@article{articleaf959a3d,
title   = {Structural, electrical and optical properties of (K,Ba)(Nb,Ni)O3-δ electroceramics: oxygen vacancy and grain size effects},
author = {Guerra, J. D. S. and Silva, M. C. O. and Silva, A. C. and Oliveira, M. A. and Mendez-González, Y. and Monte, A. F. G. and M'Peko, Jean Claude and Hernandes, Antônio Carlos},
year = {2020},
doi = {10.1016/j.ceramint.2020.05.100},
journal   = {Ceramics International}
}