Mastelaro, Valmor RobertoFavarim, Higor RogerioMesquita, AlexandreMichalowicz, AlainMoscovici, JacquesEiras, José Antonio2015-02-232015-02-232015MASTELARO, V. R. et al. Local structure and hybridization states in Ba0.9Ca0.1Ti1 xZrxO3 ceramic compounds: Correlation with a normal or relaxor ferroelectric character. Acta Materialia, Oxford, v. 84, p. 164-171, 2015. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1359645414008234>. Acesso em: 20 fev. 2015.1359-6454http://www.repositorio.ufop.br/handle/123456789/4466This paper reports on a multi-edge X-ray absorption analysis to elucidate how the substitution of Ti4+ by Zr4+ ions acts on the local order structure and on the O 2p hybridization states of Ba0.9Ca0.1Ti1_xZrxO3 (BCZT) lead-free ceramic compounds, inducing a ferroelectric evolution from a normal to a relaxor character. Ti, Ba, Zr and O X-ray absorption spectra were measured to probe the local and electronic structure of BCZT samples that exhibit a normal (x < 0.18) or relaxor (xP 0.18) ferroelectric character. X-ray absorption near edge structure results show that the local symmetry and distortion of TiO6, ZrO6 and BaO12 units are not significantly affected by the Ti/Zr ratio, the ferroelectric character or the long-range order symmetry. The assignment of the ab initio density of states associated with the O K-edge enabled a correlation between the decrease in the hybridization between O 2p and Ti 3d states and the ferroelectric character evolution of the BCZT samples. The hybridization states in the ferroelectric relaxor samples exhibit a more symmetric spatial configuration, as occurs with long-range symmetry.en-USFerroeletricsRelaxorsLead freeHybridizationArtigo publicado em periodicoO periódico Acta Materialia concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3565400526993.https://doi.org/10.1016/j.actamat.2014.10.059