Effect of La2O3 and FexO on the viscosity and structure of CaO–MgO–Al2O3–SiO2 melts Zhuoqing An, Jiajing Chen and Fang Yuan Metall. Res. Technol., 121 3 (2024) 314 Published online: 22 May 2024 DOI: 10.1051/metal/2024032