Showing papers by "Peter Baláž published in 2009"
TL;DR: In this paper, a review paper devoted to application of mechanochemistry in extractive metallurgy, crystal engineering, materials engineering, coal industry, building industry, agriculture, pharmacy and waste treatment is presented.
73 citations
TL;DR: In this article, the nanosized realgar As 4 S 4 particles (d ǫ −144nm) have been prepared by a high-energy milling and the solid state properties of the nanoparticles milled under various experimental conditions were characterized by XRD method, by measurement of specific surface area and particle size distribution.
31 citations
TL;DR: In this article, the results illustrate a possibility to manipulate crystal morphology by combining effect of milling and surfactant application, which can be used for nanocrystals characterization, and demonstrate the possibility of manipulating crystal morphology.
Abstract: PbS nanocrystals using surfactant assisted mechanochemical route has been successfully prepared. The methods of XRD, SEM, surface area and particle size measurements were used for nanocrystals characterization. The XRD patterns confirmed the presence of galena PbS (JCPDS 5–592) whatever treatment conditions were applied. The strong observable peaks indicate the highly crystalline nature in formation of PbS nanostructures where preferential crystal growth in the (200) direction after chelating agent (EDTANa2•2H2O) addition has been observed. The mean volume weighted crystallite size 4.9 nm and 35 nm has been calculated from XRD data using Williamson-Hall method for PbS synthesized without and/or with chelating agent, respectively corresponding with surface weighted crystallites sizes of 2.9 and 18.8 nm. The sample prepared without surfactant yields the smaller crystallites and the higher microstrain compared with surfactant assisted synthesis. The obtained results illustrate a possibility to manipulate crystal morphology by combining effect of milling and surfactant application.
16 citations
TL;DR: In this paper, the high energy attrition and planetary ball milling in methanol was applied for the mechanical activation of zinc powder and the changes of the particle size distribution and surface area of cementator, occurring during mechanical treatment have been registered.
15 citations
TL;DR: In this article, the mechanochemical synthesis of Cu, Pb and Sb nanometals was investigated with the regard to solid-state kinetics, and experiments were performed in a planetary mill and in an eccentric vibratory mill by a high-energy milling of Cu 2, PbS, Sb 2 S 3, respectively with elemental iron under a protective atmosphere.
12 citations