Influence of Nb2O5 and basicity on the viscosity and structure of CaO-SiO2-Nb2O5-CeO2-CaF2 slag systemZhuang Ma, Zengwu Zhao, Wentao Guo and Zhi WangMetall. Res. Technol., 117 3 (2020) 307DOI: https://doi.org/10.1051/metal/2020023