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Information × Registration Number 0219U100667, 0118U002193 , R & D reports Title Development of powder sintering technology under pulse current and microwaves in the variable nanoparticles size popup.stage_title Head Zhаlаt-Lozynskyi Ostаp B., Доктор технічних наук Registration Date 22-02-2019 Organization Institute for Problems in Materials Science popup.description2 Complex research on the technology of synthesis and consolidation of aluminum magnesium spinel and magnesium fluoride powders of various size was carried out. The optimum conditions of temperature regimes for obtaining spinel and magnesium fluoride are determined. It has been established that at different heat treatment, the crystallinity of magnesium fluoride powder changes from 8 nm to 180 nm at temperatures of 120 ° C and 800 ° C. Consolidated by spark plasma sintering dense nanocrystalline samples MgF2 at 800 C in nonlinear SPS modes exhibit a transparency value of ~ 70% in the wavelength range of 3.5-5.5 mkm with a slight decrease in the transmittance to the short-wave region. Samples of spinel, sintered in different technological regimes from nanocrystalline powders revealed the dependence of transparency on the mode of sintering. The results of IR spectroscopy studies showed that the highest transparency at a wavelength of 4.6 mkm was demonstrated by specimens that were sintered at a rate of 20 ° C / min and 10 ° C / min. - 67.2% and 66.4%, respectively. Product Description popup.authors popup.nrat_date 2020-04-02 Close