The properties of three samples of low-melting clays (Tyumen region) were investigated for use in the production of ceramic building bricks. Found that clay samples? 1 and 3 can be used for the production of clay facing frost-resistant bricks of grade 150 by plastic molding. Sample clay? 2 can be used for the production of facing clay frost-resistant bricks with the introduction of additives that improve the drying properties
An energy-efficient method for creating composite materials based on SiC modified with oxide eutectic compositions with high mechanical characteristics has been proposed. The effect of varying the particle size distribution on the physical and mechanical properties of ceramics has been investigated. The ratio of fractions was determined, a dense material with high strength and crack resistance was obtained. The developed ceramics is promising as a structural one, including as armor protection.
A composite based on polycrystalline cubic boron nitride with a refractory binder, characterized by a high degree of phase distribution homogeneity, was obtained by thermobaric treatment in a cubic press at a pressure of 6.0 GPa and a temperature of 1450 ° C. The homogeneity of the microstructure of the large-sized composite was confirmed by XRD, SEM, and XMA. Mechanical tests, impact turning tests of hardened steel, proved the high strength of the composite. Thus, composites made using this technology can be recommended for use in the mining industry.
On the basis of model and experimental studies, the formation of the structure of a porous highly refractory ceramic material with a granular structure has been studied. The concept of the structure of the ceramic material of rods as a material consisting of interpenetrating bulk clusters of oxide grains of various sizes cemented with a ceramic bond has been developed. Using the main provisions of the percolation theory, a study of a model structure with cubic packing was carried out and a correlation was established between the structure-sensitive shrinkage phenomena of the ceramic material of the rods and the fraction of nodes belonging to the skeleton of an infinite cluster
Samples of catalytic ceramic membranes based on the CeO 2 ? ZrO 2 system by the sol-gel method have been synthesized. The morphology, phase composition and porous structure of membranes were investigated.
Zn 2 TiO 4 - ZnO ceramic samples were obtained using zinc and titanium oxide nanopowders. Phase formation, as well as the microstructure and elemental composition of the phases being formed, have been studied by electron microscopy. The density and porosity were calculated, and the sizes of the grains and pores of the ceramics were estimated. The temperature at which zinc titanate is formed has been determined. It is shown that it corresponds to the sintering temperature of electrocontact materials of the given composition. Titanate and zinc oxide are supposed to be used as an arc extinguishing and dispersion-strengthening additive in copper-based electrical contact materials.
With the development of non-ferrous metallurgy, the requirements for the quality of the produced metals and products from them are increasing. During the production of aluminum, it is necessary to remove impurities present in the melt. A brief overview of the types of impurities in the aluminum melt and methods of their removal by means of melt filtration is given. Existing ceramic filters and methods of their manufacture are considered.
Sintering of advanced materials. Fundamentals and processes / еd. by ZZ Fang. Cambridge: Woodhead Publishing Limited, 2010.483 p.
Belyakov A.V. Synergetic and quasi-chemical approaches in ceramics technology // Glass and ceramics. 2003.? 9, p. 21? 27.
Belyakov AV Synergetic and Quasichemical Approaches in Ceramic Technology (A Review) // Glass and Ceram. 2003. V. 60. N 9? 10.P. 274? 279.
Belyakov A. V., Bakunov V. S. Evolution of structure in the process of ceramics technology // New refractories. 2006.? 2.S. 55? 62.
Toropov N. A., Barzakovsky V. P., Lapin V. V. et al. State diagrams of silicate systems: a reference book. Issue 3. Triple silicate systems. L .: Nauka, 1972.448 p.
Balkevich V.L. Technical ceramics. Moscow: Stroyizdat, 1984.256 p.
Bakunov V.S., Vu Ngok Kyong, Agafonova M.I. et al. Research of the properties of synthetic mullite ceramics depending on purity // Ogneupory. 1974.? 4.S. 32? 38.
A.S. 1078824. Method of obtaining spodumene ceramics / E. V. Bendovskaya, I. Ya. Guzman, A. V. Belyakov // Bul. 2006.? 4.
AS 1071607. Method of obtaining mullite ceramics / V. L. Balkevich, A. V. Belyakov, E. R. Men'kova // Bul. 1983.? 5.
Toropov NA, Barzakovsky VP, Lapin VV, Kurtseva NN State diagrams of silicate systems: a reference book. Issue 1. Binary systems. L .: Nauka, 1969.882 p.
A.S. ? 1121914. A method for producing dense ceramics based on lanthanum or yttrium chromites / A. V. Satanovsky, V. L. Balkevich, A. V. Belyakov // Bul. 2006.? 4.
Smigelscas AD, Kirkendall ED Zn Diffusion in-brass // Trans. AIME. 1946. V. 13. N 7. P. 2171? 2173.
Pines P. Ya., Sirenko AF Self-diffusion and heterodiffusion in inhomogeneous porous bodies. Direct and inverse Frenkel effect // ZhTF. 1958. Vol. 8. S. 1748? 1952.
Belyakov AV Influence of differences in the diffusion coefficients of cations on the deviation from stoichiometry in complex oxides // Glass and ceramics. 1997.? 10, p. 18? 20.
Belyakov AV The Effect of a Difference in the Diffusivity of Cations on the Deviation from Stoichiometry in Complex Oxides // Glass and Ceram. 1997. V. 54. N 9? 10.P. 317? 319.
Bakunov VS, Belyakov AV, Dzhigailo NT, Popil'skiy R. Ya. On the possibility of obtaining dense ceramics from zirconates of alkaline earth metals by combining synthesis and sintering // Tr. MHTI them. D.I. Mendeleev. 1983. Issue. 128.S. 67? 71.
Handbook of sol-gel science and technology // Proc. Characterization and Applicattions / ed by S. Sakka. New-York, Boston, Dordrecht, London, Moskow: Kluwer academic publishers, 2004.791 p.
Maksimov A.I., Moshnikov V.A., Tairov Yu.M., Shilova O.A. Fundamentals of the sol-gel technology of nanocomposites / Technomedia Ltd. Saint Petersburg: Elmore, 2007.255 p.
A study of aluminosilicate rocks used for facade ceramics is presented. The possibility of efficient use of oil shale, the reserves of which are significant in South Kazakhstan, is shown. The use of shale and refractory clay will make it possible to obtain clinker products with a water absorption of less than 7%. Such raw materials have not previously been used in the production of facial ceramics.
Aspects of the technology of creating tubular substrates based on corundum for membranes are considered. The ratio of the components and the rheological properties of the slip have been determined. Experiments on the deposition of a selective layer on the substrate have been carried out.
The developed composition and manufacturing technology of the workpiece make it possible to create substrates with an open channel porosity of about 42%, a pore size of no more than 1 ?m, and a flexural strength of 20 MPa.
