Abstract
Abstract The lead zirconotitanate Pb(Zr1−xTix)O3 compositions (PZT) are one of the most important families of materials used for the manufacture of piezoelectric ceramics. They crystallize with a A2+B4+O3 perovskite structure. It is known for a long time that the dielectric and mecanoelectric properties of PZT may be changed with suitable isovalent or heterovalent substitutions in the A or B site. The purpose of this paper is to define an elementary principle of multiple substitutions in the A site: The mean dimension of the substituted ions is maintained in order not to disturb the initial solid solution. So we have studied the simplest example of a double isovalent substitution: Sr2+ and Ba2+. The initial PZT composition contains 12% Sr2+ (RSr2+ RPb...
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