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. 100oC. Based on dilatometer data, powders were subsequently densified at 1450oC by hot pressing. Almost аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
Keywords:
Mechanical activation / SEM / Sintering / Spinel / XRD
Source:
Science of Sintering, 2019, 51, 4, 363-376
Publisher:
Međunarodni Institut za nauku o sinterovanju, Beograd
Funding / projects:
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. The authors would like to thank Dr. Miodra
TY - JOUR
AU - Obradović, N.
AU - Fahrenholtz, W.G.
AU - Filipović, Suzana
AU - Corlett, C.
AU - Djordjević, P.
AU - Rogan, J.
AU - Vulić, Predrag J.
AU - Buljak, V.
AU - Pavlović, Vladimir
PY - 2019
UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5150
AB - 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. 100oC. Based on dilatometer data, powders were subsequently densified at 1450oC by hot pressing. Almost аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
PB - Međunarodni Institut za nauku o sinterovanju, Beograd
T2 - Science of Sintering
T1 - Characterization of MgAl2O4 sintered ceramics
EP - 376
IS - 4
SP - 363
VL - 51
DO - 10.2298/SOS1904363O
ER -
@article{
author = "Obradović, N. and Fahrenholtz, W.G. and Filipović, Suzana and Corlett, C. and Djordjević, P. and Rogan, J. and Vulić, Predrag J. and Buljak, V. and Pavlović, Vladimir",
year = "2019",
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. 100oC. Based on dilatometer data, powders were subsequently densified at 1450oC by hot pressing. Almost аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Characterization of MgAl2O4 sintered ceramics",
pages = "376-363",
number = "4",
volume = "51",
doi = "10.2298/SOS1904363O"
}
Obradović, N., Fahrenholtz, W.G., Filipović, S., Corlett, C., Djordjević, P., Rogan, J., Vulić, P. J., Buljak, V.,& Pavlović, V.. (2019). Characterization of MgAl2O4 sintered ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(4), 363-376.
https://doi.org/10.2298/SOS1904363O
Obradović N, Fahrenholtz W, Filipović S, Corlett C, Djordjević P, Rogan J, Vulić PJ, Buljak V, Pavlović V. Characterization of MgAl2O4 sintered ceramics. in Science of Sintering. 2019;51(4):363-376.
doi:10.2298/SOS1904363O .
