  We have carried out powder x-ray diffraction and dielectric studies on the
lead free solid solution (1-x)SrTiO3-xBi(Zn1/2Ti1/2)O3 ((1-x)ST-xBZT) with
x=0.05, 0.10, 0.15, 0.20, 0.30 and 0.50 to explore the ferroelectric and
piezoelectric properties. Analysis of the powder x-ray diffraction data reveals
the cubic structure (space group Pm3m) of (1-x)ST-xBZT for the composition with
x < 0.20, at room temperature as well as at low temperature. Highly tetragonal
BZT fails to introduce any tetragonality when alloyed with ST. The solid
solubility is limited to x< 0.20 and for higher BZT concentrations impurity
phases start appearing. The ferroelectric and dielectric characterization of
(1- x)ST-xBZT solid solution shows that all the compositions are paraelectric.
The implications of the absence of tetragonal distortion in (1-x)ST-xBZT solid
solution is discussed in connection with recently investigated other solid
solutions based on BZT.
