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Hits: 15921
The results of mathematical and experimental modeling of the process of transverse cutting of float glass in the process of production by the method of laser controlled thermal splitting (LUT) are presented. The performed calculations and the experimental results confirming them allow us to conclude that it is possible to efficiently slit and cross cut a float glass ribbon using radiation from a CO
2 laser with a power of about 500 W
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Hits: 15890
A phosphate-based glass with various concentrations of Yb
3+ ions was synthesized and investigated, the composition of which made it possible to obtain optically homogeneous glasses in small-volume crucibles. The set of the main spectral characteristics of the obtained glasses is determined and it is shown that the proposed matrix provides a high quantum yield of luminescence in a wide range of Yb
3+ concentrations. The effect of the content of OH groups on the decay time of the luminescence of Yb
3+ ions has been studied. Taking into account its good melting and working properties, this glass appears to be promising for creating active media for solid-state and fiber laser devices in the near infrared range.
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Hits: 16218
An overview of the directions for improving the technological processes of foam glass production using mathematical modeling over the past 15 years is presented. The developments of leading scientists in the field under study are presented. The main provisions of the created mathematical models, their assumptions, areas of application and possibilities of use are stated. Revealed general patterns when using homogeneous and discrete approaches to solving problems of mathematical modeling
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Hits: 16180
Samples of glasses were synthesized using raw materials from the Ural region and decolouring agents; the chemical composition is selected for sheet thermally polished glass. It is proposed to discolor the molten glass with a complex additive: cerium oxide and potassium nitrate. The spectral characteristics of the glasses under study are presented and analyzed. Highest light transmittance reaches 93% at 750 nm
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Hits: 16430
The thermal properties of a series of synthesized rubidium and cesium borosilicate glasses have been studied by differential scanning calorimetry. The values ??of the glass transition and crystallization temperatures have been determined, and the change in the specific heat of these glasses at the glass transition temperature has been determined. The thermal study data are compared with the results of the study of structural features by IR spectroscopy. The information obtained makes it possible to adjust the parameters of the heat treatment of glass-containing materials depending on their composition, which is important for improving the matrix glassy materials used in the immobilization of radioactive waste.
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Hits: 16610
On the example of glass of composition 40P
2 O
5 ; 55ZnO; 4Ag
2 O; 1Ga
2 O
3 (molar content,%), the possibility of the simultaneous formation of luminescent silver nanoparticles and microsized birefringent regions, the properties of which depend on the polarization and intensity of the laser beam
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Hits: 16615
It was found that the samples of silicon-phosphorus-antimony ion exchangers obtained in the volumes of pilot batches are similar in properties to the samples obtained under laboratory conditions, and show identical characteristics during the regeneration of the potassium nitrate melt. In order to optimize the process of ion-exchange glass hardening, it is proposed to introduce two ion exchangers into the melt: K [Sb (OH)
6 ] for the sorption of Na
+ ions and silicophosphorus-antimony ion exchanger for polyvalent impurity ions
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Hits: 16873
The processes of glass powder melting, carbonate blowing agent decomposition and melt porization at different heating rates were investigated in order to identify the most optimal parameters of the technological process during the formation of foam glass. It is shown that a high heating rate is most preferable from the point of view of both reducing the duration of heat treatment and the efficiency of foaming.
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Hits: 17076
On the basis of the developed concepts of the dynamic equilibrium of energy and matter fluxes during phase transitions in nonequilibrium open systems, a thermodynamic model is proposed that takes into account the thermal force of growth of crystals of sitalls of metasilicate composition
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Hits: 17331
A scientifically substantiated applied technique for engineering calculation of the thermal resistance of the wall layer has been developed. the temperature of the melt and the composition of the glass melt in the melting basin to increase the accuracy of predicting the temperature regimes in the corrosive zones of the refractory enclosures of glass-making furnaces
