Effect of calcium fluoride additions on the sintering of magnesium oxide
The effect of additions of calcium fluoride on the sintering of a refractory grade magnesium oxide fired under reducing conditions was studied. Specimens were formed at very low pressures to simulate compaction achieved in the jolt-pack technique, and at higher pressures commonly encountered in · powder-pressing of ware. Specimens were fired in an induction furnace and held for pre-determined periods at temperatures ranging from 1300°C. to 1900°C. Shrinkage, bulk density, and grain growth factor were determined and presented as a function of composition and temperature.