A new method for calculating the structural parameters of glass membranes is proposed, which allows calculating the average coordination number, specific surface area, average radii of the necks of spherical pores (interporous bridges) of membranes and the tortuosity coefficient of membrane capillaries from ex-perimental values of porosity, the average radius of capillaries and spherical pores of membranes. The proposed method is used to analyze the structural parameters of membranes in comparison with known methods and experimental data
The article presents data on the possibility of obtaining anorthite ceramics based on loess-like loam, which has the functional property of technical ceramics. In the CaO–Al2O3–SiO2 system, calcium-containing wastes from sugar production – defecate and lime fines – were used as a mineralize to obtain anorthite ceramics. With their participation, the possibilities of the formation of anorthite and its synthesis by the method of high-temperature synthesis have been opened. On the basis of experimental studies, it was possible to obtain a material with high mechanical strength, wear resistance and a low water absorption rate. The studies carried out show the possibility of the formation of the mineral anorthite in isothermal mixtures “loess-like loam–lime fines” and “loess-like loams–defect” at relatively low temperatures (950 – 1100 °С) than in conventional traditional mixtures, the formation of which is observed at temperatures not lower than 1200 °С
In this work we studied the influence of the laser exposure parameters and the etching solution type on the hollow channels length formed in silica glass by femtosecond laser-assisted backside wet etching. The pro-posed multi-pass method significantly increased the channel length up to 180 µm. Using the etching solu-tions, which effectively dissolve the defective layer of the formed channels, makes it possible to obtain deeper and wider hollow channels with high selectivity
Selective quality control of the produced multilayer windshields was carried out. Deviations of bent products from the specified shape are revealed. Linear regression models describing the dependence of the slack of the glasses on the temperature regime of molling are compiled. Simulation modeling of the control algorithm of the molling process shows the possibility of improving the quality of the produced multilayer glasses
A method for obtaining ceramics from igneous rocks is proposed using the example of gabbro. The possibility of using potassium liquid glass as a binding component is shown. The mineral compositions of the com-ponents formed by heating gabbro are calculated by the method of physico-chemical modeling. The optimal conditions (powder dispersion, amount of binder, etc.) of the process under consideration were determined. Samples of ceramics were obtained and their main properties were determined
An energy-saving technology for decorating varietal dishes by plasma spraying of colored varietal and container glasses has been developed. The optimal parameters of glass powder deposition are determined. The effect of high-temperature plasma torch exposure on changes in the chemical composition is investigated. The influence of the coating thickness and the preheating temperature of the product on the adhesion strength of the coating to the substrate is established
The complex study of the mineralogical and chemical composition, as well as the technological properties of clay from the “Krupeisky Sad” deposit of the Republic of Belarus, was carried out. The features of the formation of the structure and phase composition of heat-resistant ceramic materials obtained with the use of polymineral clay raw materials, in connection with the physicochemical properties and operational characteristics, were established
The introduction of 40 % calcined alkali-etched sludge into the ceramic mass of nanotechnogenic high-alumina raw materials makes it possible to obtain products with high physical, mechanical and chemical parameters at a firing temperature of 1300 °C. The use of nanotechnogenic raw materials contributes to an increase in surface energy, which is the source of the sintering process. Studies have shown that in compositions that do not contain high-alumina raw materials or calcined sludge of alkaline etching, mainly mullite is formed, which mainly forms the operational properties of ceramic products. X-ray diffractometric analysis showed that the introduction of calcined alkaline sludge into the compositions of ceramic masses contributes to the formation of corundum
A complex of physical and chemical studies was carried out: chemical analysis, X-ray phase analysis, differential thermal analysis, analysis of the microstructure of the ZCO Apatitskaya CHPP and Severodvinsk TETs-1. It was found that these materials are a promising raw material for the silicate industry, since in structure, chemical and phase composition they represent an amorphous aluminosilicate composition that does not undergo phase transformations during heat treatment. ZCO can be used in the production of temperature-cured ecogeopolymers for road construction in the conditions of the Arctic zone of the Russian Federation
The object of the study is the Ti/zeolite composite based on the raw zeolite materials from the Kulikovskoye deposit in Amur Region. The aim of the research is design of catalysts on the basis of zeolite modified by Ti nanoparticles. The composites were prepared through method of sputter deposition in a vacuum with Ti target. Structural and composition properties of obtained materials were studied. This work showed a possibility of zeolite suppoter enrichment by Ti nanoparticles
