Influence of CeO<sub>2</sub> addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag

Hong-ling Zhou; Ke-qin Feng; Chang-hong Chen; Zi-di Yan

doi:10.1007/s12613-018-1616-5

Volume 25 Issue 6

Jun. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(6): 689-695

Hong-ling Zhou, Ke-qin Feng, Chang-hong Chen, and Zi-di Yan, Influence of CeO₂ addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 689-695. https://doi.org/10.1007/s12613-018-1616-5

Cite this article as:

Hong-ling Zhou, Ke-qin Feng, Chang-hong Chen, and Zi-di Yan, Influence of CeO2 addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 689-695. https://doi.org/10.1007/s12613-018-1616-5

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Research Article

Influence of CeO₂ addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag

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Corresponding author:
Ke-qin Feng E-mail: kqfeng@scu.edu.cn
Received: 21 October 2017; Revised: 21 February 2018; Accepted: 2 March 2018

Abstract

Abstract

Foamed glass-ceramics doped with cerium oxide (CeO₂) were successfully prepared from high-titanium blast furnace slag by one-step sintering. The influence of CeO₂ addition (1.5wt%–3.5wt%) on the crystalline phases, microstructure, and properties of foamed glass-ceramics was studied. Results show that CeO₂ improves the stability of the glass phase and changes the two-dimensional crystallization mechanism into three-dimensional one. XRD analysis indicates the presence of Ca(Mg, Fe)Si₂O₆ and Ca(Ti, Mg, Al)(Si, Al)₂O₆ in all sintered samples. Added with CeO₂, TiCeO₄ precipitates, and crystallinity increases, leading to increased thickness of pore walls and uniform pores. The comprehensive properties of foamed glass-ceramics are better than that of samples without CeO₂. In particular, the sample added with a suitable amount of CeO₂ (2.5wt%) exhibits bulk density that is similar to and compressive strength (14.9 MPa) that is more than twice of foamed glass-ceramics without CeO₂.
- foamed glass-ceramics;
- cerium oxide;
- blast furnace slag;
- sintering;
- crystallization

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