Effects of Fe2O3 on the properties of ceramics from steel slag

作     者：Yu Li Li-hua Zhao Ya-kun Wang Da-qiang Cang 

作者机构：State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China China Electronics Standardization Institute Number 1 An-Dingmeng East Road Beijing 100007 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2018年第25卷第4期

页      面：413-419页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0806[工学-冶金工程] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 51474027) 

主　　题：solid wastes ceramics ferric oxide fluxing role augite phase transformation 

摘      要：Ferric oxide is one of the key factors affecting both the microstructure and the properties of CaO-MgO-SiO2-based ceramics. Research on this effect is significant in the utilization of iron-rich solid wastes in ceramics. Ceramic samples with various Fe2O3 contents（0 wt%, 5 wt%, and 10 wt%） were prepared and the corresponding physical properties and microstructure were studied. The results indicated that Fe2O3 not only played a fluxing role, but also promoted the formation of crystals. Ceramics with 5 wt% of Fe2O3 addition attained the best mechanical properties with a flexural strength of 132.9 MPa. Iron ions were dissolved into diopside, consequently causing phase transformation from diopside and protoenstatite to augite, thereby contributing to the enhancement of its properties. An excess amount of Fe2O3 addition（10 wt% or more） resulted in deteriorated properties due to the generation of an excess volume of liquid and the formation of high-porosity structures within ceramics.