Relationship between Thermal Conductivity and Structure of Molten Borate and Silicate Systems

摘要：

　　The thermal conductivity of molten B2O3,Na2O-B2O3,Na2O-SiO2,and Na2O-B2O3-SiO2 was measured using the transient hot-wire method.Both temperature and composition dependence of thermal conductivity were investigated.While thermal conductivity of other molten oxide systems show negative temperature dependence,positive temperature dependence was observed in pure B2O3 because of its structural change.A positive relationship between the thermal conductivity and the relative fraction of 4-coordinated boron(or Q4 unit)was observed in the Na2O-B2O3(or Na2O-SiO2)system.Finally,a contradictory effect of Na2O concentration on thermal conductivity was observed in the Na2O-B2O3-SiO2 system because of structural changes in both the silicate and borate.

关键词： thermal conductivity hot-wire method molten oxide structure mold flux

作者: Youngjae KIM Kazuki MORITA

作者单位: Dept.of Materials Engineering,Graduate school of Engineering,The University of Tokyo,Tokyo 113-8656,Japan

会议类型: 国际会议

会议名称: the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)

会议地点: 北京

会议语种:英文

页码: 618-621

在线出版日期: 2015-05-12（万方平台首次上网日期，不代表论文的发表时间）