Перегляд за Автор "Savvova, Oksana"
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Документ Antibacterial glass-composite coatings for protection of special purpose steel panels(2011) Savvova, Oksana; Bragina, L. L.; Babich, ElenaIt has been established that the most informative and universal method for determination of biocide properties of vitreous coatings is qualitative method that takes into account the growth level of biotest microorganisms inoculated into liquid nutrient media. It is shown, that biocidity of glass-composite coatings on the basis of glasses of Na₂O–K₂O–CaO–ZrO₂–TiO₂–Al₂O₃–P₂O₅–B₂O₃–SiO₂ system is determined by the presence of calcium phosphates in them and depends on the type of bactericide filler. The most effective ones by the action on Pseudomonas aeruginosa bacterium and Aspergillus niger and Саndida albicans fungiare zinc titanate and Ag⁺, to Escherichia coli- only zinc phosphate.Документ Development of glass-ceramic high-strength material for personal armor protection elements(Національний університет "Львівська політехніка", 2017) Savvova, Oksana; Bragina, L. L.; Voronov, Gennadii; Sobol, Yuliya; Babich, Olena; Shadrina, Galina; Kuriakin, MykolaThe perspective of glass-ceramic high-strength materials used for personal armor elements has been established. The methodological approach has been developed and the choice of initial lithium aluminosilicate system for obtaining high-strength lightweight glassceramic materials has been substantiated. The glass formation area in the chosen system was studied, and model glasses were synthesized. Features of crystal structure formation during heat treatment of the developed model glasses were investigated. As a result, high-strength glass-ceramic materials have been developed. It has been determined that they possess high performance characteristics and can be used in manufacturing of modern composite armor.Документ Investigation of phase separation processes for bioactive glasses in Na₂O–CаO–ZnO–TiO₂–ZrO₂–Al₂O₃–B₂O₃–P₂O₅–SiO₂ system(Lviv Polytechnic National University, 2015) Savvova, Oksana; Babich, ElenaNanostructural changes on initial stages of calcium silicophosphate glasses nucleation in Na₂O–CаO–ZnO–TiO₂–ZrO₂–Al₂O₃–B₂O₃–P₂O₅–SiO₂ system during phase separation have been investigated. It has been established that the presence of drop-shaped nano- and micro-nonuniformities in the structure of calcium silicophosphate glasses substantially affects the glass separation in a precrystallization period, helping intense fine hydroxyapatite crystallization with the crystal size of up to 1 μm after heat treatment.Документ Investigation of surface free energy of the glassceramic coatings on titanium for medical purposes(Lviv Polytechnic National University, 2015) Savvova, Oksana; Shadrina, Galina; Babich, Olena; Fesenko, ОleksiyBiocompatible calcium silicophosphate glassceramic coatings for titanium on the base of glasses in R₂О–RO–RO₂–R₂O₃–P2O₅–SiO₂ system have been obtained. The influence of crystallization ability and roughness of experimental coatings on their surface free energy has been established. The use of titanium implants with applied apatite-containing glass-ceramic coating will significantly increase biocompatibility of the prosthetic implant and will reduce the time of its union with the bone.