Silva, P. F., Oliveira, F. das C., Sousa, R. M. L., Lopes, P. D., Conceição, I. G. C. da, Paz, G. M. da, & Soares, R. A. L. (2021). Availability of raw materials in the state of Piauí for the production of ceramic coating. International Journal for Innovation Education and Research, 9(4), 110-119. https://doi.org/10.31686/ijier.vol9.iss4.3025