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Effects of Fe2O3 on the properties of ceramics from steel slag

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Abstract

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 (0wt%, 5wt%, and 10wt%) 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 5wt% 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 (10wt% 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.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51474027).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Yu Li, Li-hua Zhao, Ya-kun Wang & Da-qiang Cang

  2. China Electronics Standardization Institute, Number 1 An-Dingmeng East Road, Beijing, 100007, China

    Li-hua Zhao

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  1. Yu Li
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  2. Li-hua Zhao
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  4. Da-qiang Cang
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Correspondence to Yu Li.

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Li, Y., Zhao, Lh., Wang, Yk. et al. Effects of Fe2O3 on the properties of ceramics from steel slag. Int J Miner Metall Mater 25, 413–419 (2018). https://doi.org/10.1007/s12613-018-1586-7

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  • DOI: https://doi.org/10.1007/s12613-018-1586-7

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