Structural Evolution and Electrical Properties of BaTiO3 Doped with Gd3+

BaTiO3 doped with Gd3+ (Ba1-xGdxTi1-x/4O3) was synthesized using the solid-state reaction method with x = 0.001, 0.003, 0.005, 0.01, 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, and 0.35 Gd3+ (wt. %). The powders were decarbonated at 900 ºC and sintered at 1400 ºC for 8 hours. The tetragonality of the synthesized Gd3+-doped BaTiO3 particles was analyzed. XRD patterns and Raman spectra revealed that the crystal phase of the obtained particles was predominately tetragonal BaTiO3; the intensity of the Raman bands at 205 cm−1, 265 cm−1, and 304 cm−1 decreased when Gd3+ was increased. A secondary phase (Gd2Ti2O7) was found when the Gd3+ content was higher than 0.15 wt. %. The capacitance of the sintering pellets was measured at 1 kHz; these values were used to calculate the relative permittivity, the maximum permittivity values were recorded for the samples with x = 0.001, 0.005, and 0.1.

Bibliographic Details

Main Authors:	Hernández Lara,Juan Pablo, Pérez Labra,Miguel, Barrientos Hernández,Francisco Raúl, Romero Serrano,Jose Antonio, Ávila Dávila,Erika Osiris, Thangarasu,Pandiyan, Hernández Ramirez,Aurelio
Format:	Digital revista
Language:	English
Published:	ABM, ABC, ABPol 2017
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000200538
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