The effect of thermal gas nitriding of the surface of window, medical, vacuum and crystal glass on their performance has been investigated. The hydrophobicity, water resistance, microhardness, impact strength and heat resistance of glasses were studied depending on the duration of nitriding with various nitrogen-containing gas reagents. Technological recommendations are given for thermal gas nitriding of glass products in production conditions. Tab. 2, bibliography: 6 titles.
The formation of nanoparticles of a semiconducting compound of lead sulfide in silicate and borosilicate glass matrices has been studied. The dependence of the size of PbS nanoparticles on the temperature-time conditions of heat treatment has been determined. The bleaching effect arising in these nanostructured glass materials has been established. The developed glasses can be used as solid-state passive switches in lasers emitting in the near-IR region of the spectrum. Tab. 1, ill. 3, bibliography: 6 titles.
Using silicate optical flints as an example, the effect of the basicity of the composition on the bubbling of glass has been studied. It was found that an increase in bubbling is symbatic with an increase in the content of ferrous iron and an increase in the basicity of the glass. It has been shown that an increase in the concentration of clarifiers does not lead to a decrease in bubbling. Tab. 5, bibliography: 6 titles.
The data on the improvement of the main technical and economic indicators of glass-melting furnaces in the leading countries and JSC "Salavatsteklo" are presented. The issues of improving the design of furnaces and modes of their operation are considered, the solution of which will increase their thermal and technological efficiency, extend the campaign and improve the quality of products. It is shown that the optimal options for refractory masonry and thermal insulation of the most critical elements of the furnace design provide a significant increase in their operational reliability. Il. 2, bibliography: 3 titles.
On the basis of a model describing the mechanism of the appearance of internal stresses in glass during its cooling, the calculation of the limiting temperature of opalescence is given. The concept of an area of ??increased mobility of structural elements is introduced, which is identified with the area of ??glass softening. Il. 2, bibliography: 8 titles.
Possibilities of improving the protective properties of borosilicate melts by introducing deoxidizers are considered. The dependence of the oxidation rate of steel 30KhGSA on the Fe 2 O 3 content in the melt has been experimentally established. The rate of oxidation of steel 30KhGSA in a melt deoxidized with silicon carbide and silicon nitride, as well as a boron-containing product, has been determined. Tab. 1, ill. 4, bibliography: 2 titles.
Experimental data are generalized and a universal formula is obtained for calculating the diffusion coefficients of SiO 2 in melts of the Na 2 O - SiO 2 system. The formula is recommended for practical calculations of the lump silicate boiling process. Tab. 4, ill. 2, bibliography: 6 titles.
A process model for the production of triplex has been built. The efficiency of using statistical control methods to improve the quality of the generated triplex is shown. Il. 3, bibliography: 5 titles.
The reasons for the formation of streaks during the melting of electrovacuum strontium glass have been determined. The implementation of the developed measures has improved the quality of products. Tab. 1, ill. 4, bibliography: 10 titles.
The expediency of building a CAD system for a glass-melting furnace is shown. The general provisions of the mathematical support of the CAD technological subsystem are formulated. The principles of constructing a mathematical model of the thermal operation of the furnace are stated. Basic equations are presented that provide a joint solution of the external and internal problems of heat and mass transfer, taking into account the specifics of the physicochemical aspects of the glass-making process. Bibliography: 14 titles.
