Results 11 to 20 of about 4,525 (206)

Characterization of MgAl2O4 sintered ceramics [PDF]

Science of Sintering, 2019
Single phase MgAl2O4 was made from a one-to-one molar ratio of MgO and Al2O3 powders mixed using ball-milling. Mixtures of MgO and Al2O3 were subsequently treated in planetary ball mill for 30, 60, 90 and 120 minutes in air.
Obradović Nina, Fahrenholtz William G., Filipović Suzana, Corlett Cole, Đorđević Pavle, Rogan Jelena, Vulić Predrag J., Buljak Vladimir, Pavlović Vladimir   +8 more
doaj   +20 more sources

Síntese do espinélio MgAl2O4 via "sol-gel" Synthesis of MgAl2O4 spinel via "sol-gel"

Cerâmica, 2005
O espinélio aluminato de magnésio MgAl2O4 é um material que apresenta uma combinação de propriedades de grande interesse tecnológico, tais como alto ponto de fusão (2135 ºC), alta resistência ao ataque químico e ao choque térmico, baixa constante ...
A. L. Heck, S. R. Taffarel, R. Hoffmann, U. L. Portugal Jr., S. L. Jahn, E. L. Foletto   +5 more
doaj   +3 more sources

Synthesis, characterization and thermal behaviour of Fe0.65Co0.35-MgAl2O4 and Fe0.65Ni0.35-MgAl2O4 nanocomposite powders [PDF]

Journal of Materials Chemistry, 1997
Fe0.65Co0.35-MgAl2O4 and Fe0.65Ni0.35-MgAl2O4 nanocomposite powders are prepared by selective hydrogen reduction of monophasic oxide solid solutions synthesized by combustion in urea. The alloy particles, which are dispersed in the spinel matrix, are about 10 nm in size.
Quénard, Olivier, De Grave, Eddy, Laurent, Christophe, Rousset, Abel   +3 more
openaire   +5 more sources

Synthesis of MgO Doped with CoO/MgAl2O4, NiO/MgAl2O4, and CuO/MgAl2O4 in a Single Pot for Efficient Dye Adsorption

Inorganics
A simple method employing dextrose as a capping agent was adopted for making MgAl2O4@MgO (AM), 5%NiO-MgAl2O4@MgO (AMNi), 5%CoO-MgAl2O4@MgO (AMCo), and 5%CuO-MgAl2O4@MgO (AMCu) nanocomposites. The average particle sizes, determined via SEM, were in the range of 21.6–51.4 nm, 9.8–13.8 nm, 19.1–32.2 nm, and 9.2–31.2 nm for AM, AMCu, AMNi, and AMCo ...
Salah H. Elhory, Tarig G. Ibrahim, Mohamed R. Elamin, Faisal K. Algethami, Mohamed S. Eltoum, Babiker Y. Abdulkhair, Mutaz Salih   +6 more
openaire   +2 more sources

Effect of microporous Al2O3–MgAl2O4 content on the thermal shock resistance and molten steel purification performance of β-SiC whisker-reinforced Al2O3–MgAl2O4–C ceramic filters

Journal of Materials Research and Technology
This study investigates the effect of microporous Al2O3–MgAl2O4 content on the phase composition, microstructures, mechanical properties, and purification performance for molten steel of Al2O3–MgAl2O4–C filters, conducted through XRD, SEM, EDS, immersion
Jinwen Song, Wen Yan, Olena Volkova, Stefan Andrä, Matheus Roberto Bellé, Lukas Neubert, Can Tian, Yuanbing Li   +7 more
doaj   +2 more sources

Studies on Mn3O4MgAl2O4 system

Journal of Inorganic and Nuclear Chemistry, 1975
Structural, electrical and magnetic properties of solid solutions of tetragonal Mn3O4 (c/a>1) and cubic MgAl2O4 over the whole composition range have been investigated. All the samples were found to be monophasic and exhibited either tetragonal or cubic symmetry at room temperature/ Tetragonal-cubic transition appeared to be of the first order ...
KEER, HV, BODAS, MG, BHADURI, A, BISWAS, AB   +3 more
openaire   +3 more sources

Raman study of MgAl2O4–CoAl2O4 and MgAl2O4–MgCr2O4 solid solutions

, 2015
Spinels are very important minerals in terrestrial and extraterrestrial rocks as well as materials of high relevance from a gemological and technological point of view for their remarkable physical properties. Ten synthetic spinels belonging to the MgAl2O4– CoAl2O4 and to the MgAl2O4–MgCr2O4 solid solutions have been studied by Raman spectroscopy to ...
D’Ippolito, V., Andreozzi, G. B., BERSANI, Danilo, LOTTICI, Pier Paolo   +3 more
openaire   +4 more sources

Defects on the Surface of Ti-Doped MgAl2O4 Nanophosphor [PDF]

Nanoscale Research Letters, 2017
Ti-doped nano MgAl2O4 for white emission was synthesized by combustion method. Extrinsic Schottky defects, Al vacancies and Ti4+ dopant in Al sites, which are considered to be responsible for bluish-white emission, were observed by STEM on the surface of
Jaehyuk Lim, Yongseon Kim, Sungdae Kim, Youngwoon Kim, Shinhoo Kang   +4 more
doaj   +2 more sources

Morphological and structural characterization of MgAl2O4 spinel [PDF]

Science of Sintering, 2023
Magnesium aluminate has the spinel structure along with good mechanical, chemical, and thermal properties. Magnesium aluminate has a wide range of applications including refractory ceramics, optically transparent ceramic windows, and armors.
Nina Obradovic, Suzana Filipovic, William Fahrenholtz, Bojan Marinkovic, Jelena Rogan, Steva Levic, Antonije Djordjevic, Vladimir Pavlovic   +7 more
openaire   +5 more sources

Modeling the sintering trajectories of MgAl2O4 Spinel [PDF]

Scripta Materialia, 2021
Abstract Controlling microstructure and density of MgAl2O4 spinel is a crucial step in the elaboration of industrial ceramics products. Understanding the sintering characteristics is a key issue to optimize the mechanical and optical properties. In this paper, Olevsky's sintering model is used to simulate the sintering trajectories of spinel.
Kerbart, Gabriel, Harnois, Christelle, Marinel, Sylvain, Manière, Charles   +3 more
openaire   +2 more sources