Phase Equilibrium in Solid Solutions of BaTiO3 Doped with Eu3+ and Gd3+
摘要
Barium titanate is an ABO3 type perovskitePerovskite of great interest due to its magnetic, dielectric, piezoelectric, and thermal properties, among others. At room temperature BaTiO3BaTiO3 presents a stable tetragonal crystalline structureStructure. In this work, solid solutionsSolid solutions of the Ba1−3xGd2xTi1−3xEu4xO3 type were sintered by the solid state reactionSolid state reaction method in air at 1300 °C for 6 h with steps of 4 °C per minute with x = 0, 0.001, 0.002 and 0.003. The tetragonal (JCPDS 96-150-7757) and cubic (JCPDS 96-155-9964) phase of BaTiO3BaTiO3 was determined by X-ray diffraction and Rietveld refinement when BaTiO3BaTiO3 was doped. The evolution of the equilibrium of the phases was analyzed according to the increase of the dopantsDopants Eu3+ and Gd3+ and the increase in the stability of the cubic phase of BaTiO3BaTiO3 was determined.