Electric-Field Effects on Sintering and Reaction to Form Aluminum Titanate from Binary Alumina–Titania Sol–Gel Powders |
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| Authors: | Lia A. Stanciu Joanna R. Groza Vladimir Y. Kodash Maria Crisan Maria Zaharescu |
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| Affiliation: | Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616;Physical Chemistry Institute, Romanian Academy, Bucharest, Romania |
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| Abstract: | The field-activated sintering technique (FAST) was applied to simultaneously sinter and react sol–gel amorphous powders to form Al2TiO5. Densities close to theoretical and conversion to Al2TiO5 (to 92.5%) have been achieved using FAST at 1050°–1200°C for 10 min. Conventional sintering of the same powders at 1300°C for 2 h resulted in 88.9% Al2TiO5 and ∼75% of theoretical density. The enhanced sintering and compound formation using FAST have been explained by the synergistic effects of precursor reactivity, nanosized powders, and electric-field effects. |
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| Keywords: | sinter/sintering sol–gel titanates |
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