Showing papers by "Stanislav V. Vassilev published in 2018"
TL;DR: In this article, the ash fusion process of coal-biomass ashes, rice straw ash, coal-anthracite ash and coal biomass ash with different rice straw addition ratios during co-gasification under CO2 atmosphere was elucidated.
26 citations
TL;DR: In this paper, the photocatalytic activity of thin SnO2/TiO2 bicomponent coatings with underlayer, were deposited by spray pyrolysis.
9 citations
01 Jan 2018
TL;DR: In this paper, the corrosion resistance of the coatings were examined by evaluation of the weight loss in NaCl medium, and it was proved that the TiO2/SiO2 coatings exhibit higher corrosion resistance in comparison to ZrO2 and SiO2 underlayers.
Abstract: Titanium dioxide coatings and zirconium dioxide were deposited on SiO2 underlayers by sol-gel method on stainless steel plates. The samples were treated at two different temperatures (500 and 700oC) in air. The morphology was examined by means of Scanning electron microscopy (SEM) and the phase composition by X-ray diffraction analyses. The corrosion resistance of the coatings were examined by evaluation of the weight loss in NaCl medium. The TiO2/SiO2 coatings possess relatively smooth surface with some crystallites on the surface, while ZrO2/SiO2 coatings are not so smooth. After treatment at higher temperature the ZrO2/SiO2 coatings become rougher. The weight loss measurement have proved that the TiO2/SiO2 coatings exhibit higher corrosion resistance in comparison to ZrO2/SiO2 coatings. The TiO2/SiO2 coatings, treated at 500oC after the corrosion test retain their characteristic grain structure without any cracks and other defects. Similar is the structure of these coatings, treated at 700oC. The better protective properties of TiO2/SiO2 could be attributed to their amorphous dense structure.