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https://open.uns.ac.rs/handle/123456789/1006
Title: | Shungite – a carbon-mineral rock material: Its sinterability and possible applications | Authors: | Obradović, Nina Gigov, Mihajlo Đorđević, Aleksandar Kern F. Dmitrović S. Matović, Branko Đorđević, Antonije Tshantshapanyan A. Vlahović, Branislav Petrović, Predrag Pavlović, Vladimir |
Issue Date: | 1-Jan-2019 | Journal: | Processing and Application of Ceramics | Abstract: | © 2019 University of Novi Sad, Faculty of Technology. All rights reserved. The paper presents results of the influence of mechanical activation of shungite, a carbon-mineral rock material rich in silica and carbon, on its sintering behaviour, and obtaining of pure SiC ceramics. The mechanical activation of the starting powder was performed in a high-energy ball mill in time intervals from 30 to 480 min. The phase composition of the starting powders and sintered samples was analysed by the X-ray diffraction method. The first traces of SiC were detected after sintering at 1350 °C for 2 h in an Ar atmosphere, along with traces of unreacted SiO2. The scanning electron microscopy was performed in order to determine changes in the microstructure. Sintering was performed at various temperatures for 2 h, in an Ar atmosphere and a vacuum. Dielectric properties of the sintered samples were measured in the frequency range from 1 to 500 MHz. The obtained results indicate that the sintered powder is a good candidate for applications as an absorber of electromagnetic waves in microwave engineering. | URI: | https://open.uns.ac.rs/handle/123456789/1006 | ISSN: | 18206131 | DOI: | 10.2298/PAC1901089O |
Appears in Collections: | EF Publikacije/Publications |
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