@ARTICLE{Wu_Ting_Effect_2025,
 author={Wu, Ting and Zhuang, Hai-Xiang and Sadaf, Shama and Ji, Yi-Long and Wang, Hai-Chuan},
 volume={vol. 70},
 number={No 1},
 pages={13-20},
 journal={Archives of Metallurgy and Materials},
 howpublished={online},
 year={2025},
 publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences},
 publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences},
 abstract={To confirm the impact of Li2O and Na2O on the structure and property of CaO-SiO2-B2O3 based fluorine-free mold fluxes, devices including rotary viscometer, X-ray diffraction, combined with Fourier transform infrared (FTIR) spectroscopy were applied in the present study. From FTIR results, it was noted that with the addition of Li2O (0-3 wt%) and Na2O (4-12 wt%), there would be simpler Si-O and B-O structural units formed. However, all the structure units were intensified when the content of Li2O (4 wt%) was added in slag. By the accumulation of Li2O and Na2O in mold fluxes with various BaO content, the viscosity at 1300℃ decreased generally, showing that viscosity was influenced by the combination of structure and superheat, and superheat gradually played a dominant role as Li2O reached 4 wt%. Depending on the viscosity-temperature curve, all samples showed acidic slag characteristics and the decrement activation energy of slag came as the increment of Li2O and Na2O at the basicity 1.15 in overall, which were beneficial for the play of slag lubrication function. The effect of Li2O on crystallization of fluorine-free mold fluxes with 5 wt% of BaO were analyzed that all the diffraction peaks displayed in the XRD patterns corresponded to the standard peaks of Ca2SiO4 and Ca11Si4B2O22. Li2O has an imperative role in all samples that enhanced the crystallization performance of the mold fluxes in the low-temperature zone.},
 title={Effect of Alkali Oxides on the Structure and Property of Fluorine-Free Mold Fluxes},
 type={Article},
 URL={http://ochroma.man.poznan.pl/Content/134438/AMM-2025-1-02-Wang.pdf},
 doi={10.24425/amm.2025.152501},
 keywords={mold fluxes, Fluorine-free, Structure, Viscosity, Crystallization},
}