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

článek v časopise ve Web of Science, Jimp

angličtina

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.

MgAl2O4; lithium fluoride; cobalt fluoride; manganese fluoride; spark plasma sintering; grain growth

TALIMIAN, A.; POUCHLÝ, V.; MACA, K.; GALUSEK, D.

1. 1. 2020

MDPI

BASEL

1996-1944

Materials

13

1

Švýcarská konfederace

102-1

102-10

10

https://www.mdpi.com/1996-1944/13/1/102

http://hdl.handle.net/11012/193416