Combustion Synthesis of Magnesium Aluminate

Journal Article · Thu Oct 20 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3643682· OSTI ID:21612028

Kale, M A ^[1]; Joshi, C P ^[2]; Moharil, S V ^[3]

---

1. Physics Department, S.V.S.S. College of Engineering and Research, Nagpur 4411 10 (India)
2. Physics Department, Ramdeobaba Engineering College, Katol Road, Nagpur 440 013 (India)
3. Physics Department, RTM Nagpur University, Nagpur, 440033 (India)

In the system MgO-Al{sub 2}O{sub 3}, three compounds MgAl{sub 2}O{sub 4}, MgAl{sub 6}O{sub 10}(also expressed as-Mg{sub 0.4}Al{sub 2.4}O{sub 4}) and MgAl{sub 26}O{sub 40} are well known. Importance of the first two is well established. Magnesium aluminate (MgAl{sub 2}O{sub 4}) spinel is a technologically important material due to its interesting thermal properties. The MgAl{sub 2}O{sub 4} ceramics also find application as humidity sensors. Apart from the luminescence studies, the interest in MgAl{sub 2}O{sub 4} is due to various applications such as humidity-sensing and PEM fuel cells, TL/OSL dosimetry of the ionizing radiations, white light source. Interest in the MgAl{sub 6}O{sub 10} has aroused due to possible use as a substrate for GaN growth. Attempt was made to synthesize these compounds by the combustion synthesis using metal nitrates as oxidizer and urea as a fuel. Compounds MgAl{sub 2}O{sub 4} and MgAl{sub 6}O{sub 10} were formed in a single step, while MgAl{sub 26}O{sub 40} was not formed by this procedure. Activation of MgAl{sub 6}O{sub 10} by rare earth ions like Ce{sup 3+}, Eu{sup 3+} and Tb{sup 3+} and ns{sup 2} ion Pb{sup 2+} could be achieved. Excitation bands for MgAl{sub 6}O{sub 10} are at slightly shorter wavelengths compared to those reported for MgAl{sub 2}O{sub 4}.

• OSTI ID: 21612028
• Journal Information: AIP Conference Proceedings, Vol. 1391, Issue 1; Conference: OPTICS 2011: International conference on light - Optics: phenomena, materials, devices, and characterization, Calicut, Kerala (India), 23-25 May 2011; Other Information: DOI: 10.1063/1.3643682; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
ALUMINIUM OXIDES
CERAMICS
CERIUM IONS
COMBUSTION
CRYSTAL GROWTH
EUROPIUM IONS
EXCITATION
GALLIUM NITRIDES
LEAD IONS
LUMINESCENCE
MAGNESIUM OXIDES
NITRATES
PROTON EXCHANGE MEMBRANE FUEL CELLS
SPINELS
SUBSTRATES
SYNTHESIS
TERBIUM IONS
THERMODYNAMIC PROPERTIES
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
EMISSION
ENERGY-LEVEL TRANSITIONS
FUEL CELLS
GALLIUM COMPOUNDS
IONS
MAGNESIUM COMPOUNDS
MINERALS
NITRIDES
NITROGEN COMPOUNDS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTON EMISSION
PHYSICAL PROPERTIES
PNICTIDES
SOLID ELECTROLYTE FUEL CELLS
THERMOCHEMICAL PROCESSES