Authors:
Uilame Umbelino Gomes (1), Kívia Fabiana Galvão de Araújo (1), Maria José Santos Lima (1), Vitor Manoel Silva Fernandes De Souza (1), Cléber da Silva Lourenço (1), Rafael Alexandre Raimundo (2)
1- Materials Science and Engineering Postgraduate Program, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil
2- Department of Physics, Federal University of Paraíba, 58051-900, João Pessoa, Brazil
Abstract:
Copper niobate (CuNb2O6) has been studied for technological and environmental applications, such as in solar cells and photocatalysts, for example. And to make the application of CuNb2O6 even more feasible, in this study, therefore, high-energy milling was applied in its synthesis process with variation in the milling time, from the precursor powders Nb2O5 and CuO. The calcination occurred in a muffle with temperatures in the range of 500 °C to 1000 °C, for 3 h and heating rate of 5 °/min. Then, the powders were characterized by XRD, SEM, EDS and Raman. The powders showed crystallite sizes smaller than 80 nm, good homogeneity and high purity. The particle morphologies and the Raman spectrum are coherent with the literature. It was also verified that the increase in milling time reduced the initial formation temperature of the monoclinic phase and the calcination time for the complete formation of the orthorhombic phase.
DOI:
https://doi.org/10.59499/EP235765398