VOL 82, No. 3 (2009)

Investigated the corrosion resistance of float glass in the process of climatic tests. It is shown that the main defects of the surface of tempered glass are leaching, "burn-in of paper and sulphurous film". The properties of various cushioning materials used in the domestic industry have been studied. The corrosion resistance of tempered glass depends on the surface quality of the original glass and the properties of the cushioning material used to package both the original glass and the tempered glass. Il. 5, bibliography: 3 titles.

On the basis of experimental data and calculations, it has been established that frost-resistant ceramics can be obtained from a mixture of fusible illite-containing clays without using other, more expensive refractory clays. The molding masses were compiled on the basis of mathematical planning of the "composition - property" experiment. With the optimal content of the molding mass, a sintered ceramic material was obtained that has frost resistance during bulk freezing - more than 250 cycles, with one-side freezing - from 75 to 125 cycles. Tab. 3, ill. 5, bibliography: 4 titles.

It is shown that it is possible to obtain ceramic tiles with satisfactory characteristics from low-quality polymineral clays by the method of semi-dry pressing. To do this, it is necessary to use the following methods to improve the quality of clay raw materials: processing of raw materials in an electric mass classifier, mixing clays with activated water, introducing technological additives into the raw materials (mechanically activated quartz-glauconite sands, refractory clay). The use of calcareous clays and zeolite-containing siliceous rocks makes it possible to expand the raw material base of tile production. Tab. 2, bibliography: 2 titles.

To expand the color gamut of the front surface of the brick, the engobing method was used. To control the color, a light-colored engobe composition was developed using red-burning clays, followed by coloring with the addition of various pigments. The rheological properties of engobe slip have been studied and the amount of electrolytes has been optimized. Il. 1, bibliography: 3 titles.

Investigated apodunite serpentinite by-products. It is shown that under the conditions of low-temperature firing, it is possible to obtain decorative and finishing products based on magnesium-containing man-made raw materials with satisfactory physical and mechanical properties - tiles for internal facing of walls and facades, tiles, ceramic bricks, and shingles. Tab. 2, ill. 3, bibliography: 1 title.

The results of synthesis and physicochemical studies of heat-resistant glass-crystalline coatings using high-alumina waste from the metallurgical industry, intended to protect nichrome alloys from high-temperature corrosion, are presented. The mechanism of sitallization of the glass matrix of the coating is revealed, the phase composition of both heat-resistant coatings and contact layers of nichrome-coating is established depending on the ratio of adhesion activators - NiO and CoO. Tab. 1, ill. 3, bibliography: 2 titles.

The results of using flotation waste of tungsten-molybdenum ores of the Kaitash mine as a fluxing component of ceramic masses are presented. The use of flotation waste in masses for ceramic tiles will make it possible to reduce the cost of finished products, reduce the firing temperature, dispose of waste and obtain products with the required technical properties. Tab. 2, ill. 1, bibliography: 1 titles.

Two samples of lacustrine diatomites of Karelia, differing in rock-forming species of diatoms, shape, size and degree of preservation of valves, were investigated. It was found that the size of the valves significantly affects the granulometric composition and physicochemical properties of diatomites. In the initial samples of diatomites, the content of SiO ₂ is 70%, and after heat treatment and leaching increases to 91%, the iron content sharply decreases to 0.075%. After removal of impurities, lacustrine diatomites are of interest for the production of sheet glass, crystal, glazes and enamels, silicic acid glasses, and ceramic products. Tab. 2, ill. 3, bibliography: 4 titles.

A feldspar material is proposed as a substitute for alumina when melting colorless bottle glass. The use of Turkish feldspar ESF501CGG at the Bunkovo ??experimental plant has given positive results. Bibliography: 3 titles.

The influence of silicon compounds on the processes of formation and development of natural bone tissue is considered, the concentration of silicon compounds in various tissues of organs is given. The inducing effect of various implantation substrates with silica content on the vital activity of osteogenic cell cultures is described. It is assumed that the processes of binding of bone tissue to silicate implantation material are influenced by the presence of a significant number of silanol groups on the surface of the material, which determine its high hydrophilicity. It is shown that the solubility of silicate glasses depends on the presence in their composition of a phase corresponding to the composition of liquid glass, and its role in the process of material biodegradation in physiological media is described. Table 1, bibliography: 14 titles.

Compositions suitable for the production of foam-teclocrystalline materials based on aluminosilicate raw materials (by the example of zeolite and diabase rocks) using a two-stage technology at temperatures not exceeding 900 ° C are considered. Criteria for evaluating the initial raw materials and compositions of glass granulate are established. It is shown that the use of aluminosilicate raw materials, when the established conditions are met, makes it possible to obtain a foam-glass-crystalline material with a density of 250 - 350 kg / m ³ and a compressive strength of up to 2 MPa. Tab. 3, ill. 3, bibliography: 4 titles.