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0223U005669,
0122U000445
,
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
Zinchenko Viktor F., Доктор хімічних наук
26-12-2023
Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine
The object of research is the acid-base interaction in the boron oxide-fluoride metal systems of groups II-IV. The aim of the work is to establish the effect of acid-base interaction on the structure and optical properties of fluorides for possible use as materials for interference optics of various spectrum ranges. Using methods of high-temperature synthesis in an inert medium, X-ray phase analysis, and IR transmission spectroscopy with Fourier transform, differences in the nature of the specified interaction were established. The effect of adding B2O3 to magnesium, scandium, zirconium, and hafnium fluorides on the binding of oxide impurities present in the matrix of the base materials was investigated. A different nature of the interaction of the additive with fluorides of various metals has been established. The base compound, MgF2, and its interaction products were identified by X-ray phase analysis and IR transmission spectroscopy. The size of MgF2 crystallites, which are on average 18 nm, was calculated from the broadening of the diffraction peaks using the Scherrer equation. After heat treatment with B2O3, the peaks become clearer, which indicates recrystallization. In the IR spectra, in addition to MgF2 absorption bands, inflections corresponding to MgO and a sharp peak possibly belonging to Mg2OCl2 were detected. The B–O absorption peaks after washing with ethanol weaken in intensity. The Rietveld method determined the content of the complex compound Mg3(BO3)F3 at the level of about 9%. In the case of ScF3, ZrF4, and HfF4, the nature of their interaction with the B2O3 additive was monitored by changes in the IR transmission spectra. It was concluded that there are no new complex compounds. Thus, ScOF present in the form of an impurity is transformed into Sc2O3 under the action of B2O3, and in ZrF4 and HfF4, most likely, polymorphic modifications take place. Metal fluorides with the addition of B2O3 are promising materials with a low refractive index.
Ieriomin Oleg G.
Babenko Anton V.
Volchak Ganna V.
Doha Pavlo G.
Zseltvai Ivan І.
Zinchenko Viktor F.
Kucher Albert O.
Magunov Igor R.
Stamikosto Olena V.
Teslyuk Olga I.
Chivireva Natalia О.
2023-12-26
Updated: 2026-01-01
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