Results 11 to 20 of about 120,946 (348)

Post-spinel transformations and equation of state in ZnGa2O4: Determination at high-pressure by in situ x-ray diffraction [PDF]

open access: yes, 2009
Room temperature angle-dispersive x-ray diffraction measurements on spinel ZnGa2O4 up to 56 GPa show evidence of two structural phase transformations.
D. Errandonea   +8 more
core   +2 more sources

Mechanical Behavior of Transparent Spinel Fabricated by Spark Plasma Sintering

open access: yesCeramics, 2023
In this work, a transparent nanostructured ceramic magnesium aluminate spinel (MgAl2O4) was fabricated by Spark Plasma Sintering (SPS) from commercial spinel nano-powders at different temperatures (1300, 1350 and 1400 °C).
Khadidja Hoggas   +6 more
doaj   +1 more source

Data for photoluminescence spectra of natural Cr3+-doped MgAl2O4 spinel during order-disorder transition

open access: yesData in Brief, 2020
Photoluminescence (PL) spectra of natural Cr3+ doped MgAl2O4 spinel from Tanzania were taken during its order-disorder transition (ODT) process. Samples were changed their disordered degree by quenching treatment.
Chengsi Wang, Andy H. Shen, Yungui Liu
doaj   +1 more source

Manganese ferrite thin films Part I: Preparation and structure [PDF]

open access: yes, 1972
The preparation of manganese ferrite thin films by the reactive evaporation of oxidic materials is reported. The process is not critical and provides homogeneous mirror-like films with spinel structure.
Berg, K.G. van den   +2 more
core   +2 more sources

Cluster expansion of multicomponent ionic systems with controlled accuracy: Importance of long-range interactions in heterovalent ionic systems [PDF]

open access: yes, 2014
We have been examining factors determining the accuracy of cluster expansion (CE), which is used in combination with many density functional theory (DFT) calculations.
Seko, Atsuto, Tanaka, Isao
core   +2 more sources

Characterization Study of an Oxide Film Layer Produced under CO2/Steam Atmospheres on Two Different Maraging Steel Grades

open access: yesMetals, 2021
Currently, surface treatments lead to inducing a superficial layer of several nanometers up to micrometer, which in some cases can be protective.
Mauro Andres Cerra Florez   +7 more
doaj   +1 more source

Mössbauer characterisations and magnetic properties of iron cobaltites CoxFe3−xO4 (1 ≤ x ≤ 2.46) before and after spinodal decomposition [PDF]

open access: yes, 2013
Iron cobaltite powders CoxFe3_xO4 (1 ≤ x ≤ 2.46) were synthesized with compositions in between the cobalt errite CoFe2 O4 and Co2.46Fe0.54O4. The cationic distribution of pure spinel phases was determined by Mossbauer spectroscopy: as Co content ...
Barnabé, Antoine   +5 more
core   +4 more sources

Oxidation Behavior of Maraging 300 Alloy Exposed to Nitrogen/Water Vapor Atmosphere at 500 °C

open access: yesMetals, 2021
Aging heat treatments in maraging steels are fundamental to achieve the excellent mechanical properties required in several industries, i.e., nuclear, automotive, etc. In this research, samples of maraging 300 alloy were aged using a novel procedure that
Mauro Andres Cerra Florez   +7 more
doaj   +1 more source

Hydrogen production by methanol steam reforming on NiSn/MgO-Al 2O3 catalysts: The role of MgO addition [PDF]

open access: yes, 2011
The effect of the magnesia loading on the surface structure and catalytic properties of NiSn/MgO-Al2O3 catalysts for hydrogen production by methanol steam reforming has been investigated. The catalysts have been obtained by impregnation of γ-Al2O3 by the
Bobadilla Baladrón, Luis Francisco   +7 more
core   +1 more source

Fluidization behavior of redox metal oxide and spinel particles to develop high-energy-density thermal energy storage system for concentrated solar power applications

open access: yesJournal of Thermal Science and Technology, 2022
Solar thermochemical energy storage systems, utilize the entire spectrum of solar radiation to drive endothermic chemical reactions, have received great interest in concentrated solar power applications during the past years.
Genta TSURUMAKI   +8 more
doaj   +1 more source

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