VOL 79, No. 4 (2006)

The refractive indices and thickness of double-sided sol-gel coatings of different compositions, applied by dipping onto float glass sheets, have been measured. It was found that the refractive index on the upper side of the sample, which was in contact with the protective atmosphere of the melt pool during the production of glass, is greater, and the film thickness is less than on the lower one. This is due to the difference in the properties of the opposite sides of thermally polished glass and is associated with a different concentration of tin in the surface layers. Tab. 1, bibliography: 9 titles.

A technique has been developed for determining the chemical composition of medical glass by arc-excited atomic emission spectroscopy. Sample preparation for measurements does not require the use of acids and alkalis and consists in rubbing the glass sample and subsequent dilution with an appropriate buffer solution. Metrological indicators of measurements allow analysis in a regulated range of concentrations of the main elements of glass in accordance with GOST 19808-86. Tab. 3, bibliography: 4 titles.

Compositions of condensed matter are calculated using thermodynamic modeling methods taking into account the existence of solid and liquid solutions from TiO ₂, TiO, Ti ₂ O ₃, Ti ₃ O ₅ and Ti ₄ O ₇, as well as partial pressures {TiO ₂}, {TiO}, {Ti}, {O ₂}, {O}, formed by heating the starting titanium dioxide in argon at a pressure of 9.8066 x; 10 ^-2 MPa in the temperature range 300 - 2485 K. The results obtained can be useful in describing chemical transformations occurring under conditions of high-temperature synthesis of complex types of ceramics with the participation of titanium dioxide, and in analyzing their composition. Tab. 1, ill. 3, bibliography: 8 titles.

Methods used to analyze the regularities of the course of thermally activated processes are considered. It is shown that the most informative and reliable are non-isothermal methods. On the example of alumina materials modified with eutectic additives of the systems MnO - Al ₂ O ₃ - SiO ₂, CaO - ZnO - Al _{2 < / sub> O 3 - SiO 2 and ZnO - TiO 2, it was found that the densification kinetics obeys the first-order formal kinetics equation. The apparent activation energies of sintering have been determined. Calculation of the laws of sintering by methods of non-isothermal kinetics allows you to design the modes of heat treatment of products. Il. 1, bibliography: 4 titles.}

JSC "Salavatsteklo" is a dynamically developing enterprise. Today, ten main technological workshops produce sheet, architectural and construction and electrochemically painted glass, stalinite and triplex, mirrors and multilayer bulletproof glass, glass units and glass containers, soluble sodium silicate and liquid glass. A radical modernization of production, constant improvement of the quality of products made it possible for the enterprise to be among the leaders in the industry. Il. 2.

A fluoride-free paste for glass matting and decoration has been developed. Examples of its application are given. Il. 5.

It is shown that the introduction of up to 15% pyrite cinders into ceramic masses significantly improves the frost resistance of tiles, while water absorption decreases disproportionately to frost resistance. A significant increase in frost resistance is facilitated by a uniform distribution of pores with a size of 10 ^-6 -10 ^-7 m. 4, ill. 2, bibliography: 8 titles.

The design is considered and the results of the introduction into production of a circular grinding tool with a diameter of 600 mm based on a reusable body with a groove in diameter, in which elements pressed from a bond with a surface diamond-bearing layer are fixed, in the form of overlapping parallelepipeds and with a gap between the cutting layers of elements are presented. Il. 2, bibliography: 2 titles.

The possibility of obtaining matte low-melting coatings for ceramic products fired in a long-term mode, based on the system Na ₂ O - MgO - CaO - B ₂ O _{3 -Al 2 O 3 - SiO 2. The results of studying glazed glasses and coatings by methods of X-ray phase analysis, electron microscopy, infrared spectroscopy, etc. are presented. The relationship between the structure and phase composition of coatings and their qualitative characteristics is established. The main properties of synthesized matte glazes are indicated. Il. 3, bibliography: 9 titles.}

The results of research on optimization of parameters of technological processes and equipment for hardening of insulating parts of insulators with different thickness and complex configuration are highlighted. The developed technical solutions are considered, which ensure the improved quality and reliability of insulators. Tab. 1, ill. 3, bibliography: 2 titles.

The results of an experimental study of heat losses through the enclosing structures of an operating brick kiln, carried out using a thermal imager, are presented. Il. 3, bibliography: 2 titles.