An experience of physical and chemical analysis of some fragments of medieval glazed ceramics, discovered at different times in the area of ??medieval settlements located in the Chui, Talas and Kochkor valleys of Kyrgyzstan, has been undertaken. Samples of glazed ceramics have been studied by X-ray fluorescence and microscopic analyzes. Physicochemical studies of glaze ceramics from different archaeological complexes on the territory of Kyrgyzstan made it possible to identify dyes, their features, technology for obtaining color and to note important points in the historical development of pottery related to the history of glazed ceramics in Central Asian countries.
Using the example of glass of composition 15Na 2 O * 10CaO * 75SiO2, the possibility of forming current-carrying buses on an electrically conductive coating by the & # 171; cold & # 187; gas-dynamic spraying
An informational analysis of the yield of suitable glass in the production process has been carried out. The influence of waste from individual production stages on the utilization rate of glass is shown. A model was compiled using fuzzy systems to describe the dependence of the utilization rate of glass on the chemical composition of the charge, glass and technological modes of molding and annealing of a glass ribbon. The proposed method for analyzing the utilization rate of glass can be used in quality management systems in the production of flat glass by the float method.
A radio-absorbing glass, transparent in the visible region of the spectrum, has been developed. The radioprotective effect was obtained by implanting accelerated ions of transition elements into the surface layer of glass, not exceeding 100 nm, which form nanoparticles in the glass that absorb electromagnetic radiation.
Measurements of the absorption of electromagnetic radiation (EMR) by implanted model and sheet glasses showed that the attenuation of the EMR power is in the range of 6.2 - 30.2 dB for phosphate glass and 7.8 - 34.1 dB for silicate glasses. The greatest radioprotective effect is observed on glasses implanted with Ni + nickel and Co + cobalt. EMI absorption can be increased to 37.5 dB by heat treatment
A technology has been developed for the production of glass-silica based on the wastes of enrichment of ferruginous quartzites of the Kursk Magnetic Anomaly (KMA) of the Lebedinsky GOK and fractionated broken glass of colored container glasses. The use of wastes of enrichment of ferruginous quartzites KMA allowed to reduce the sintering temperature and improve the quality of glass silica. The obtained glass silica has high operational and aesthetic-consumer properties.
The substantiation and development of a methodology for a comprehensive study of the physical and mechanical properties of ceramic compositions of the system grain - ceramic binder - pores using nonparametric regression analysis are considered. Its algorithm and implementation example are given.
The possibility of obtaining ceramic fibers of zirconium oxide by electrospinning is considered. The factors influencing the fiber diameter and the presence of tape inclusions have been established. It is shown that molding solutions under the action of an electric field make it possible to obtain fibers in a wide range of viscosities. When the values ??of the viscosities of the molding solutions are 0.45 & mdash; 0.69 Pa * s, the stability of the fiber production process is achieved, while the fiber diameter is comparable to the diameter of the fibers obtained by the traditional method (0.9 - 1.5 ?m)
It is noted that significant (but usually & # 171; shadow & # 187;) parameters of magnetic separation of liquid-dispersed media (suspensions, including ceramic, for the separation of the dispersed phase of impurities of ferroparticles) are their dynamic viscosity and density of the medium. The temperature dependences of the viscosity of the slip and its dispersion component (water) are compared, variants of their description in the operating temperature ranges by functions of exponential and logarithmic forms, respectively, are given, which may also be valid for other media, including those used for other, non-industrial, purposes. The functional form of such a dependence for a slip is used in basic expressions for the efficiency and limiting rate of its filtration magnetic separation - with a convenient in practice legalization of the slip temperature in these expressions
The issues of restoration of old brick buildings are considered. Compositions of new restoration dry building mixtures with increased operational properties, recommended for restoration work, are proposed. The results of physicochemical research methods (X-ray diffraction, electron microscopic) of the original hydrite binder and the restoration dry construction mixture obtained from it are presented. There is a list of technological operations for the restoration of the facades of brick buildings
When using almost all types of additive technologies, it is mandatory to use a binder with further heat treatment of the finished product. The binder compositions can be very diverse. Correct selection of the composition and properties of the ceramic powder - binder system at all stages of the process allows creating high-performance installations for producing parts of complex shapes. Presented are studies on the development of a binder composition for oxide aluminum-zirconium powders
