Characterization of MgAl2O4 sintered ceramics

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...

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Published inScience of sintering Vol. 51; no. 4; pp. 363 - 376
Main Authors Obradovic, Nina, Fahrenholtz, William, Filipovic, Suzana, Corlett, Cole, Djordjevic, Pavle, Rogan, Jelena, Vulic, Predrag, Buljak, Vladimir, Pavlovic, Vladimir
Format Journal Article
LanguageEnglish
Published International Institute for the Science of Sintering, Beograd 2019
Subjects
mechanical activation
sem
sintering
spinel
xrd
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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 ?ll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
AbstractList 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 аll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. OI 172057, and Grant no. III 45007]
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 ?ll specimens exhibited full density, while sample activated for 30 minutes showed the fastest densification rate.
Author Corlett, Cole
Filipovic, Suzana
Fahrenholtz, William
Rogan, Jelena
Buljak, Vladimir
Obradovic, Nina
Djordjevic, Pavle
Vulic, Predrag
Pavlovic, Vladimir
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Snippet 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...
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SubjectTerms mechanical activation
sem
sintering
spinel
xrd
Title Characterization of MgAl2O4 sintered ceramics
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