Co_2O_3-doping Effect on the Formation of 3CaO 3Al_2O_3 CaSO_4  

作　　者：郭惠玲 谢峻林 TAN Chang YU Youjia RAO Chengcheng 

机构地区：[1]Department of Pharmacy, College of Bioengineering, Hubei University of Technology [2]Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第2期347-351,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.50972116)

摘　　要：The Co2O3-doping effect on the formation of 3CaO · 3A12O3· CaSO from CaCO3-A12O3-CaSO4, 2H20 mixtures was investigated by means of SO2 emission behavior, chemical analysis, X-ray diffraction, differential thermal analysis and scanning electron microscopy. The experimental results show that CO2O3 addition increases the reactivity of the CaCO3-A12O3-CaSO4·2H2O system significantly, by reducing SO2 emissions in combustion andf-CaO contents in the clinkers, promoting the nucleation and growth of 3CaO·3A12O3-CaSO4, and intensifying the formation of 3CaO·3A12O3·CaSO4. Moreover, CO2O3 addition lowers the formation temperature of 3CaO·3A12O3·CaSO4 by 18 ℃, and similarly increases the thermal stability of it at a wider temperature range.The Co2O3-doping effect on the formation of 3CaO · 3A12O3· CaSO from CaCO3-A12O3-CaSO4, 2H20 mixtures was investigated by means of SO2 emission behavior, chemical analysis, X-ray diffraction, differential thermal analysis and scanning electron microscopy. The experimental results show that CO2O3 addition increases the reactivity of the CaCO3-A12O3-CaSO4·2H2O system significantly, by reducing SO2 emissions in combustion andf-CaO contents in the clinkers, promoting the nucleation and growth of 3CaO·3A12O3-CaSO4, and intensifying the formation of 3CaO·3A12O3·CaSO4. Moreover, CO2O3 addition lowers the formation temperature of 3CaO·3A12O3·CaSO4 by 18 ℃, and similarly increases the thermal stability of it at a wider temperature range.

关 键 词：3CaO · 3A12O3· CaSO Co2O3 SO2 emission thermal analysis 

分 类 号：O643.36[理学—物理化学]