Navegando por Autor "Nascimento, Rubens Maribondo Do"

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Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties
(Elsevier, 2020-10) Nascimento, Rubens Maribondo Do; Carregosa, João Domingos Covello; Grilo, João Paulo de Freitas; Godoi, Glauber Silva; Macedo, Daniel Araújo de; Oliveira, Rosane Maria Pessoa Betânio
This work reports the microstructural (XRD/SEM), dilatometric and electrical characterization (impedance spectroscopy) of ceria (CeO2) obtained by microwave-assisted hydrothermal synthesis under mild conditions (T = 120 °C and short reaction times of 10 and 20 min). The as-prepared and calcined powders show characteristic diffraction peaks of the cubic fluorite-type structure of cerium oxide. A remarkable sinterability allows obtaining dense ceramics (relative densities exceeding 95%) with enhanced electrical properties (σt = 2.14 × 10−5 S cm−1 at 500 °C) after sintering at a temperature as low as 1200 °C

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