Effects of aluminum substitution by potassium in the P2O5-Al2O3-Na2O-K2O phosphate glasses - Filho, José C.; Zílio, Sérgio Carlos; Messias, Djalmir N.; Pilla, Viviane; Silva, Anielle C. Almeida; Dantas, Noelio O.; Andrade, Acácio A. (Journal of Alloys and Compounds, 2020)