| Influence of 1% addition of minor constituents such as MgO, Ti02, Fe20 3 on the
sintering behaviour of beryllium oxide, both in air and in vacuum, has been studied
at different sintering temperatures from 1100°-1500°C and for soaking periods
of 2, 4, and 16 hrs. It was noticed that additions promote densification, more so,
in air sintering and at lower temperatures (1 l00°-1300°C). At higher temperatures (over
1300°C} the influence was not significantly noticeable as the density of the pellets of pure
BeO was fairly high-especially so in vacuum sintering. A typical value of the density
attained by BeO with iron oxide addition is 2.84 gmfcc at temperatures above 1200°C
in air or in vacuum. The samples with magnesia additions tend to be translucent
and those with titania and iron oxide additions coloured, the colour depending on
the atmosphere. An attempt has been made to explain the role of the additions
in promoting the sinterability. |
