VOL 90, No. 6 (2017)

The main methods for obtaining gradient optical elements are presented, among which ion-exchange diffusion occupies the dominant place. A new method for obtaining gradient optical media, based on the discovery of anion-halide transfer in solid glasses, is noted. Methods for measuring the profiles of the refractive index distribution implemented in practice are considered as an issue that occupies a special place in the technology of gradient optical elements and is one of the independent scientific problems. It is shown that in a number of cases, due to the size effect, it is advisable to correct the modes of ion-exchange processing empirically.

It has been shown that it is possible to form nanoclusters and gold nanoparticles in potassium aluminum phosphate glass during heat treatment in the temperature range below T _g, which have luminescent and plasmonic properties depending on the size.

Samples in the form of ingots of aluminum oxynitride (alona) Al ₅ O ₆ N were obtained by SHS metallurgy using thermite-type mixtures. The experiments were carried out in SHS reactors at an initial nitrogen pressure of 5 MPa. The optimal conditions for the synthesis of the phase of the most stable aluminum oxynitride Al ₅ O ₆ N. The modes of grinding synthesized ingots into powders of certain fractions have been developed. By the method of spark plasma sintering (IPA), prototypes with high density, hardness and light transmittance were obtained from them.

The preparation of composites based on nanopowders synthesized by the sol-gel method in the system of aluminum oxide and tetragonal zirconium dioxide stabilized by cerium cations (Al ₂ O ₃ - [Ce-TZP]) is described.... It is shown that the modification of the compositions with calcium oxide promotes the formation of a dispersion-strengthening phase in the form of long-prismatic grains during the sintering of composites. The presence of this phase affects the increase in strength and resistance to brittle fracture of composites with both the ZrO ₂ matrix and the Al ₂ O ₃ matrix. The static bending strength of composites reaches 1000 MPa, and the fracture toughness K _1s increases to 11.0 MPa m ^1/2

The 19th International Exhibition of Glass Products, Technologies and Equipment for the Production and Processing of Glass & # 171; World of Glass - 2017 & # 187;, held from 5 to 8 June 2017 at the Central Exhibition Complex & # 171; Expocentre? became the main event of the year for the glass industry in Russia. International status of the exhibition & # 171; World of glass & # 187; confirmed by the marks of the Global Association of the Exhibition Industry (UFI) and the Russian Union of Exhibitions and Fairs (RUEF). The exhibition, organized by & # 171; Expocentre & # 187;, was held with the support of the Ministry of Industry and Trade of the Russian Federation, under the patronage of the Chamber of Commerce and Industry of the Russian Federation.

The features of the formation and thermal stability of MnO _x -CeO ₂ nanodispersed systems have been investigated. The composition, structure, charge state and porosity of the obtained systems were investigated using the methods of XRD, XPS, HRTEM, RFLA, low-temperature nitrogen adsorption.

The advantages and disadvantages of heat-insulating materials offered in the construction market of the CIS are stated. It is noted that, in terms of the totality of characteristics, foam glass surpasses known insulation materials, having, however, a high cost due to the energy consumption of production, which makes it uncompetitive. A new promising direction is considered - low-temperature synthesis of glassy foamed heat-insulating materials based on waste products from phosphate ore processing industries. The developed technological process ensures the production of a foam material with high technical and operational properties and is characterized by the absence of energy-consuming stages. Foaming temperature is 250 - 300 & # 176; С

Using the method of kinetic colorimetry, the degree of polymerization and sizes of silicon-oxygen anions in solutions of water glass were studied depending on the silicate modulus, on the density (concentration) of silica, and also on the nature of the alkaline cation. With an increase in modulus above 2.6 and density above 1.3, the degree of polymerization increased markedly. Moreover, the modulus of liquid glass was the most significant factor in the range of characteristics studied. After exceeding the critical values ??of the silicate modulus and the concentration of soluble silicate, the system from a true polyelectrolyte solution, characterized by the presence of discrete polymer anions, goes to the state of a coherent-dispersed colloidal system with a high degree of bulk polymerization

The structure and properties of the developed high-alumina products based on aluminosilicate fiber are shown. The application of the developed NK-29 products in the lining of high-temperature thermal units used in the ceramic industry is considered.