Transactions of the INDIAN CERAMIC SOCIETY Vol. 33 1974
Influence of Calcia Addition on Sintering
Behaviour of Zirconia*
P. Y. DALVI AND v. K. MOORTHY
Pages : 33-38
DOI : 10.1080/0371750X.1974.10840835
Abstract
The influence of the amount of calcia addition on the sintering characteristics of
zirconia and the physical properties of the sintered products has been studied. It was
noticed that the optimum amount of calcia addition was 0.50 to 0.75 wt% to obtain
high density without cracking of the ware. Higher additions of cal cia invariably resulted
in lowered density. The extent of stabilization was studied by x-ray diffraction and
dilatometry.
Though the stabilization (conversion to the cubic structure) was not obtained with
0.50 and 0. 75 wt% addition of calcia, and the presence of hysteresis loops in the dilatometric
curves were noticed in the samples sintered at temperatures up to 1500°, they
were found to have sufficent thermal shock resistance to be used as refractory ware.
