Ryu G U, Kim G M, Khalid Hammad R, Lee H K
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea.
Center for Carbon Mineralization, Climate Change Mitigation and Sustainability Division, Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Korea.
Materials (Basel). 2019 Jul 2;12(13):2131. doi: 10.3390/ma12132131.
Blast furnace slag, an industrial by-product, is emerging as a potential raw material to synthesize hydroxyapatite and zeolite. In this study, the effects of temperature on the hydrothermal synthesis of hydroxyapatite-zeolite from blast furnace slag were investigated. Specimens were synthesized at different temperatures (room temperature, 50, 90, 120, or 150 °C). The synthesized specimens were analyzed qualitatively and quantitatively via X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), BET/BJH, and scanning electron microscopy/energy dispersive using X-ray analysis (SEM/EDX). It was found that the hydroxyapatite phase was synthesized at all the reaction temperatures, while faujasite type zeolite appeared in the specimens synthesized at 90 and 120 °C. Moreover, faujasite was replaced by hydroxysodalite in the specimens synthesized at 150 °C. Additionally, the crystals of the hydroxyapatite tended to become larger and total crystallinity increased as the reaction temperature increased.
高炉矿渣作为一种工业副产品，正逐渐成为合成羟基磷灰石和沸石的潜在原材料。在本研究中，研究了温度对由高炉矿渣水热合成羟基磷灰石-沸石的影响。在不同温度（室温、50、90、120或150°C）下合成试样。通过X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、BET/BJH以及使用X射线分析的扫描电子显微镜/能谱分析（SEM/EDX）对合成的试样进行定性和定量分析。结果发现，在所有反应温度下均合成了羟基磷灰石相，而在90和120°C合成的试样中出现了八面沸石型沸石。此外，在150°C合成的试样中，八面沸石被羟基方钠石取代。另外，随着反应温度的升高，羟基磷灰石的晶体趋于变大且总结晶度增加。
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