The influence of a modified coating applied to the surface of foam glass on the ability to absorb electromagnetic radiation in the high-frequency range is considered. It was found that the coating obtained on the basis of a liquid glass composition with ilmenite with a particle size of 3 microns improves the radio-absorbing characteristics of the foam glass. When contained in the composition of the coating 1.5 & # 37; ilmenite, the absorption coefficient of foam glass at a frequency of 120 GHz increases by 4 times, at a frequency of 260 GHz - 2 times in comparison with foam glass without coating
On the basis of a patent search and theoretical calculations of physicochemical properties, the compositions of enamels were selected and refined, which were synthesized and investigated for consistency in LTEC with the metal, for resistance to alkaline solutions at elevated temperatures. The best characteristics in terms of resistance to alkaline solutions were shown by the frit of the composition ShchSF-1. The corrosion rate (test temperature for alkali resistance 80 ° C) of the enamel coating was only 0.015 g / (m2 h), which is 20 times lower than the corrosion rate of chemically resistant MK-5 enamel
The dependences of the ultimate strength in compression of diatomite on temperature in the temperature range of 50 - 700 ° C are investigated. The ultimate strength in compression at a temperature of 450 - 500 & # 176; C exceeds the strength values ??under normal conditions by about 2 times. This makes it possible to streamline the process of heating diatomite-based lining of high-temperature aggregates.
Various methods of protecting the surface of silicon substrates for the manufacture of silicon transistors have been proposed. The results of thermal operations with technological modes of obtaining a low-melting glassy layer in order to protect the surface of pn-junctions substrates from various external influences are presented.
Some properties of fused basalt and clay materials, as well as compositions based on them, for obtaining wear and corrosion resistant coatings for pipes of steam boilers at TPPs have been studied. It is shown that fused mineral raw materials can be used in compositions with liquid glass in the development of compositions of protective coatings. Materials based on fused pyroxene waste with the addition of basalt fiber, the mass content of which does not exceed 50%, have the highest chemical resistance and wear resistance.
The electrochemical behavior of electrodes with an active layer based on TiO 2 , IrO 2 , RuO 2 , SnO 2 has been studied. The values ??of the current-free potentials are determined. The dependences of the rate of the anodic processes of chlorine and oxygen evolution on the composition of the electrode are presented.
The work is devoted to the creation of a technology for the formation of the required microrelief of optical surfaces of glass-ceramic substrates. The solution of the problem is shown using controlled local deposition of silicon dioxide on the surface of coatings by laser pyrolysis of tetraethoxysilane vapor in the presence of ozone. The characteristics of experimental samples, their comparison with the data of mathematical modeling of the results of technological processes are presented. The possibility of using the developed technology for profiling substrates with large radii of curvature for the subsequent deposition of multilayer coatings of interference spherical mirrors is shown.
Glass-ceramic composite protective technological coatings have been developed in the systems Na 2 O? B 2 O 3 ? SiO 2 and BaO? Al 2 O3? SiO 2 for deformation under isothermal conditions in air of intermetallic alloys of the Ti? Al? Nb, Ni? Al? Co systems. The physicochemical and technological properties of coatings have been investigated, the effectiveness of their application has been shown.
Transparent electroconductive coatings on glass substrates (transparent electrodes) based on functionalized multi-walled carbon nanotubes have been obtained. The effect of glass pretreatment with 3-aminopropyltriethoxysilane on the coating process has been established. Composite transparent electrically conductive films on glass made of PEDOT: PSS polymer and multi-walled carbon nanotubes were obtained; the resistance of such a film was 180 Ohm / cm 2 with a transparency of 83%
The compositions of reflective coatings for gas-discharge light sources of various types and production technologies are described. Experimental research results are presented and the compositions of experimentally selected coatings for metal halide and sulfur high-frequency lamps are given.
