The problem of reproducibility is discussed from a fairly general point of view of the applied theory of dynamical systems. A number of basic concepts of the theory of nonlinear oscillations (bifurcations, fractal sets, spatio-temporal networks of interacting subsystems), which may be useful in applications, are described at the qualitative level. Bibliography: 17 titles.
Porous ceramics were obtained from strontium zirconate synthesized from zirconium dioxide TsRO-2 and baddeleyite powder PB-1 and strontium carbonate using a burnout additive - bead polystyrene. The possibility of making porous zirconate ceramics in a one-stage synthesis process - sintering is shown. The material is intended for the lining of a high-temperature electric furnace. Il. 6, bibliography: 4 titles.
Simple technologies have been developed for the manufacture of cheap ceramic fibers suitable for metal reinforcement and the manufacture of highly porous ceramic parts of a fibrous structure intended for reinforcing the piston crown of an internal combustion engine. Il. 2, bibliography: 4 titles.
The possibility of obtaining durable porous ceramics based on aluminum oxide using a mixture of silicon carbide with an activating additive as a binder and ammonium bicarbonate as a pore-forming agent is shown. The effect of the amount of added additives and the firing temperature on the porosity and strength of the material has been studied. Tab. 3, ill. 1, bibliography: 3 titles.
It is shown that, to intensify the sintering of chamotte-kaolin masses, refractory easily sintered plastic clays should be replaced with refractory clay. Recommendations are given on the choice of the method of preparation and introduction into the mass of the specified additive. The developed technology has been tested in pilot industrial conditions. Il. 3, bibliography: 3 titles.
It is shown that the connectivity and plastic strength of wet materials, their thermophysical and drying properties are predetermined by the ratio of the capillary-mobile and capillary-immobile forms of moisture and the natural properties of materials, the complex of which should be evaluated by the lowest capillary or maximum molecular moisture capacity, which are the most important water-physical characteristics of materials. ... Formulas are proposed for calculating the dependence of the connectivity and plastic strength of materials on moisture content, their sensitivity to drying, as well as formulas for calculating the thermophysical properties of wet materials. Il. 5, bibliography: 10 titles.
A technology has been developed for glazing wall ceramics by preliminary flashing of dried unfired products with a plasma torch with their subsequent firing. Tab. 1, bibliography: 9 titles.
A comprehensive physicochemical study of hydroxylapatite obtained by the wet method was carried out. The possibility of using the material both in bioceramics and in catalytic and sorption processes as a catalyst and sorbent is shown. Tab. 1, ill. 2, bibliography: 3 titles.
The sol-gel method was used to obtain composite ceramic materials based on a siloxane binder and fine powders of refractory fillers (based on various borides, nitrides and carbides), which do not require prolonged sintering at high temperatures. It was found that the best filler is AlN - after heat treatment at 900 ° C, the material based on it has increased hardness, strength, and heat resistance. Tab. 1, bibliography: 6 titles.
The results of studies of clay minerals of the Malo-Budishchanskiy deposit (Poltava region) used for the production of facing bricks are presented. It is shown that the introduction of kaolinite-hydromica clays into the composition of the ceramic mass makes it possible to improve the technological and physical-mechanical properties of the mass, as well as to increase the strength of finished products. Tab. 4.
