http://dspace.nbuv.gov.ua:80/handle/123456789/132701 Mon, 20 Apr 2026 21:55:29 GMT 2026-04-20T21:55:29Z http://dspace.nbuv.gov.ua:80/bitstream/id/394679/ http://dspace.nbuv.gov.ua:80/handle/123456789/132701 http://dspace.nbuv.gov.ua:80/handle/123456789/136998 Multilayer X-ray mirrors Mo-B₄C- new crystals-analyzers for wavelength range of 5 to 12 A Kopylets, I.A.; Baturin, A.A.; Mikhailov, I.F. Structure and X-ray optical properties of Mo—B₄C multilayer mirrors with period from 13.2 to 33.8 A have been studied. The reflectivity values for the Mo—B₄C mirrors and the traditionally applied RbAP crystal (2d = 26.5 A) have been measured in the 4.7 to 11.9 A range. The interlayer boundary roughness attaining 3 A was found to be the main structure cause of the reflectivity drop with decreasing mirror period. The Mo—B₄C multilayer X-ray mirrors have been shown to provide 2 to 5 times intensity gain as compared to RbAP ones and to be the promising broadband diffraction elements. Mon, 01 Jan 2007 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/136998 2007-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/136996 Preparation of tungsten crucibles starting from tungsten fluoride Gorenko, Yu.V.; Korzh, A.F.; Lytvynov, L.A.; Semyonov, N.A.; Hovansky, N.A.; Shirokov, B.M. The study results are presented on technology development for forming of cylindrical tungsten crucibles starting from tungsten fluoride by reduction WF₆ with hydrogen in horizontal flow-type reaction under reduced pressure. It has been shown, that one way to nonporous with smooth outer surface, heigh surface purity and high strength consist in the deposition process realization in diffusion area at 550°C and the partial pressures ratio in the gas mixture PH₂/PWF₆ = 10/1 Mon, 01 Jan 2007 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/136996 2007-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/136995 Structure of near-surface magnetic layer in iron borate Zubov, V.E.; Strugatsky, M.B.; Skibinsky, K.M. Magnetic structure of inhomogeneously magnetized near-surface magnetic layer for non-basal baces of FeBO₃ single crystals has been calculated. That layer has macroscopic thickness and can be observed in easy-plane weak ferromagnets. The calculation in based on our theory of Iron Borate surface magnetism. Mon, 01 Jan 2007 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/136995 2007-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/136993 Electrochemical synthesis of catalytic active alloys Nenastina, T.; Bairachnaya, T.; Ved, M.; Shtefan, V.; Sakhnenko, N. The aspects of man-caused gaseous waste purification from hydrocarbons, nitrogen oxides and carbon using supported catalytic neutralizers are analyzed. The replacement of platinum metals in catalysts by alloys and oxide compounds is discussed to be an actual task. The use of hydrogen release reaction is proposed to estimate the catalytic activity of synthesized materials. Electrochemical methods are shown to be of good prospects in catalytic material design. Current exchange dependence on "metal-hydrogen" and "metal-oxygen" bond energy is used for alloy property prediction. The modes for synthesis of nickel-palladium, nickel-copper and nickel-tungsten alloys with maximum catalytic activity are optimized. The synergism of nickel-tungsten and nickel-copper alloys is shown. Mon, 01 Jan 2007 00:00:00 GMT http://dspace.nbuv.gov.ua:80/handle/123456789/136993 2007-01-01T00:00:00Z