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Information × Registration Number 0222U005441, 0122U000445 , R & D reports Title Investigation of the effect of acid-base interaction on the properties of systems Boron oxide– fluoride of metal of groups II-IV of the Periodic Table as the basis of materials for interference optics of UV, visible and IR spectral ranges popup.stage_title Head Zinchenko Viktor F., Доктор хімічних наук Registration Date 30-12-2022 Organization Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine popup.description2 The object of research is the acid-base interaction in Boron oxide-metal fluoride systems, its evaluation according to the concept of electronegativity and thermodynamic calculations, and the prediction of its possible influence on the properties of materials and thin film coatings obtained from them. As a research method, thermodynamic calculations of the reactions that occur between metal fluoride, the oxide impurity present in it, and boron oxide additive are used. The application of the latter is based on ideas about the acid-base interaction between metal oxide as an impurity and Boron oxide, which results in the formation of a complex compound of sufficient strength to prevent side reactions of the oxide impurity, in particular, with the materials of the evaporator in a vacuum. At the same time, the possibility of interaction (unwanted) of Boron oxide with the metal fluoride itself by the exchange reaction mechanism with the formation of volatile compounds of the boron oxofluoride type is taken into account. Thermodynamic calculations of the functions at standard temperature indicate the impossibility of this kind of reaction under standard conditions for all metal fluorides except MgF2. Electronegativity values of reagents were used to determine the degree of interaction between oxide impurities in fluorides and B2O3 additive; a qualitative correlation was established between the difference in electronegativities and the nature of complex oxides. The results of the work will be used to optimize the synthesis conditions and carry out experimental studies of samples of B2O3–MFx systems by the methods of diffuse reflection spectroscopy, IR transmission spectroscopy and further tests by thermal evaporation in a vacuum. The use of the developed materials in optical instrumentation will contribute to increasing the authority of domestic science and technology, as well as strengthening the state's defense capability.  Product Description popup.authors Ieriomin Oleg G. Volchak Ganna V. Doha Pavlo G. Zseltvai Ivan І. Zinchenko Viktor F. Kucher Albert O. Magunov Igor R. Sadkovska Liudmyla V. Stamikosto Olena V. Stoianova Iryna V. Tesluk Olga І. Chivireva Natalia О. popup.nrat_date 2022-12-30 Close