Features of ZnO Nanocrystal Size Distribution in a Polymer Matrix

Physics of the Solid State - X-ray diffraction patterns of a photocurable epoxy acryl-based polymer composite with addition of ZnO nanocrystals are analyzed. We recover the size distribution...     

Dispersion of crystalline powder materials in gaseous media of different chemical compositions

The process of grinding of rutile and barite crystalline powders in a laboratory ball mill in different types of gaseous media (air, nitrogen, helium) has been investigated. Comparative evaluations of the intensity of the dispersion of these minerals have been performed and the particle sizes of powders obtained in different modes of their dispersion have been measured. A sharp increase in the intensity of this process in the helium medium as compared to the air and nitrogen media has been revealed and ultrafine-grained particles of barite powders have been obtained. The results of the performed investigations have demonstrated that the helium medium can be recommended for producing nanoparticles of powder materials in modern types of ball and bead mills with a drastic decrease in the time and energy consumptions required for their preparation.     

Silicon-Containing Epoxy Composites and Their Use in Marine Coatings Technology

Russian Journal of Applied Chemistry - Preparation of silicon-containing epoxy composites with unique properties using silanes, siloxanes, silica, and polyhedral oligomeric silsesquioxanes (POSSs)...     

Investigation of the energy-saving process of cement dispersion in a helium atmosphere

The process of commercial cement grinding in a helium atmosphere has been investigated in comparison with the process in an air atmosphere. Raw material particles have been sorted by sizes. Curves of helium release from the raw material after its grinding in air and in helium in the temperature range T = 20–1200°C have been constructed and analyzed. The influence of the character of water molecule adsorption on raw material cement particles before and after grinding in air and in helium and on the shape of helium release curves has been revealed.