Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids

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Date
2020-01-01
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Mark
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MDPI
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Abstract
Highly dense magnesium aluminate spinel bodies are usually fabricated using pressure-assisted methods, such as spark plasma sintering (SPS), in the presence of lithium fluoride as a sintering aid. The present work investigates whether the addition of transition metal fluorides promotes the sintering of MgAl2O4 bodies during SPS. At the same time, such fluorides can act as a source of optically active dopants. A commercial MgAl2O4 was mixed with 0.5 wt% of LiF, MnF2, and CoF2 and, afterwards, consolidated using SPS at 1400 degrees C. Although MnF2 and CoF2 promote the densification as effectively as LiF, they cause significant grain growth.
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Materials . 2020, vol. 13, issue 1, p. 102-1-102-10.
https://www.mdpi.com/1996-1944/13/1/102
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Peer-reviewed
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en
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Creative Commons Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
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