour
doaj  

Thermal Expansion of Electrofused MgO-Based Spinel Systems Containing Fe₂O₃, Al₂O₃-Fe₂O₃, Al₂O₃-Cr₂O₃-Fe₂O₃ and Al₂O₃-NiO-Fe₂O₃

Crystals
Magnesia-spinel multicomponent materials have been used as refractories for a long time. In addition to a few binary systems, the influence of spinel phases on the thermal expansion (α) of MgO or the resulting compound has not been studied so far.
Tilo Zienert, Otávio H. Borges, Victor C. Pandolfelli, Christos G. Aneziris   +3 more
doaj   +1 more source

The Moho as a magnetic boundary [PDF]

Magnetic data are presented for mantle derived rocks: peridtites from St. Pauls rocks, dunite xenoliths from the kaupulehu flow in Hawaii, as well as peridolite, dunite and eclogite xenoliths from Roberts Victor, Dutoitspan, Kilbourne Hole, and San ...
Mayhew, M. A., Thomas, H. H., Wasilewski, P. J.   +2 more
core   +1 more source

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe2O4

Advanced Physics Research
Electron transport via indirect exchange interactions between octahedral sites in spinels is affected by cationic or anionic vacancies. Thus, the deviation of the electron hopping mechanism is investigated, from a constant energy barrier toward a ...
Farshad Farshidfar, Hannah Oreskovic, Dominic H. Ryan, Khashayar Ghandi   +3 more
doaj   +1 more source