Resumo

RINCON JOYA, MIRYAM  e  BARBA ORTEGA, JOSÉ JOSÉ. STUDY OF THE STRUCTURAL PHASE TRANSITION IN PB_1−XLA_XTIO₃ SYSTEMS. Dyna rev.fac.nac.minas [online]. 2011, vol.78, n.169, pp.216-220. ISSN 0012-7353.

The samples of PB_1−XLA_XTIO₃ (PLT) were prepared using the conventional mixed oxide of high purity sintered at a temperature of 1200°C, with compositions x = 0.0, 2.5, 5, 10.15 and 20%. The samples were analyzed using micro Raman spectroscopy to observe the structural phase transition from tetragonal to cubic, by applying high temperature and hydrostatic pressure. We used the molecular dynamics simulation to describe the structural phase transition of the PLT-induced temperature variation. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to study the synthesis of the samples obtained.

Palavras-chave : Raman; temperature; high hydrostatic pressure; structural phase transition.

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