Development of Magnesium Aluminate (MgAl2O4) Nanoparticles for refractory crucible application.

Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE

Original Publication: San Francisco, CA : Public Library of Science

Aluminum Oxide* ; Nanoparticles* ; Aluminum Compounds* ; Magnesium Compounds*; Magnesium Oxide

Competing Interests: The authors have declared that no competing interests exist.
Ceramics are the oxides of metals and nonmetals with excellent compressive strength. Ceramics usually exhibit inert behavior at high temperatures. Magnesium aluminate (MgAl2O4), a member of the ceramic family, possesses a high working temperature up to 2000°C, low thermal conductivity, high strength even at elevated temperatures, and good corrosion resistance. Moreover, Magnesium Aluminate Nanoparticles (MANPs) can be used in the making of refractory crucible applications. This study focuses on the thermal behavior of Magnesium Aluminate Nanoparticles (MANPs) and their application in the making of refractory crucibles. The molten salt method is used to obtain MANPs. The presence of MANPs is seen by XRD peaks ranging from 66° to 67°. The determination of the smallest crystallite size of the sample is achieved by utilizing the Scherrer formula and is found to be 15.3 nm. The SEM micrographs provided further information, indicating an average particle size of 91.2 nm. At 600°C, DSC curves show that only 0.05 W/g heat flows into the material, and the TGA curve shows only 3% weight loss, which is prominent for thermal insulation applications. To investigate the thermal properties, crucibles of pure MANPs and the different compositions of MANPs and pure alumina are prepared. During the sintering, cracks appear on the crucible of pure magnesium aluminate. To explore the reason for crack development, tablets of MgAl2O4 are made and sintered at 1150°C. Ceramography shows the crack-free surfaces of all the tablets. Results confirm the thermal stability of MANPs at high temperatures and their suitability for melting crucible applications.
(Copyright: © 2024 Khan et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Oct 15;131:329-34. (PMID: 24835935)
Polymers (Basel). 2021 Jan 12;13(2):. (PMID: 33445424)
Polymers (Basel). 2021 Apr 15;13(8):. (PMID: 33921061)

0 (spinell)
11137-98-7 (aluminum magnesium oxide)
LMI26O6933 (Aluminum Oxide)
3A3U0GI71G (Magnesium Oxide)
0 (Aluminum Compounds)
0 (Magnesium Compounds)

Date Created: 20240116 Date Completed: 20240118 Latest Revision: 20240118

20250114

PMC10790984

10.1371/journal.pone.0296793

38227597