期刊
RESULTS IN PHYSICS
卷 7, 期 -, 页码 955-961出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.rinp.2017.02.020
关键词
Rice husk; Manganese dioxide; Glass; Zinc silicate; Sintering; Optical properties
资金
- Malaysian Ministry of Higher Education (MOHE) through the Fundamental Research Grant Scheme
In this study, an investigation was conducted to explore and synthesize silicate (SiO2) glass from waste rice husk ash (RHA). MnO2 doped zinc silicate glasses with chemical formula [(ZnO)(55) + (WRHA)(45)](100-X)[MnO2](X), (where X = 0, 1, 3 and 5 wt%) was prepared by conventional melt quenching technique. The glass samples were characterized using energy dispersive X-ray fluorescence (EDXRF), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and ultraviolet-visible (UV-Vis) spectroscopy. The results revealed that by increasing the concentration of MnO2, the color of glass samples changed from colorless to brown and the density of glass increased. XRD results showed that a broad halo peak which centered on the low angle (2 theta = 30 degrees) indicated the amorphous nature of the glass. FTIR results showed basic structural units of Si-O-Si in non-bridging oxygen, Si-O and Mn-O in the glass network. FESEM result showed a decreasing porosity with an increasing MnO2 content, which was attributed to the Mn ions resort to occupy interstitial sites inside the pores of glass. Besides, the absorption intensity of glass increased and the band gap value decreased with increasing the MnO2 percentage. In this synthesized glass system of MnO2 doped zinc silicate glasses using RHA as a source of silica, the MnO2 affect most of the properties of the glass system under investigation. (C) 2017 The Authors. Published by Elsevier B. V. This is an open access article under the CC BY-NC-ND license.
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