Study on structure characteristics of B2O3 and TiO2-bearing F-free mold flux by Raman spectroscopy
Structure characteristics of fluoride-Free mold flux containing simultaneously B2O3 and TiO2 have been investigated by Raman spectroscopy in this work. Raman spectra for glass samples with different basicities, different contents of TiO2 and B2O3 were recorded during the experiments. According to the experiments results, increase of TiO2 content leads to the appearance of TiO4 and TiO6 structure groups, and TiO4 becomes the main structure unit in the system. TiO2 produces a certain destructive effect on Si-O-Si network structure as well as large borate group and conducive to the formation of some other complex structure groups, such as (Si,Ti) coupling in sheet unit. It can be concluded that, with the increase of B2O3, the ratio of mixing of the Q0 structure unit and TiO4 structural group decrease and the ratio of sheet structure unit increase, and there forms large borate group. Existence of B2O3 increases polymerization degree of the slag system. In addition, increasing basicity causes to the decrease of Q2 and sheet structure unit and increase of mixing of the Q0 structure unit and TiO4 structural group, and weakening the large borate group. It could be concluded that the increase of basicity reduces the degree of polymerization of the system.
Fluoride-Free mold flux B2O3 and TiO2 structure Raman spectroscopy
Zhen WANG Qifeng SHU Kuochih CHOU
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing，Beijing 100083,China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijng 100083, China
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-13
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）