Częstochowa, Poland
Częstochowa, Poland

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Fuchs I.,Bar - Ilan University | Aluma Y.,Tel Aviv University | Ilan M.,Tel Aviv University | Kityk I.,Czestochowa University | Mastai Y.,Bar - Ilan University
Journal of Solid State Chemistry | Year: 2015

In this paper we studied the photoinduced electro optics effects in the thermal transformation process of biosilica to cristobalite, at a relatively low temperature and ambient pressure. This process was characterized by a variety of standards techniques with emphasis on linear electro optic effect measurements. Overall we demonstrated that photoinduced electro optics measurements are very sensitive to the transformation from amorphous structure of silica in the natural sponge samples to laminar string morphology of cristobalite. With this technique we could probe the change in the samples chirality from achiral bio silica to chiral cristobalite structure. Furthermore it is shown that natural biosilica have photoinduced linear electro optics respond indicating the chiral natural of biosilica. © 2015 Elsevier Inc.

Dudek A.,Czestochowa University of Technology | Wlodarczyk R.,Czestochowa University | Nitkiewicz Z.,Czestochowa University of Technology
Materials Science Forum | Year: 2010

Bipolar plates (BPs) are key components of fuel cells. Functions of materials used for fuel cells include equal distribution of gas fuel and air, conduction of electricity between adjacent cells, heat transfer from the cell as well as prevention of gas leakage and cooldown. Moreover, the material must show particular corrosion resistance in cell's working conditions. Meeting particular requirements or prevention of the abovementioned situations will enable efficient operation of cells. Due to multifunctional nature of fuel cell plates, choice of materials used for plates is immensely difficult. This paper presents opportunities of application of a new technology of powder sintering for creation of parts for electricity and heat generators. This work also presents analysis of structural and phase-related properties, porosity and strength tests. © (2010) Trans Tech Publications.

Grabara J.K.,Czestochowa University | Dima I.C.,University Valahia of Targoviste | Kot S.,Czestochowa University | Kwiatkowska J.,Czestochowa University
Research Journal of Applied Sciences | Year: 2011

Modelling and simulation can make time of research and achieving necessary solutions shorter and more effective. In this study, researchers at the beginning present relevant related researches from the fields of logistics systems modelling and some features of advantages and disadvantages of computer simulation. Subsequently, decisive characteristics of simulation tool Dosimis-3 are described. Finally, the study offers a short case on some experiences from using simulation software in order to optimise the production process in real conditions. © Medwell Journals, 2011.

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