VOL 89, No. 2 (2016)

The effect of small additions of zirconium concentrate with an average particle size of 30 nm on the physical and mechanical properties of foam glass is considered. It was found that the introduction of zirconium dioxide into the foaming mixture leads to a change in the macrostructure of the foam glass and an increase in the average pore size to 2.5 mm. Nano-sized ZrO ₂ reduces the melt viscosity during foaming. Optimal from the point of view of mechanical properties is the mass content of zirconium dioxide 0.3%. The strength of the foam glass increases in the presence of nanosized particles up to 1.4 MPa in comparison with the strength of the original foam glass of 1.1 MPa. A further increase in the mass content of zirconium dioxide to 1.1% reduces the strength to 0.5 MPa

Porous metal-ceramic membranes with improved operational properties have been synthesized by the SHS method with a reduction stage in the thermal explosion mode in vacuum from a mixture of PTYu alloy powders (95% Ni ? 5% Al) + Co3O4. As a result, porous cermet membranes were obtained containing 10 ? Ni and Co nanoparticles in the surface pore layers. 20 nm. A prototype prototype of a power plant with high mass and size characteristics of a battery of cells has been developed: specific volume 3.3 l / kW and 1.6 kg / kW

The structure and thermophysical properties of materials formed in the Dy ₂ O ₃ -HfO ₂ system (molar ratio from 1: 3 to 3: 1 ) as a result of isothermal roasting of X-ray amorphous mixed hydroxides at temperatures up to 1600 C. It has been shown that, at a ratio of 1: 3 to 1: 1, the crystallization process leads to the formation of single-phase solid solutions having the structure of defective fluorite with a pronounced nonequivalence of the parameters of the local environment of Dy and Hf. It was found that ceramics based on dysprosium hafnate (Dy ₂ O ₃: HfO ₂ = 1: 1) has a low thermal conductivity ~ 1.4 W / (m • K), practically independent of temperature (up to 800 С)

The effect of culture liquids with bacteria Acinetobacter johnsonii str. J221 and Pseudomonas aeruginosa str. Gd on the rheological properties of a porcelain slip. The surface activity of the culture liquid provides a decrease in the fluidity and thixotropic hardening of the porcelain slip. The increase in the mass of the casting during casting is due to the hydrophobization of the surface of the slip particles. The thickening of the porcelain slip is interconnected with the change in the redox state of the medium from weak to strongly reduced, favorable for the development of the aboriginal community of anaerobic microorganisms

Considered is the production of a non-waste technology from simple and readily available substances and the use of an environmentally safe glassy metaphosphate composition (SFC) of patented compositions for the complex protection of elements of water heating systems from corrosion and salt deposition (scale). The results of experiments on the study of solubility, anti-corrosion and antiscale properties of SFC are presented.

The results of research on the use of sludge formed during the purification of drinking water (WSP), which contains about 68 Fe ₂ O ₃, as an additive in the production of effective ceramic products. In the manufacture of effective ceramic products, an additive SHOPV was introduced into the charge in an amount of 40 60, the firing temperature of ceramic products was 900, 1000, and 1050 C. Studies have shown that the addition of SHOPV has the following effect on the properties of ceramic specimens: it reduces density, compressive strength, thermal conductivity, and increases porosity. SHOPV is a natural pigment that colors ceramics in a darker red color.

Compositions, technological parameters of ceramic products for internal lining, obtained using phosphonic slag, refractory and bentonite clays, are given. The chemical and mineralogical composition of clays, phosphorus slag has been investigated, and the technological parameters of production and the physical and mechanical properties of ceramic tiles have been determined.

Domestic commercially available powders? -Al ₂ O ₃ are considered and evaluated for use as raw materials for the production of high-strength ceramics. Additional chemical cleaning and mechanical treatment of alumina GDT can improve the ceramic properties of the material. Ceramics obtained from fine-crystalline alumina produced by ZAO Nano-composite, in terms of density and microhardness, surpasses all the materials considered, including ceramics obtained from Almatis-1200 alumina.