It has been established that the evolution of the structure of the solid phase of the material and the porous structure proceeds mainly in different directions: if, with a decrease in porosity, the coordination number in the solid phase of the material increases, then in the porous structure it decreases. A universal fairly rigorous model of the structure of highly porous and low-porous ceramic materials obtained by pressing and using powdered burnable monodisperse additives is proposed.
Nanoporous ceramics with a pore volume of about 60% were obtained by isostatic pressing from Al 2 O 3 nanopowder. The study of the microstructure, porosity and strength of the obtained ceramics has been carried out. The technological conditions for the production of nanoporous ceramics, which provide an optimal combination of strength and porosity, have been determined.
Basalt and granitoid rocks have been investigated as components of raw materials for producing ceramic tiles for interior wall cladding. The combined introduction of granitoids and basalts contributes to an increase in the mechanical strength of the tiles in bending while maintaining the set of required physical and chemical properties and improving the quality of sintering.
An information-analytical study of the technology of metallization of ceramics from aluminum nitride has been carried out. At domestic and foreign enterprises, work is widely carried out on the development of thin-film and thick-film technology for metallization of ceramics from AlN. Various electronic products have been created using metallized AlN products.
An overview of works on biological effects on clay materials and ceramic masses is presented. The main directions and differences in the technology of biological treatment are determined depending on the type of microorganisms, the method of obtaining and the composition of the culture liquid, the conditions and method of biological treatment, the material composition and natural cenosis of clay materials. The role of individual components of the culture fluid in changing biological and biochemical processes is shown. The experience of using bioprocessing in the ceramic industry is considered.
A comparative analysis of the features of the microstructure and mechanical properties of composite ceramic materials obtained from a nanosized powder of the composition Ce 0.1 Al 0.1 Zr 0.8 O 2 < / sub> synthesized in three ways: in the presence of urea, in the presence of hexamethylenetetramine, using an aqueous solution of ammonia as the main agent. It was found that both the Ce 0.1 Al 0.1 Zr 0.8 O 2 powder, synthesized in the presence of hexamethylenetetramine, and made of this ceramic powder, has the best characteristics.
The technique of modeling elastic electronic polarization of the representative of cordierite ceramics L-24 is considered. The results of simulation of the frequency dielectric spectra of oxide crystals of corundum and quartz, which are part of the L-24 ceramics, and the simulation of an industrial sample of this ceramics are presented.
The roughness of the surface of the filaments made of aluminum oxide has been determined. The roughness of the thread-conducting parts of textile machines in the textile processing of aluminum oxide threads has been substantiated. The height of the profile irregularities by ten points, the standard deviation of the profile and the average value of the surface roughness parameter are determined.
The factors influencing the process of obtaining transparent ceramic materials are analyzed. Methods for obtaining materials based on yttrium oxide and yttrium-aluminum garnet, transparent in the visible region of the spectrum, are shown. The modes of heat treatment of materials were established both in air and in vacuum. Mechanisms have been developed for creating a composite transparent material that combines the properties of its constituent oxides. The material obtained has high thermal resistance, thermal conductivity and light transmission in the visible region of the spectrum.
