Dielectric study of phase transitions in SrTiO3-PbTiO3 ceramic samples
with PbTiO3 content x ranging from 0.002 up to 0.3 is reported. It is
shown that there is a ferroelectric phase transition for x value as l
ow as 0.005. At low x the transition temperature Tc varies as (x-x(c))
(1/2) with x(c)=0.002.