Abstract
Blast furnace slag (BFS), one kind of typical solid waste in the steel industry, was used as structural materials to synthesize NaNO3/BFS composite phase change materials (C-PCMs) by mixing and sintering method. NaNO3 in the composites functioned as phase change materials (PCMs) and BFS as structural skeleton to maintain a stable external form. In this study, the prepared C-PCMs could remain in the solid state without salt leakage even if operating temperature exceeded the melting temperature of NaNO3. The composition and structure of BFS and the prepared composites were characterized by XRD, FTIR, SEM and TG-DSC analyses. The results showed that NaNO3 was well incorporated in the pores of BFS. The melting temperature and latent heat of the final composites were 300.5 °C and 65.53 J/g, respectively. The product also had good thermal storage performance and durability even after 100 thermal cycles. The energy density of the product was calculated as high as 468.03 J/g for an temperature range of 50–400 °C.
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Acknowledgements
The authors would like to express their heartful thanks to National Natural Science Foundation of China (No. 51574283), the Natural Science Foundation of Hunan Province, China (No. 2016 JJ2143) and Fundamental Research Funds for the Central Universities of Central South University (No. 2017zzts578).
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Liu, J. et al. (2018). Preparation and Characterization of NaNO3/BFS Composite Phase Change Materials. In: Li, B., et al. Characterization of Minerals, Metals, and Materials 2018 . TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72484-3_9
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DOI: https://doi.org/10.1007/978-3-319-72484-3_9
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