VOL 91, No. 9 (2018)

Complex studies of glass formation and determination of glass properties in the material system of materials quartz sand - colemanite - soda have been carried out. The possibility of using a multicomponent raw material of colemanite in the production of borosilicate glasses and glassware of various compositions and purposes has been established, and an assessment has been made of the prospects and efficiency of its application.

The factors affecting the thermal conductivity of ceramic composite materials based on SiC with additives B ₄ C, AlN, Si ₃ N ₄, Y ₂ O ₃, Al ₂ O ₃, HfB ₂, obtained by spark plasma sintering technology with a relative density of 99 & # 37 ;. Thermophysical properties were determined in the temperature range from 20 to 1300 ° C: heat capacity, thermal diffusivity and thermal conductivity of composites. Thermal diffusivity and heat capacity were measured by the laser flash method. The heat capacity measurements are supplemented by the results obtained by DSC and adiabatic calorimeter methods. Thermal conductivity is calculated from the data of thermal diffusivity, heat capacity and density.

An overview of the current state of theoretical studies of close-packed systems of hard spheres is presented. A description of the main models of regular and random dense packings of rigid spheres is given. Examples of the application of modeling of dense packing of rigid spheres for solving applied problems in the field of creating promising materials from ceramics, including refractories, are given.

A review of dissertations by Russian scientists on ceramics made of aluminum oxide, methods of its preparation for the period since 2000 is presented. Thin structural ceramics are mainly considered. The emphasis is on technological aspects. The second part of the review includes the synthesis of aluminum oxide nanopowders and their use for sintering, the sol-gel method for obtaining Al ₂ O ₃, other methods for the synthesis of fine and fibrous Al _{2 < / sub> O 3 for corundum ceramics}

The chemical and mineralogical compositions and physicochemical characteristics of the Yazyavan dune sands, as well as their suitability for use together with other raw materials of Uzbekistan to obtain optimal compositions of ceramic facing tiles, have been studied. It has been established that the mass content of dune sand in the composition of the ceramic mass of facing tiles in a triple and quadruple composition should be no more than 45 and 25 & # 37; respectively. The optimal technological parameters for the production of ceramic tiles using dune sands that meet the requirements of GOST 6141-91 have been determined

From 28 to 31 May 2018 at the Central Exhibition Complex & # 171; Expocentre & # 187; the leading exhibition of the achievements of the world and domestic glass industry was held in Russia - the 20th International Exhibition of Glass Products, Technologies and Equipment for the Production and Processing of Glass & # 171; World of Glass-2018 & # 187 ;.
In the official opening ceremony of the exhibition & # 171; World of glass-2018 & # 187; Vice-President of the Chamber of Commerce and Industry Dmitry Kurochkin, Vice-President of the Russian Union of Builders Sergey Kuchikhin, President of the Union of Designers of Russia Viktor Novoselov, Chairman of the Presidium of the Union of Glass Enterprises Nikolai Chuplygin, President of the Union of Rural Builders of Russia Sergey Mytarev and other officials.

The results of infrared studies of chemically modified zeolite raw materials from the Vanginskoye deposit, Amur region are presented. It has been shown that the effect of hydrochloric acid leads to such processes as decationation and dealumination. It was found that in the process of modification, the chemical composition changes, the degree of crystallinity decreases

The results of measuring infrared spectra and differential thermal analysis of a ceramic glaze frit are presented. The data obtained confirm the two-phase nature of the investigated frit and the presence of B ³⁺ ions in it, which are in triple and quadruple coordination. The presence in the investigated frit of two phases - a rigid silicate framework and low-temperature borosilicate with a moderate silica content can lead to the formation of microliquations

The composition and method of obtaining highly porous materials at low-temperature swelling of liquid glass and ash-and-slag material from the combustion of oil shale, used as a filler and burnout additive, are proposed. It has been shown that expanded clay based on water glass must be cooled at a rate of 60 ° C / min, since at such a cooling rate, a porous material with a high coefficient of structural quality and with the highest FeO content is formed.