[g/cm³] of technical ceramics lies between 20 and 70%
of the density of steel. This presents the possibility of
weight reductions, which is an advantage for moving parts
in machine construction.
The relative density, d [%], has a significant effect on the
properties of the ceramic. For this reason it can be important,
for instance, for mechanical applications to achieve a density
close to the theoretical figure without generating density
gradients, in order to obtain the best possible mechanical
On the other hand, relatively low densities resulting from
uniform porosity can, for instance, have a positive effect
on the ability to withstand thermal shock.
Figure 81: A guide to the bending strength
and density of selected materials