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Chemical Interaction Between LiF and MgAl 2 O 4 Spinel During Sintering
Author(s) -
Rozenburg K.,
Reimanis I. E.,
Kleebe H.J.,
Cook Ron L.
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01723.x
Subject(s) - spinel , differential scanning calorimetry , sintering , scanning electron microscope , materials science , gravimetric analysis , analytical chemistry (journal) , diffraction , mineralogy , phase (matter) , thermogravimetric analysis , chemical engineering , chemistry , metallurgy , composite material , thermodynamics , optics , physics , organic chemistry , chromatography , engineering
Reactions between LiF and MgAl 2 O 4 at temperatures up to 1500°C are examined with a variety of tools, including differential scanning calorimetry, thermo‐gravimetric analysis, X‐ray diffraction, and scanning electron microscopy. LiAlO 2 and MgF 2 are found to be the active reaction products at these temperatures. A transient liquid phase comprising MgF 2 and LiF forms at intermediate temperatures, but then is consumed at higher temperatures during the reformation of MgAl 2 O 4 . If processed as an uncompacted powder mixture, all of the initial LiF in the system eventually vaporizes at temperatures exceeding 1300°C. A new reaction sequence relevant to the densification of LiF‐doped MgAl 2 O 4 spinel is proposed.