VOL 72, No. 10 (1999)

A relationship has been established between the refractive index, specular reflection coefficient, Vickers microhardness, chemical resistance of sol-gel films and their thickness, tendency to crystallization, structural features and composition. Tab. 1, ill. 3, bibliography: 11 titles.

The method for calculating the wave-like deformation of sheet glass during its movement in the heating furnace has been refined. It is revealed that for a multi-support design scheme, the traditional calculation gives approximately a twofold error in deformations. Il. 2, bibliography: 3 titles.

A number of radiation (paramagnetic and optically) resistant oxide glasses have been developed. Some areas of their application are indicated. Bibliography: 2 titles.

New technological parameters have been developed for molding pottery on a semi-automated production line. The laborious process of molding large-sized pottery has been mechanized, technical, economic and quality indicators have been improved, rejects have been reduced, and productivity has been increased. Tab. 2, ill. 1, bibliography: 2 titles.

The results of studies on the use of carborundum slab breakage for the manufacture of a finely dispersed heat-resistant capsule by slip casting are presented. The main physical and mechanical properties of the investigated masses based on plate breakage are not inferior to the mass prepared on the basis of silicon carbide. Experimental batches of capsules of various shapes had good performance properties. At the same time, the prime cost of the capsule is reduced by about 3 times. Tab. 3, ill. 2, bibliography: 6 titles.

The reasons for the change in the structure and properties of the porcelain mass subjected to aging are analyzed from the standpoint of using the patterns of development of microbial communities. It is shown that when a nutrient substrate is added to the porcelain mass, the vital activity of the natural microflora is stimulated, which is accompanied by a favorable change in the coagulation, condensation structure. This intensifies the sintering process and improves the degree of "maturation" of the porcelain. Tab. 8, ill. 2, bibliography: 31 titles.

Compositions of ceramic pigments for coloring glaze and flux coatings using the powder method and the co-deposition method have been developed. Comparative characteristics of the chromophore properties of the obtained pigments are presented. The expediency of using the co-deposition method for the synthesis of ceramic pigments is shown. Tab. 3, ill. 2, bibliography: 4 titles.

The composition of a rigid molding mixture for the manufacture of concrete-ceramic solid bricks by pressing or vibrocompression has been developed. The brick has standard dimensions, beige or light red and meets the requirements of GOST 530-95. The cost price of a brick is 30 - 35% lower than that of a similar ceramic one, due to the exclusion of the firing operation from the technological cycle.