The dielectric and piezoelectric properties of Pb0.96Sr0.04[(Zr1−yTiy)0.74 (Mg1/3Nb2/3)0.20(Zn1/3Nb2/3)0.06]O3 were investigated in the composition range 0.47≤y≤0.57. The piezoelectric ceramic system of PbTiO3–PbZrO3–Pb(Mg1/3Nb2/3)O3–Pb(Zn1/3Nb2/3)O3 with

SrxBa1−xNb2O6 (x=0.4, 0.5, 0.6) ceramic powders have been synthesized by using the aqueous organic gel routes. The desired metal cations are chelated in a solution using citric acid and ethylenediaminetertraacetic acid (EDTA) as the chelating agents. The thermal decompostion of the metal carboxylate precursors gels have been studied by TG/DTA and the products derived from calcinations of the gels at different temperatures have been characterized by XRD and TEM. The results reveal that tetragonal tungsten–bronze-type SBN with fine particle size could be achieved at 800 °C. The pH 8 used during the preparation of Sr–Ba–Nb precursor gels is determined by calculation of the conditional formation constants Kcf of Sr–EDTA and Ba–EDTA complexes. The influences of the pH and the molar ratio of citric acid:Nb cation on the formation of homogeneous Sr–Ba–Nb precursor gels are also studied.