  We describe the static dielectric response of ferroelastic-dielectric
microcomposites. Dependence on temperature, pressure and concentration is
considered for temperatures in the paraelastic transition. In recent years
there has been considerable interest in perovskite oxides for application in
solid oxide fuel cells (SOFC), exhaust gas sensors in automobiles, membranes
for separation processes and as catalysts, which are of the ferroeleastic
nature, f.e. of the ($ LaSrCoO_{3}$) type. Ferroelastic-dielectric
microcomposites and measurement of their properties may improve properties of
perovskite oxides for these applications.
