The nature of the concentration dependence of the molar volume of three-component aluminosilicate glasses, in which the content of R 2 O (or RO) exceeds the content of Al 2 O 3 , is determined by the degree of depolymerization structural glass mesh. In glasses with an equimolar content of R 2 O (or RO) and Al 2 O 3 , the molar volume is additive and depends on the partial values ??of the molar volume of "silica "and" aluminate "constituents of the structural grid. Tab. 2, ill. 4, bibliography: 12 titles.
The physicochemical features of the processes of drying bulk silica gels formed from mixed sols - tetraethylorthosilicate hydrolyzate: aerosil - are considered. The results of experimental studies of the kinetic curves of drying bulk-molded silica gels depending on the conditions and modes of the processes are presented. Il. 7, bibliography: 8 titles.
A method of strengthening parts of molded equipment by boriding is considered, the regularities of changing the dimensions of parts during boriding are given, the issues of mechanical processing of borated parts and the peculiarities of using diamond and other pastes and powders are highlighted. Bibliography: 4 titles.
The analysis of the literature on modifying the surface of sheet glass to give it heat-shielding, conductive, hydrophobic, X-ray shielding, decorative and other properties is carried out. Various industrial and scientific associations engaged in the production and development of modifying coatings are represented. The classification of film coatings is given and their main methods of obtaining are considered. The influence of various factors on film coatings is analyzed. Il. 3, bibliography: 36 titles.
The possibility of obtaining tinted glasses of various shades, which can be used as a building and decorative-architectural material, is shown. Tab. 1, ill. 1, bibliography: 1 titles.
The general technique, algorithm and results of machine modeling of the nature of destruction of tempered sheet glass under conditions close to testing of real products are presented. Recommendations for further improvement of the program are formulated. Il. 2, bibliography: 2 titles.
It is shown that the structure and properties of oxide sol-gel films depend on the total mass content of film-forming oxides in the solution and are caused by different degrees of non-equilibrium of physicochemical processes. The existence of fairly clear relationships between the viscosity of solutions, the features of the microstructure, and some properties of the films has been established. Tab. 3, ill. 2, bibliography: 6 titles.
The process of obtaining light and heat absorbing glasses of a wide color gamut is considered. The scheme of interaction of various color centers associated with Se, CoO, FeO, Fe 2 O and their combinations is presented. The results obtained can be used in the production of high-quality, container, lighting and other types of glass. Il. 3, bibliography: 5 titles.
The change in the direction of oxidation-reduction equilibrium Fe (II) = Fe (III) and S (IV) = S (VI) during glass melting was investigated when sodium silicofluoride, an accelerator of melting, was introduced into the charge. Tab. 1, bibliography: 8 titles.
Using the sol-gel method of obtaining luminescent silicate materials, the kinetics of the process at the initial stages of hydrolysis and polycondensation of tetraethoxysilane at different temperatures and component ratios has been studied. A model of the process is proposed, and the rate constants of the reaction are determined. The conclusion is made about the limiting influence of the polycondensation stage up to the gelation point. Tab. 2, ill. 1, bibliography: 14 titles.
