Análisis estructural de electrocerámicos base BaTiO3 dopados con Y3+

Y. Ramírez-Agis; E. D. German-Magaldi; M. Pérez-Labra; A. Hernández-Ramírez; I. Mendoza-Sánchez; M. Reyes-Pérez

doi:10.29057/aactm.v13i13.18085

Autores/as

Y. Ramírez-Agis Universidad Autónoma del Estado de Hidalgo https://orcid.org/0009-0008-6842-6717
E. D. German-Magaldi Universidad Autónoma del Estado de Hidalgo https://orcid.org/0009-0005-4792-8097
M. Pérez-Labra Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0001-9882-6932
A. Hernández-Ramírez Instituto Politécnico Nacional https://orcid.org/0000-0002-1901-618X
I. Mendoza-Sánchez Universidad Autónoma del Estado de Hidalgo https://orcid.org/0009-0006-3426-9077
M. Reyes-Pérez Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0003-3843-2397

DOI:

https://doi.org/10.29057/aactm.v13i13.18085

Palabras clave:

BaTiO3, Electrocerámicos, Dopaje con Y3+

Resumen

Se sintetizaron soluciones sólidas tipo Ba_1−xY_xTi_1−x/4O₃ (x = 0.0, 0.005 y 0.015) mediante reacción en estado sólido y molienda mecánica para evaluar el efecto de la incorporación de Y³⁺ sobre la estructura cristalina del BaTiO₃. La caracterización estructural mediante difracción de rayos X (DRX) y análisis de Rietveld, confirmó la formación de la fase perovskita con simetría tetragonal, evidenciada por el doblete (002) / (200) cercano a 2θ ≈ 45°. El incremento de Y³⁺ produjo un corrimiento de los picos hacia menores ángulos, indicando una expansión de la red, atribuido a la sustitución parcial del ion Ti⁴⁺ (0.68 Å) por Y³⁺ (0.90 Å) en el sitio B. Se observó una reducción gradual de la tetragonalidad (c/a) de 1.00983 a 1.00801, simultáneo a un incremento en el tamaño de cristalita de 76.28 a 95.35 nm. El dopaje con Y³⁺ disminuye la distorsión tetragonal y favorece el crecimiento de cristalitas, lo que sugiere un impacto directo en las propiedades ferroeléctricas del material.

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