Sintering Kinetics of a MgAl^sub 2^O^sub 4^ Spinel Doped with LiF

The sintering kinetics of a pure magnesium aluminate spinel, ..., and that doped with LiF were determined through the use of the master sintering curve technique developed by Su and Johnson... Powders with 0%, 0.5%, and 1.0% by mass LiF were densified in a vacuum hot press under a range of unaxial pressures. After the sintering mechanisms in each temperature and pressure regime were determined, an optimized vacuum hot-pressing schedule was formulated for spinel powders doped with 1.0% by mass of LiF. In addition to forming a transient liquid phase, the presence of LiF leads to the formation of oxygen vacancies that promote late-stage sintering in ... (ProQuest: ... denotes formulae/symbols omitted.)