First we derive a nonlinear theory of thermoelastic dielectrics with v
oids. The treatment is bared upon the dynamical theory of elastic diel
ectrics developed by Toupin and the theory of elastic materials with v
oids established by Nunziato and Cowin. Then we establish the equation
s of infinitesimal deformations and weak fields superimposed on a fini
te thermoelastic deformation and strong electromagnetic field.