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Information × Registration Number 0224U033366, (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 Випробування матеріалів, розроблених на основі систем оксид Бору – фторид металу, методом термічного випаровування у вакуумі. Head Zinchenko Viktor F., Доктор хімічних наук Registration Date 25-12-2024 Organization Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine popup.description1 Establishment of the mechanism of acid-base interaction between Boron (III) oxide and fluoride of metal of II-IV groups of the Periodic Table of the Elements, which occurs at high temperatures in an inert medium and deep vacuum, followed by the formation of thin-film coatings transparent in ultraviolet, visible and infrared ranges of a spectrum for interference optics. popup.description2  The object of the study is the acid-base interaction in the systems Boron oxide–metal fluoride of groups II-IV (MgF2, ScF3, (Zr,Hf)F4). The aim of the work is to establish the influence of the addition of Boron oxide on the structure and optical properties of fluorides for their possible use as materials of interference optics. Using the methods of high-temperature synthesis in an inert environment, X-ray phase analysis and IR transmission spectroscopy, differences in the nature of the specified interaction were established. Metal fluorides were tested by the method of thermal evaporation in vacuum and the effect of thermal treatment on their structural and optical properties in the initial and thin-film states was established. In the B2O3–MgF2 system, a newly formed phase was discovered – Magnesium fluoroborate of the composition Mg3(BO3)F3, and in the case of the B2O3–(Zr,Hf)F4 systems, the main result of the interaction is α→β phase transitions occurring in the corresponding metal tetrafluorides. At the same time, the interaction of B2O3 with ScF3 leads to the formation of a volatile product BOF. It was found that the refractive index decreased slightly (from 1.42 to 1.41) after the addition of the additive, while the mechanical strength showed a certain increase. The refractive index of the coatings obtained from ZrF4 and HfF4 after heat treatment with B2O3 remained almost constant and was 1.53 for most samples. The coating with B2O3–ScF3 has a very low refractive index (1.39), while the mechanical strength decreased slightly compared to the original metal fluoride. A probable mechanism is proposed that explains the influence of B2O3 on oxygen-containing impurities present in metal fluorides. The prospects for the application of Boron oxide–metal fluoride systems as film-forming materials in optics in the ultraviolet and infrared spectral ranges are shown. Practical results–optimization of optical and operational properties of coatings for optical instrumentati Product Description popup.authors Yeromin Oleh H. Babenko Anton V. Volchak Hanna V. Doha Pavlo H. Zseltvai Ivan І. Zinchenko Viktor F. Kucher Albert O. Mahunov Ihor R. Stamikosto Olena V. Tesliuk Olha I. Chivireva Nataliia О. popup.nrat_date 2024-12-25 Close