VOL 87, No. 4 (2014)

The influence of the particle size of the charge and its mixing on the structure and properties of the foam slag glass is considered. At different temperatures, samples of foam slag glass were synthesized from a charge with different duration of mixing-grinding. Additional mixing of the charge makes it possible to obtain foam and slag glass with an improved macro- and microstructure.

A method of recording modified regions of an extended shape and complex structure, which can act as waveguide microstructures in the bulk of porous glass plates impregnated with solutions of silver salts, under the action of continuous radiation of an ytterbium fiber laser with a wavelength of 1.07 ?m, is considered. The results of studies of modified regions of an extended shape by optical methods are presented. Such microstructures in the volume of glass may well become the basic elements of fiber-optic systems for various purposes.

The features of the application of the multiple regression method for the mathematical description of technological processes in glass production are considered. The description of the methodology for choosing the structure of the regression model based on the analysis of the variation of the dependent variable in the normal course of the analyzed process is given. The efficiency of using the proposed technique in describing the technological process of forming a glass ribbon in a float bath is shown.

A composite material based on ?-Al ₂ O ₃ and two types of carbon nanotubes obtained from a methane-hydrogen mixture and a propane-butane mixture has been synthesized. The results of vacuum sintering and a comparative analysis of the structure of the obtained material are presented depending on the type of nanotubes and their content 3 - 24% (by volume). A composite with a uniformly crystalline structure and a uniform distribution of nanotubes in the matrix was obtained, demonstrating an increase in bending strength up to 400 MPa.

A set of works on the creation of a technology for the manufacture of various products from materials based on silicon nitride is presented. Technologies make it possible to manufacture products of the widest range of applications - from porous corrosive media permeable for filtration to those close to theoretical density for structural parts.

A description of the installation for determining the ultimate strength of refractory materials in compression at elevated temperatures is considered. The values ??of the ultimate compressive strength of periclase-carbon materials in the temperature range 20 - 500 ° C are given. The analysis of the process of destruction and strength characteristics is carried out.

The results of studies of the effect of a complex additive containing sodium tripolyphosphate and a resorcinolfurfural oligomer on the processes of wetting hard surfaces are presented. It is shown that the work of wetting an aluminum plate with solutions with a complex additive is significantly higher than the total work of wetting with solutions containing individual components of the complex. The investigated complex additive increases the wetting of the Al ₂ O ₃ surface, which contributes to a decrease in the free surface energy at the solid - solution interface.

Comprehensive studies of ozokerite production wastes from the Borislavskoye deposit (Lvov region, Ukraine) have been carried out. Based on the data of X-ray phase, differential thermal, petrographic analyzes, as well as the determination of the main physical and ceramic properties of wastes and compositions in combination with such additives as secondary kaolin of the Murzinsky deposit, primary alkaline kaolin of the Dubrovskoe deposit and fly ash of the Ladyzhinskaya TPP, their efficiency was established. use in compositions of masses for obtaining building ceramics. The introduction of waste into the masses makes it possible to reduce their sensitivity to drying, to intensify the molding process, and during firing it provides a decrease in the consumption of the main heat carrier.