RESEARCH LABORATORY OF CERAMICS

         

Main directions of research works of the laboratory:

• improvement of properties of existing ceramic materials and development of new ceramic materials of a functional purpose on the base of oxides, including soft magnetic ferrites;
• development of new technologies and equipment, commissioning of a new technological equipment and pilot divisions, output on their base of developed ceramic materials and products.

          Ceramic materials on the base of aluminum oxide, being alloyed by complex high melting oxides, as well as zirconium dioxide, being strengthen due to polymorphous transformations, are produced in the laboratory. These materials have a uniform fine crystalline structure; high density, strength, hardness, viscosity of failure; an abrasive, chemical and thermal resistance; good thermal, electrical and physical properties. The use of special modes of a thermal treatment and different additives provides a high level of consolidation and absence of a significant crystallization.

         Developed structural, tool, electric grade, thermal insulating ceramics are successfully used in conditions of high loadings during the friction, water and air erosion; of increased temperatures and pressures, in conditions of a thermal circling and a thermal shock, an active chemical and thermal effect. Oxide ceramics are produced to use in mechanical and instrument engineering, chemical, textile, electric technical industries; in valves as nozzles, dies, thermal and electrical insulating accessories; targets for coating spraying; bodies, substrates, inserts, pads and etc.

          Investigations of nanostructural ceramics, being obtained by traditional and high-energy methods of loading, are carrying out in the laboratory. It is expected that due to a high level of homogeneity and a big number of intergranular contacts in this kind of ceramics it is possible to create a new class of high melting and wear resistant materials with physical and mechanical and functional properties surpassing the propeties of known materials in 1,5-2,0 times, as well as magnetic and insulating materials for electronics and electrical engineering with increased electro physical parameters 1,3-1,8 times.

Developed are soft magnetic ferrites with a round hysteresis loop on the base of nickel-zinc and manganese-zinc materials with a strictly determined complex of electromagnetic properties to use as cores of inductive elements of radio and electronic equipment operating in weak and strong magnetic fields in the range of frequencies up to 30 MHz. In the laboratory there is a pilot and industrial division where technolo-gies of production of oxide ceramics and soft magnetic ferrites by methods of semidry static compaction, con-tinuous extrusion of plasticized mass, hot die casting of thermal plastic mass and thermal treatment on air at the temperatures up to 1600 ^oC.

         Soft magnetic ferrites are produced as cores of different configurations to use in radio electronics, automatics, television, communication facilities, in instrument engineering as magnetic circuit, coilsof constant and variable inductance, magnetic aerials, valves of inductance changes and tuned-circuit Q-factor. Developed are compositions and technologies of production of ceramic nanocomposites, as well as technologies of manufacturing of products thereof.

         Production of blade and abrasive tools from composites containing diamond grains enables to use tools for treatment of metallic (steel 3, steel SH15, pig iron etc.) and non-metallic (ceramics, glass, natural stone, building materials, composites on a polymer base) materials, to increase the wear of tools and to reduce temperatures in a cutting zone.

         Nanocomposites are used for production of parts of electronic equipment of a high strength and with required electrical and physical properties. Nanocomposites are obtained by powder metallurgy methods and by new nanotechnologies and zol-gel synthesis.

         Developed are technologies that are easily realized on the universal equipment and that enables to produce different metalo- ceramic laminated and powder materials containing thin layers or dispersive inclusions on the base of SiO₂, ZrO₂,Y₂O₃, TiO₂ with geometrical parameters 6-100 nm.