Evidence for and calculation of micro-strain in porous synthetic cordierite

Following a preceding work on cordierite thermal expansion, high temperature neutron diffraction has allowed observation of lattice strain with temperature in extruded porous cordierite in the form of a rod. The temperature dependence of the grain microstress in the rod was determined from neutron diffraction data (by comparison with powder data) and from the macroscopic thermal expansion (by the integrity factor model). The two methods are in good agreement.