VOL 77, No. 10 (2004)

Various designs of screw feeders for glass batch components operating in "rough" and "precise" dosing modes are considered. Il. 4, bibliography: 3 titles.

A method of melting glass in a direct mono-uniform thin flow from a mechanochemically activated charge is proposed, which allows obtaining a homogeneous defect-free glass melt and intensifying all stages of the glass-making process. Il. 2.

A method of constructing and implementing a zonal mathematical model of heat transfer in a glass-making furnace with a horseshoe-shaped flame direction, with a capacity of 300 t / day, is considered. The boundary conditions of modeling are considered in detail. The results of calculating the external heat transfer and hydrodynamics of the furnace pool, as well as the regression equations for the temperature fields for the refractory masonry of the flame space and the surface of the melt are presented. Il. 5, bibliography: 5 titles.

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.

A method for determining acid and alkali resistance of ceramic materials has been developed and certified. The numerical values ??of the acid and alkali resistance of various ceramic materials and powders have been determined using a unified technique. The possibility of designing a chemically resistant ceramic material with predetermined numerical values ??of acid and alkali resistance is shown. Tab. 6, bibliography: 2 titles.

It was shown that the addition to the initial mixture of SrCO ₃ and ZrO ₂, taken in a stoichiometric ratio to obtain SrZrO ₃, of a pre-synthesized powder resulted in combining synthesis with sintering of denser ceramics than without addition. The reasons are a decrease in the degree of nonequilibrium of the workpiece compaction process due to a slight increase in friction between particles and a decrease in the likelihood of local compaction. The influence of an increase in internal friction at the bifurcation point is comparable to the influence of external disturbances and internal fluctuations (noise), which leads to instability of the results. Tab. 1, bibliography: 4 titles.

The factors influencing the efficiency of applying glass enamels by electrophoresis have been investigated. It has been established that the most dense and uniform coatings are obtained on steel samples with preliminary deposited nickel. The optimal composition of the slip has been obtained, and the mode of applying the glass coating by electrophoresis has been established. Tab. 4, ill. 1, bibliography: 5 titles.

The technique of creating an environmental management system using the process approach is considered on the example of JSC "Borsky glass plant". Il. 3, bibliography: 3 titles.

A wide range of traditional aluminosilicate refractory materials for the construction and repair of glass-melting furnaces - chamotte, mullite-silica, mullite, mullite-corundum, produced by JSC "Borovichi Refractory Plant" is considered. Tab. 5, bibliography: 6 titles.