Transactions of the INDIAN CERAMIC SOCIETY Vol. 38 1979
Influence of Additions on the Fusion of
Magnesia and Sintering Behaviour
B. D. ZOPE AND S. V. K. RAO
Pages : 161-165
DOI : 10.1080/0371750X.1979.10840910
Abstract
Magnesia is a highly refractory oxide and finds use in
many applications above 1800°C. Sinterable magnesia
powders can be made by calcination of parent compounds
but due to hydration, these are not amenable for aqueous
medium slip casting or tamping, for which fused magnesia
powders are more suitable. However, arc-fusion of
magnesia is difficult and costly. Therefore, the addition
of Al20., Zr02 and Ti02 to magnesia was investigated
for fusion and the sintering behaviour of the fused material
was studied. The addition of the oxides facilitated the
fusion of magnesia at moderate powder inputs. The material
thus obtained could be slip cast and sintered to 85 - 96%
theoretical density at sintering temperatures between
1400° and tsoo·c.
