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

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

Ali Talimian, Vaclav Pouchly, Karel Maca, Dusan Galusek

Materials (Basel). 2019 Dec 24;13(1):102.

PMID: 31878247

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 °C. Although MnF2 and CoF2 promote the densification as effectively as LiF, they cause significant grain growth.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP12068518	Magnesium aluminate, spinel		12068-51-8	Price

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