The properties of industrial silica sol, such as average particle size and size distribution, are considered. The influence of separation methods (filtration and centrifugal) on the indicated characteristics of silica sol is shown.
It is shown that the experimental mass-operational characteristic of the magnetic control of feldspar ferro-impurities in semilogarithmic coordinates undergoes a "break". An option is given to obtain information about their actual mass fraction, including taking into account the remainder of ferro-impurities, which are not isolated after the completion of a finite number of control operations.
A technique for modeling the elastic electronic polarization of cubic zirconia is considered. The results of simulation of long-wave optical spectra of crystals of zirconium dioxide and yttrium oxide included in the component composition of the considered artificial mineral are presented.
Studies of the biostability of glass-foam materials have been carried out. The material is fungus resistant against Aspergillus niger molds. Molds have a negative effect on the sorption moisture content of the material, the value of which increases after biological exposure, but is within acceptable limits (no more than 2.5%). The influence of molds on structural changes in the surface layer of the material is confirmed by IR spectroscopy data. The leading role in microdamage of the interpore septum is played by the particle size of the crystalline phase, rather than its amount.
The properties of basalt fiber obtained using low-temperature plasma have been investigated. Basalt wool has good physical and mechanical properties. Its chemical stability depends on the composition of the feedstock. Mineral wool obtained from the basalt of the Vasilievskoye deposit can be used to insulate surfaces with temperatures up to 500 ° C, from the basalt of the Suduntui deposit - up to 700 ° C.
The rheological properties and aggregate stability of molding solutions for the production of aluminosilicate fibrous materials are considered. The effect of acetate groups in polyvinyl alcohol on the properties of molding solutions is shown.
The microhardness of quartz ceramic was measured at three stages of heat treatment of the primary billet obtained by slip casting: after drying at 100 ° C; after sintering at 1190 ° C; after flaming surface treatment. Although the hardness of the final product is close to the known values ??for silica glass, the IR spectroscopy data indicate the presence of significant internal stresses in the material. The found high content of terminal atomic groups in the primary material is a favorable factor for the doping of Kersyl.
The structure of aluminum hydroxide powders obtained as a by-product in the production of hydrogen fuel has been investigated. One of the main starting components was aluminum-magnesium shavings with a mass content of 0.6, 6 and 12% magnesium. The phase composition and morphology of powder particles were investigated using X-ray phase and petrographic methods of analysis. It was found that the obtained aluminum hydroxide powder is a promising material for the production of corundum ceramics.
On the example of glasses of the R 2 O - Ga 2 O 3 - SiO 2 - GeO 2 (R = Li, Na), activated by Ni 2+ , the mechanism of the emergence of broadband luminescence in the near-IR region of the spectrum during their nanostructuring at the initial stages of phase separation is described.
