SINTERABILITY OF VARIOUS HIGH-PURITY MAGNESIUM-OXIDE POWDERS

The sinterability of high-purity MgO powders with different production histories was investigated to make clear the relationship between the powder characterization, the densification processes, and the changes in microstructure both with increasing temperature at a rate of 10 degree C min** minus **1 and at a fixed temperature of 1450 degree C for 5 h. The densification behaviour and the changes in microstructure of these compressed bodies were affected chiefly by their original surface activity and degree of agglomeration, depending on the production histories.