Obtaining the ferroelectric phase in BaTiO3 base ceramics doubly doped with rare earths
Abstract
Ceramic materials with a perovskite-like structure such as barium titanate either undoped or doping have been of great interest thanks to its various electrical applications, including; dielectric capacitors, resistors termal sensors, multilayer capacitors and others. The characteristics of this type of materials are determined by its microstructure and its chemical composition, these variables are determined by the synthesis process, the quality of the precursor materials and the addition of dopants. The objetive of this work is to sinter solid solutions of the type Ba1-3XGd2XTi1-3XEu4XO3, using high purity precursors at concentrations of x equal to 0.1%, 0.15%, 0.3% and 0.6% in weigh, in order to obtain a ferroelectric phase doped with 〖Gd〗^(3+) and Eu^(3+). Power mixes were sintered at 1300 °C for 6 hours. Microestructural evolution was characterized by x ray diffraction and scanning electron microscopy. The results showed evidence of the structural evolutions, of a ferroelectric phase (tetragonal).
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References
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