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Optical properties of soda-lime-silica glasses doped with peanut shell powder

Aktas B., Albaskar M., Yalcin S., Dogru K.

Archives of Materials Science and Engineering

2016

Vol. 82, nr 2

57--61

Purpose: Aim of this paper is to investigate the optical properties of soda-lime-silica (SLS) glasses which doped with different quantities of peanut shell (PS) powder. Design/methodology/approach: UV-Vis and Fourier transform infrared (FTIR) spectroscopy techniques are used to determine optical properties of glass. Findings: It was observed that the colorless and transparent pure SLS glass turned dark green in color with the addition of the PS powder. The glasses doped with PS powder contents ≥1 wt.% were translucent. The maximum absorption in the UV spectrum was observed at wavelengths of 306.20, 292.40, 280.20, and 303.20 nm for SLS glasses doped with PS powder contents of 0.5, 1, 3, and 5 wt.%, respectively. The UV-Vis spectroscopy results also indicated that the amount of light transmitted by the SLS glass decreased with increasing PS powder content. The FTIR absorption spectra of the PS powder-doped SLS glasses exhibited various bands corresponding to the symmetric and asymmetric stretching of the bridging oxygen atoms between the tetrahedra. Research limitations/implications: With the addition of the PS to the SLS glass, samples turned to dark green because of Fe2O3. Future researches must focus on this matter. Originality/value: PS powders are doped to investigate optical properties of glass. Thus, glasses, which have good properties such as economically cheap, bio-friendly, are produced from food wastes.

Structural Changes in the Furan Resins by UV Radiation and Atmospheric Air

Bobrowski A.

Archives of Foundry Engineering

2015

Vol. 15, iss. 1 spec.

5--8

In this paper, the results of research of structural changes that occur during in furan resins with different content of furfuryl alcohol by UV radiation and atmospheric air are presented. The research was carried out by transmission method (KBr pellets), using FTIR spectrometer Excalibur 3000 for the three samples of furan resins with different content of furfuryl alcohol. As a result of UV radiation and oxidizing atmosphere only the sample of the resin Kaltharz 8616 remained liquid. Two others (Kaltharz U 404 and Kaltharz 8117) were cured after 1