Abstract

Abdelhalim Elbasset^1,2, Lamiae Mrharrab², and Salahedine Sayouri²

DOI : http://dx.doi.org/10.13005/ojc/330143

Lead titanate PbTiO₃ was successfully doped by yttrium (Y), is prepared by the sol-gel method and characterized by X-Ray diffraction (XRD) and Raman spectroscopy. The results obtained showed that Yttrium lead to a sharp decrease in the lattice parameter c accompanied by a small increase in a parameter up to 10% yttrium. By cons beyond 10 mol%, these parameters a and c are evolving slightly to converge towards the same value (a ≈ c). The investigations done by Raman spectroscopy showed the there is a concentration threshold appears around 10% of Y my corresponding in a change in the substitution process in PT sites. it was revealed that substitution Y²⁺ by a bivalent lead ion Pb²⁺ in PbTiO₃, not require the load compensating, by cons when the rate Y is greater than 10%, the substituted yttrium has both Pb²⁺ and Ti⁴⁺ in the structure PbTiO₃ which requires cost compensation.

Load compensating; Yttrium (Y); Lead titanate PbTiO3

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