Ndung'u, S. N., Nthiga, E. W., & Wanjau, R. N. (2023). Characterization of amorphous silicon nitride prepared from sand and coffee husk wastes by carbothermal reduction-nitridation. African Journal of Pure and Applied Sciences, 4(3), 24–34. https://doi.org/10.33886/ajpas.v4i3.426