VOL 76, No. 11 (2003)

The conditions of soda hydration and their influence on the quality of the charge are considered. The modes of transportation and storage of the charge have been determined. Recommendations for loading and unloading the charge are given. Bibliography: 5 titles.

A laser installation and a technology for welding quartz fibers are considered. The results of testing the mechanical properties of welded fiber beams are presented. Il. 3, bibliography: 6 titles.

A technique for constructing experimental models of the process of drawing optical rods based on experimental data is considered. The obtained models make it possible to determine their permissible fluctuations in the selected area of ??change in technological parameters. Il. 1, bibliography: 4 titles.

The system Na ₂ O - SiO ₂, used in the design of compositions for the manufacture of gas microcontainers (microspheres), has been studied. Based on the well-known equation, an expression for the dependence of the hydrogen permeability coefficient of glasses on the silicate modulus is obtained. It was found that an alkaline modifier, even in the form of an impurity, can affect the gas permeability. It is concluded that it is necessary to apply criteria-based assessment in the design of glasses. A nomogram was obtained to determine the silicate modulus, hydrogen permeability coefficient, phase composition, and the probability of glass formation in the Na ₂ O - SiO ₂ system. Tab. 1, ill. 2, bibliography: 9 titles.

Considered are promising unconventional raw materials for the production of aluminosilicate ceramics: porcelain stones, in particular quartz-sericite, kaolin from the Zhuravliny Log deposit, complex additives represented by magnesium-containing minerals (talc, marble, diopside, dolomite). Tab. 1, bibliography: 7 titles.

The composition and microstructure of UV-46 and M-23 electric porcelain are considered, and their basic physicochemical properties necessary for the creation of certain types of insulators intended for operation in a wide temperature range are described. Particular attention is paid to the dielectric properties of porcelain for electrical purposes, methods for their improvement are given. Tab. 3, bibliography: 10 titles.

The sequence of the appearance of the silicon nitride phase in the volume of the initial silicon grain upon heating in a nitrogen gas atmosphere is traced. Technologies for the manufacture of ceramic products based on silicon nitride are proposed. Il. 8, bibliography: 2 titles.

The results of experimental studies on the optimization of the sintering process of bioactive composite materials based on a silicate matrix and hydroxyapatite are presented. To assess and predict the technological, mechanical and biological properties of materials, a sintering index is introduced, which is the ratio of the specific surfaces of the matrix and filler powders. The functional dependence of the sintering index on the content and granulometric composition of the filler was revealed. Sintered composite materials can be used to make intraosseous dental implants. Il. 2, bibliography: 4 titles.

The possibility of using manganese-containing waste from the Kemerovo Metallurgical Plant as a dye for insulating glass has been investigated. It has been established that in the case of processing waste by magnetic separation and changing the melting mode, this waste can be used to obtain a stable glass color. Tab. 5, bibliography: 4 titles.

The main trends in the development of modern methods of decorating glass and glass products are considered. A method for decorating glass products by the method of plasma spraying of glass wares is proposed. Bibliography: 19 titles.