The disadvantages of existing methods for determining the thermal resistance of materials are noted. On the basis of information on the change in the strength of samples of various compositions during thermal cycling, an easy and more objective method for determining thermal stability is proposed. The conditions of testing are substantiated. Tab. 1, ill. 2, bibliography: 8 titles.
The physicochemical and technological properties of the Gzhel deposit clays have been studied. They can be recommended as the main type of raw material for the production of pottery and majolica products, ceramic tiles, tiles, artistic ceramics, tiles, etc. Table. 2, ill. 1, bibliography: 1 titles.
The effect of laser radiation with different pulse duration and pump voltage on ceramic materials is investigated. Amorphization of the structure of the ceramics in the zone of the laser beam was established. The processing of materials with laser beams leads to the formation of radial microcracks with a size of 40 - 50 microns. Tab. 3, ill. 5, bibliography: 13 titles.
The literature on the synthesis and research of various crystalline glazes is summarized. Typical types and compositions of glazes, as well as their structural features, firing mode and areas of application are given. The influence of the phase composition on the decorative properties of crystalline glazes is shown. Tab. 1, bibliography: 19 titles.
The influence of the heating rate on the density, water absorption and Young's modulus of ceramic materials based on clays of various mineralogical compositions has been investigated. It was found that the optimal heating rate depends on the mineralogical composition and functional parameters of the ceramics. Tab. 3, bibliography: 4 titles.
The application in the production of high-voltage insulators of enriched kaolin of the "Zhuravliny Log" deposit instead of Prosyanovsky kaolin has been investigated. The resulting products have higher mechanical and electrical performance. Tab. 4, ill. 3, bibliography: 2 titles.
The possibility of obtaining by low-temperature proton-carbon treatment of wurtzite-like boron nitride with a microcomposite structure in the form of nanotube packages has been studied. It is shown that the formation of nanotube stacks far from the processing zone is associated with collective shear deformations of layers from self-organizing blocks. Tab. 2, ill. 3, bibliography: 5 titles.
The influence of montmorillonite on the sintering of kaolin and kaolinite-montmorillonite clay materials of East Kazakhstan has been investigated. It was found that the optimal amount of introduced montmorillonite (30%) promotes the intensification of the sintering of clay materials. Tab. 3, ill. 2, bibliography: 4 titles.
A method is proposed for the quantitative assessment of the composition of dispersed systems or structures by the volumetric concentration of the constituent phases in the implementation of any technological operation in the production of silicate and ceramic materials. The possibility of using a triple phase diagram and criteria for the formation of a structure - the volumetric concentration of a solid phase and a structural-energy parameter - for monitoring and controlling the formation of structures at all main stages of the technological process is shown. Tab. 3, ill. 2, bibliography: 10 titles.
Using 50 dense and porous corundum materials with sintering additives as an example, the dependence of the material strength on the strength of interparticle contacts P, interlayer thickness h, particle size d, and the amount of additives is analyzed. A linear dependence of Р on d for porous materials and a quadratic dependence of Р on d 2 for dense materials is established. The dependence of h on d is linear in all cases. It is shown that the P index is more sensitive to the structural characteristics of the material than its strength. Tab. 2, ill. 1, bibliography: 17 titles.
