| Activated Sintering of Natural Magnesites in
Presence of Titanium Dioxide |
M. CHAUDHURI (nee NAm), A. KuMAR and G. BANERJEE
Pages : 130-135
DOI : 10.1080/0371750X.1992.10804560 |
| Abstract |
| The sintering and grain growth of natural Indian magnesite as
a function of added titania have been studied in the range 0.05 to
0.50 wt% Ti01 with respect to the natural magnesite. Grain sizes
in fired compacts have been measured with the aid of an optical
microscope on thin and polished sections. The activation energy
for grain growth In magnesites with and without added titania
has been calculated from the Increase in average grain diameter
as a function of firing temperature and time. A higher activation
energy of 607 k.J/mol has been observed In the case of natural
cryptocrystalline magnesite from Salem with 0.20 to 0.50 wt%
titania addition when compared to the activation energy of 293
k.J/mol in natural coarse crystalline magnesite from Almora with
0.50 wt% added titania in the original magnesite. The higher
activation energy is attributed to change in the mechanism of
sintering due to the addition of titania. |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
