Results 51 to 60 of about 1,867 (215)

Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics [PDF]

, 2020
Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that
Pavlović, Vladimir B., Filipović, Suzana, Blagojevic, Vladimir, Fahrenholtz, William G., Blagojević, Vladimir A., Đorđević, Antonije, Pavlovic, Vladimir, Marković, Smilja, Lević, Steva, Fahrenholtz, William, Djordjević, Antonije, Dordevic, Antonije, Obradović, Nina, Savić, Slobodan   +13 more
core   +1 more source

Magnesite-rich mining tailings as a raw material for refractory ceramics – microstructural and thermal analysis; pp. 145–149 [PDF]

Proceedings of the Estonian Academy of Sciences, 2019
In this paper, we present results of a study about the possibilities of utilizing talc ore mining tailings as a refractory raw material aiming at magnesium aluminate MgAl2O4 spinel composition.
Marjaana Karhu, Juha Lagerbom, Soili Solismaa, Elina Huttunen-Saarivirta   +3 more
doaj   +1 more source

Analyses of the Deformability and Chemistry of Non‐Metallic Inclusions in QT Steels With Increased Recycling‐Induced Tramp Element Content

steel research international, EarlyView.
This work uses high‐temperature dilatometry to examine how the tramp elements Cu, Ni, and Sn affect the deformability of non‐metallic inclusions and matrix in quench‐and‐temper steel. Mg‐bearing inclusions deform less than Mg‐free ones. Copper lowers formability. Nickel increases deformability.
Julian Cejka, Isabell Gruber, Gerald Klösch, Susanne Katharina Michelic   +3 more
wiley   +1 more source

THE OPTICAL SPECTRA OF Co2+ IN MgAl2O4 SPINEL

, 1991
The spectroscopic properties of MgAl2O4 spinel doped by Co2+ ions are characterized by low ligand fields strength.
P.J. DEREN, I. TRABJERG, W. STREK, B . JEZOWSKA-TRZEBIATOWSKA   +3 more
core   +1 more source

New Magnetite Reference Material for SIMS δ18O Measurements and a Study of Precision and Accuracy Due to Crystal Orientation Effects

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 391-406, June 2026.
Key Points A new magnetite reference material (PF21mt) is available for δ18O measurements by SIMS. Reproducibility of measurement results in two laboratories suggest orientation bias of ±2‰ (2s) at 20 keV. Repeatability improves to ±1‰ (2s) when using a 13 keV protocol, suggesting reduced orientation bias. In situ isotope ratio measurements provide the
Michelle Ulrich, Daniela Rubatto, Maria Rosa Scicchitano, Benita Putlitz, Thomas Bovay   +4 more
wiley   +1 more source

Structural and Microstructural Study on the Arc-Plasma Synthesized (APS) FeAl2O4–MgAl2O4 Transitional Refractory Compound

High Temperature Materials and Processes, 2017
In this work, a pleonastic compound, a compound with a composition between hercynite and spinel sensu stricto FeAl2O4–MgAl2O4, was synthesized by a non-conventional method of arc-plasma synthesis (APS).
Jastrzębska Ilona, Jacek Szczerba, Paweł Stoch   +2 more
doaj   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, Volume 28, Issue 10, 20 May 2026.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Use photoluminescence of Cr3+ as a local probe for order-disorder transition process in MgAl2O4 spinel

, 2019
Natural Cr3+ doped MgAl2O4 spinel samples were quenched and annealed at several temperatures.
Wang, C
core   +2 more sources

Large magnetocapacitance beyond 420% in epitaxial magnetic tunnel junctions with an MgAl2O4 barrier

Scientific Reports, 2022
Magnetocapacitance (MC) effect has been observed in systems where both symmetries of time-reversal and space-inversion are broken, for examples, in multiferroic materials and spintronic devices.
Kenta Sato, Hiroaki Sukegawa, Kentaro Ogata, Gang Xiao, Hideo Kaiju   +4 more
doaj   +1 more source

V centers in MgAl2O4 spinels.

Physical review. B, Condensed matter, 1991
V centers induced by ionizing irradiation at 80 or 300 K in single-crystal and polycrystalline MgAl2O4 samples have been studied by use of electron paramagnetic resonance and optical absorption. Vt- and Vo2- centers, as a result of hole trapping at tetrahedral and octahedral cation vacancies, respectively, have been found to be responsible for two EPR ...
Ibarra, A., López, F. J., Jiménez de Castro, Miguel   +2 more
openaire   +2 more sources