Effect of TiO2 on the Thermal Conductivity of Eco-friendly Silica Bricks Fabricated by Yellow River Silt
Silt from the Yellow River was mixed with a certain amount of SiO2 powder to fabricate eco-friendly silica bricks and different amounts of TiO2 were added to ameliorate the thermal conductivity of the bricks. Results showed that the phases of as-fabricated silica bricks are cristobalite and tridymite with cristobalite predominating. With increasing amounts of TiO2, the bulk density and thermal conductivity of the samples increase. Although the bulk density (1.65～1.76 g/cm3 ) than the ideal density 1.85 g/cm3, the thermal conductivity is significantly ameliorated. The thermal conductivity of the sample with 1.5％ TiO2 addition is 2.11 W/m.℃, which is nearly three times higher than that of commercial silica bricks (0.8 W/m.℃).
Silica brick Eco-friendly Silt Thermal conductivity
Jianying YANG Lihua XU Hongshun HAO Shuming YANG
Department of Inorganic Nonmetallic Materials, University of Science and Technology Beijing,Beijing 100083, China
国际会议
重庆
英文
206-210
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）