Influence of CeO2 addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第6期
论文作者：Hong-ling Zhou Ke-qin Feng Chang-hong Chen Zi-di Yan
文章页码：689 - 695
摘 要：Foamed glass-ceramics doped with cerium oxide（CeO2）were successfully prepared from high-titanium blast furnace slag by one-step sintering.The influence of CeO2 addition（1.5wt%–3.5wt%）on the crystalline phases,microstructure,and properties of foamed glass-ceramics was studied.Results show that CeO2 improves the stability of the glass phase and changes the two-dimensional crystallization mechanism into three-dimensional one.XRD analysis indicates the presence of Ca（Mg,Fe）Si2O6 and Ca（Ti,Mg,Al）（Si,Al）2O6 in all sintered samples.Added with CeO2,Ti CeO4 precipitates,and crystallinity increases,leading to increased thickness of pore walls and uniform pores.The comprehensive properties of foamed glass-ceramics are better than that of samples without CeO2.In particular,the sample added with a suitable amount of CeO2（2.5wt%）exhibits bulk density that is similar to and compressive strength（14.9 MPa）that is more than twice of foamed glass-ceramics without CeO2.
Hong-ling Zhou，Ke-qin Feng，Chang-hong Chen，Zi-di Yan
School of Manufacturing Science and Engineering, Sichuan University
摘 要：Foamed glass-ceramics doped with cerium oxide（CeO2）were successfully prepared from high-titanium blast furnace slag by one-step sintering.The influence of CeO2 addition（1.5wt%–3.5wt%）on the crystalline phases,microstructure,and properties of foamed glass-ceramics was studied.Results show that CeO2 improves the stability of the glass phase and changes the two-dimensional crystallization mechanism into three-dimensional one.XRD analysis indicates the presence of Ca（Mg,Fe）Si2O6 and Ca（Ti,Mg,Al）（Si,Al）2O6 in all sintered samples.Added with CeO2,Ti CeO4 precipitates,and crystallinity increases,leading to increased thickness of pore walls and uniform pores.The comprehensive properties of foamed glass-ceramics are better than that of samples without CeO2.In particular,the sample added with a suitable amount of CeO2（2.5wt%）exhibits bulk density that is similar to and compressive strength（14.9 MPa）that is more than twice of foamed glass-ceramics without CeO2.
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