Transactions of the INDIAN CERAMIC SOCIETY Vol. 58 1999
Densification Study of Attritor Milled
Magnesium Aluminate Spinel
RriWIK SARKAR AND GouT AM BANERJEE Pages : 92-103
DOI:10.1080/0371750X.1999.10799873
Abstract
Pre-synthesization of magnesium aluminate spinel was done by
mixing magnesium hydroxide and aluminium hydroxide in a
molar ratio ofMgO: Al20 3 = 1:1 and then calcining the mixture
at temperatures between 900° and 1600°C. X-ray diffraction
patterns confirmed that only spinel phase was present above
1400°C. Pre-synthesized spinels were then attritor milled up to
6 h and the extent of milling was characterized by surface area
measurement. Milled and unmilled materials were isostatically
pressed at 175 MPa and sintered between 1550° and 1650°C
for 2 h and studied for densification. A maximum of 99%
densification was achieved at a sintering temperature of 1650°C.
