Abstract
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. The aim of this study was to examine phase composition, microstructure, and densification behavior of sintered specimens. After sintering in dilatometer at 1500 °C, the powder was converted to single phase MgAl2O4. The results show that mechanical activation improved the densification behavior of MgAl2O4 sintered specimens, and it reduced the onset temperature for sintering by approx. 100°C. Based on dilatometer data, powders were subsequently densified at 1450°C by hot pressing. Almost all specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
Recommended Citation
N. Obradovic et al., "Characterization of MgAl₂O₄ Sintered Ceramics," Science of Sintering, vol. 51, no. 4, pp. 363 - 376, International Institute for the Science of Sintering (IISS), Apr 2019.
The definitive version is available at https://doi.org/10.2298/SOS1904363O
Department(s)
Materials Science and Engineering
Keywords and Phrases
Mechanical activation; SEM; Sintering; Spinel; XRD
International Standard Serial Number (ISSN)
0350-820X; 1820-7413
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2019 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Apr 2019
Comments
This investigation was supported by the Serbian Ministry of Education, Science and Technological Development of the Republic of Serbia, and it was conducted under the following projects: OI 172057, and III 45007.