Details

Autor(en) / Beteiligte

• Zhou, Lejun
• Li, Huan
• Wang, Wanlin
• Xiao, Dan
• Zhang, Lei
• Yu, Jie

Titel

Effect of Li2O on the Behavior of Melting, Crystallization, and Structure for CaO-Al2O3-Based Mold Fluxes

Ist Teil von

• Metallurgical and materials transactions. B, Process metallurgy and materials processing science, 2018-10, Vol.49 (5), p.2232-2240

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The effect of Li 2 O content on the behavior of melting, crystallization, and molten structure for CaO-Al 2 O 3 -based mold fluxes was investigated in this article, through use of single hot thermocouple technology (SHTT), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray diffraction (XRD). The SHTT results showed that the melting temperature range of the designed mold fluxes decreases and the crystallization of mold fluxes is inhibited first and then becomes enhanced when the Li 2 O content increases from 1 to 6 mass pct. The FTIR and Raman spectroscopy results suggested that Li 2 O could release O 2− ions to break the complex Al-O-Al structural unit into Al-O − structure. Meanwhile, Li 2 O could also stabilize the structural unit of Si-O-Al by link aluminate and Q 0 Si structure through providing Li + ions to merge into the network and compensate for the charges between Al 3+ and Si 4+ . Besides, the XRD results indicated that the precipitation of LiAlO 2 in molten slag would enhance the crystallization behavior of mold flux when Li 2 O content is over 4.5 mass pct.