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Nb-doped lead zirconate titanate (PZT) compositions (2.4 mol%) close to the morphotropic phase boundary (MPB) were investigated systematically as a function of Sr doping as well as Zr:Ti ratio. Sr substitution for Pb in PZT shifted compositions away from the MPB toward the tetragonal phase, greatly reducing the Curie temperature and broadening the dielectric constant maximum, but also decreasing the...
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