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- W2116741548 abstract "Abstract The temperature dependence of the crystalline structure and the lattice parameters of Pb1− x La x Zr0.40Ti0.60O3 ferroelectric ceramic system with 0.00 ≤ x ≤ 0.21 was determined. The samples with x ≤ 0.11 show a cubic-to-tetragonal phase transition at the maximum dielectric permittivity, T max. Above this amount and especially for the x = 0.12 sample, a spontaneous phase transition from a relaxor ferroelectric state (cubic phase) to a ferroelectric state (tetragonal phase) is observed upon cooling below the T max. Unlike what has been reported in other studies, the x = 0.13, 0.14, and 0.15 samples, which present a more pronounced relaxor behavior, also presents a spontaneous normal-to-relaxor transition, indicated by a cubic to tetragonal symmetry below the T max. The origin of this anomaly has been associated with an increase in the degree of tetragonality, confirmed by the measurements of the X-ray diffraction patterns. The differential thermal analysis (DSC) measurements also confirm the existence of these phase transitions. Keywords: ferroelectric ceramicsspontaneous phase transitionrelaxor behaviorlong-range order structure Acknowledgements The authors would like to thank Dr R. Muccillo of IPEN, Brazil, for the high temperature XRD data and Prof. C.S. Kiminami and A. Lopes (UFSCar-Brazil) for the thermal analysis and calorimetry measurements. This work was supported by FAPESP (through Projects 2007/00011-1 and 05/53341-9) and Capes Brazilian agencies." @default.
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- W2116741548 title "In situ X-ray diffraction studies of phase transition in Pb<sub>1−</sub><i><sub>x</sub></i>La<i><sub>x</sub></i>Zr<sub>0.40</sub>Ti<sub>0.60</sub>O<sub>3</sub>ferroelectric ceramics" @default.
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- W2116741548 doi "https://doi.org/10.1080/01411591003697090" @default.
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