VOL 75, No. 8 (2002)

The analysis of compositions and structural criteria of glasses for microspheres is carried out. A system of equations for modeling the compositions of microspheres is obtained, the limits of applicability of the model are established. A technique for designing glasses for microspheres with low hydrogen permeability and resistant to atmospheric corrosion is proposed. Tab. 3, ill. 3, bibliography: 9 titles.

Work has been carried out to optimize the distribution of the heat load over the burners and to develop a mode that ensures the melting of the charge no further than the second pair of burners in a glass-making furnace. Modes have been worked out that ensure complete combustion of fuel with an optimal amount of excess air. Recommendations for the rational organization of natural gas combustion for this type of furnace are given. Tab. 2, bibliography: 8 titles.

A method is considered, the use of which makes it possible to reduce tin oxides in the low-temperature part of the molten bath, where they are predominantly formed. On the basis of experimental data, a linear multiple regression equation is obtained that describes the effect of a protective gas medium on the reduction potential of the melt bath. Bibliography: 5 titles.

The nature of the change in the technological parameters of plastic ceramic masses, the moisture content of which approaches the lower limit of plasticity, is considered. It is shown that the use of vibration contributes to the "healing" of discontinuities in the mass continuity, a decrease in internal stresses and, with lower molding efforts, allows to improve the physical and mechanical properties of products. Il. 3, bibliography: 2 titles.

The advantages of quasi-isostatic pressing in batch production are shown. The versatility and cost-effectiveness of the method made it possible to widely introduce it for the mass production of products at a number of ceramic plants. Il. 5, bibliography: 4 titles.

The possibility of obtaining ceramic pigments with a mullite structure based on natural minerals - kaolinite and topaz - has been investigated. It was found that these minerals are promising for the synthesis of ceramic pigments. The resulting pigments are resistant to high temperatures and varied in color. Tab. 4, ill. 1, bibliography: 6 titles.

The interaction of oxides in the Al ₂ O ₃ - ZrO ₂ - MgO system has been studied in the preparation of ceramics using fibrous components. It was found that during the heat treatment of ternary systems, the component that stabilizes the tetragonal structure of zirconium dioxide interacts with the aluminum oxide matrix, forming spinel interlayers at the fiber-matrix phase boundary. The use of highly dispersed fibers as a starting component for the production of ceramics, as well as the addition of a fibrous filler to the gel-like matrix, makes it possible to obtain composite ceramics with increased strength. Tab. 1, ill. 2, bibliography: 7 titles.

The proposals of AI Kulikov on the development of power plants, in which high-modulus silicates are used as fuel, are considered in the scientific press. On the basis of thermodynamic estimates, the conclusion is substantiated that it is impossible to create such installations. Bibliography: 7 titles.

It is shown that the quartz sand of the Khojikul deposit is suitable for use in the glass and ceramic industries. Tab. 1, ill. 2.

The reasons for the appearance of defects in the production of mirrors at the WATT 1600-3M installation have been analyzed. Recommendations are given for improving the installation and the spraying process. Il. 1, bibliography: 5 titles.