Atomic substitution effects in binary solid solution systems based upon NaNbO3

Several regular variations of electrophysical properties, which depend on substituting atom's characteristics, have been found by the use of computed and experimental characteristics of interatomic A-O and B-O bonds of solid solutions in binary systems of two types: NaNbO3-A(0.5)(II)NbO(3)(ANb(2)O(6)) and NaNbO3-A(II)TiO(3), where A(II)=Ni,Cu,Mg,Co,Zn,Mn,Cd,Ca, (NaBi)(0.5), (AgBi)(0.5), Sr, (KBi)(0.5), Pb or Ba. The correlations between Curie temperature, T-c, dielectric permittivity, epsilon(33)(T)/epsilon(0), piezocoefficient, d(31), electromechanical coupling factor, K-p, on one hand and interatomic bond lengths A-O and B-O on the other hand have been determined.