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Journal of Materials Science
Erschienen in: Journal of Materials Science 1/2015

01.01.2015 | Original Paper

Microstructural design of neodymium-doped lanthanum–magnesium hexaaluminate synthesized by aqueous sol–gel process

verfasst von: P. Jana, P. S. Jayan, S. Mandal, K. Biswas

Erschienen in: Journal of Materials Science | Ausgabe 1/2015

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Abstract

Aqueous sol–gel processing was used to synthesize neodymium-doped magnesium hexaaluminate (La1−x Nd x MgAl11O19; x = 0, 0.3, 0.4, 0.5) ceramic powder and subsequently calcined at 1450 and 1600 °C for 2 h. Randomly grown platelets of lanthanum–magnesium hexaaluminate formed a porous interlocking structure. Presence of various percentages of neodymium oxide significantly modifies the porous interlocking microstructure into self-reinforced, card-house-like microstructure. Platelets of rare earth-rich magnesium hexaaluminate were grown preferentially more than the stoichiometric rare earth magnesium hexaaluminate at elevated temperature greater than 1450 °C. Rare earth-rich magnesium hexaaluminate platelets form the skeleton of a card-house structure and the tiny platelets of stoichiometric rare earth magnesium hexaaluminate fill the house. The specific heat capacities, micro-hardness, and fracture toughness were studied in details.
Vorheriger Artikel Preparation and characterization of carbon-encapsulated iron nanoparticles and their catalytic activity in the hydrogenation of levulinic acid
Nächster Artikel Evaluation of the effects of treatment factors on the properties of bio-apatite materials

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Metadaten
Titel
Microstructural design of neodymium-doped lanthanum–magnesium hexaaluminate synthesized by aqueous sol–gel process
verfasst von
P. Jana
P. S. Jayan
S. Mandal
K. Biswas
Publikationsdatum
01.01.2015
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 1/2015
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-014-8593-5

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