VOL 76, No. 2 (2003)

Methods for calculating temperature fields in flat and cylindrical glassware are considered. The advantages of numerical methods for calculating temperature fields in comparison with analytical methods for complex shapes of products and the conditions of the heat transfer processes occurring in this are shown. Bibliography: 9 titles.

Based on the adaptation of the theoretical Thurnball - Cohen equation, the temperature-concentration dependence of the linear crystal growth rate (LSRC) of diopside for potassium-containing glasses of the CaO - MgO (Al ₂ O ₃) - SiO system was revealed ₂ and the dependence of LSRC of devitrite and cristobalite on the chemical composition of glasses located in the corresponding regions on the phase diagram of the Na ₂ O - CaO - SiO ₂ system was established... Tab. 4, ill. 2, bibliography: 6 titles.

The possibility of obtaining uniform precipitates of aluminum oxide of sufficient thickness from its suspensions in an aqueous medium with the addition of an electrolyte is considered. The effect of the concentration and nature of the electrolyte on the thickness, moisture content, specific yield, and the rate of sedimentation is shown. Il. 1, bibliography: 4 titles.

The results of theoretical calculations and experimental studies of the structure of the three-component system BaO - Al ₂ O ₃ - SiO ₂ in the subsolidus region at temperatures of 1200 - 1400 ° C are presented.... A complete partition of this system into elementary polytypes is carried out, a topological graph of the relationship of these polytypes is given, and a geometrotopological characteristic of binary and ternary compounds included in its composition is given. Tab. 2, ill. 2, bibliography: 26 titles.

The dependences of the LTEC of an engobe coating on the LTEC of its constituent components have been investigated. It was found that the TLEC of the contained frit, as well as the amount of sand, has the greatest influence on the LTEC of engobe coatings. Additives-modifiers were selected to correct the rheological properties of the engobe slip and the whiteness of the engobe. Il. 2, bibliography: 3 titles.

New compositions and technology for obtaining low-temperature decorative coatings on glass containers have been developed. The coatings are distinguished by a wide variation in surface texture (from satin to embossed) and good adhesion properties. Tab. 1, bibliography: 2 titles.

On the basis of p- and d-element oxides, thin films were obtained by deposition from film-forming solutions. Compositions based on oxides of group IV of the periodic system, yttrium and elements of the iron triad have been created. Changing the ratio of components allows you to control the optical properties of films used as coatings that protect against UV radiation, selectively absorb the visible region of the spectrum and sunscreen color correcting. Tab. 1, ill. 5, bibliography: 5 titles.

The methods of X-ray electron spectroscopy and atomic force microscopy are used to study thin films of quartz on steel and copper obtained by the method of cathodic sputtering of silicon in oxygen. The kinetics of film formation is considered. Tab. 2, ill. 4, bibliography: 22 titles.

A method has been developed for predicting changes in the bearing capacity of composites based on cement matrices using various types of glass fibers as reinforcing components. The method can be used in the design of building glass fiber cement structures intended for long-term operation. Tab. 3, ill. 4, bibliography: 17 titles.

An enterprise for the enrichment of primary Angren kaolins, which are suitable for the production of porcelain, faience, refractories and other types of technical ceramics, was commissioned in Uzbekistan.