VOL 80, No. 12 (2007)

The influence of the technology parameters on the properties of 2- and 42-day film-forming solutions of the CuO - TiO ₂ system is analyzed. It was revealed that the initial components have a significant effect on the processes of maturation of POR and the properties of coatings. The properties of coatings obtained from solutions of different ages are associated with changes in their microstructure. The refractive index and thickness of the films from 42-day POR are largely independent of the firing mode, and the reflection coefficient and chemical resistance vary ambiguously. Tab. 3, ill. 1, bibliography: 4 titles.

A new paste for glass surface matting is proposed, which acts on the basis of the physicochemical process of surface ion exchange and does not contain hydrofluoric acid and its derivatives. The frosting process takes place at a temperature of 300 ° C and differs significantly from the known frosting processes: chemical etching and sandblasting of glass. The studied morphology of the surface layer of frosted glass is characterized by a system of microblocks (linear dimensions 50 - 150 ?m) and microcracks (width 100 - 200 nm). Microblocks have smooth borders and a smooth front surface. The morphology of the glass surface after matting and subsequent metal deposition by chemical reduction is also presented. Il. 5, bibliography: 4 titles.

The results of an X-ray study of iron aluminate with a unit cell parameter a = 8.090 (4) & Aring; and cation-defective iron aluminate Fe _0.5 Al _2.33 O ₄ with a = 8.002 & Aring; as well as a new modification of aluminum oxide synthesized by impact of explosives containing aluminum. Aluminum oxide can crystallize in a hexagonal system in a primitive lattice with a = 9.151 (1) & Aring ;, c = 7.945 (2) & Aring ;, V = 576 & Aring; ³ or in tetragonal in a primitive lattice with twice smaller volume - a = 7.941 (2) & Aring ;, c = 4.575 (1) & Aring ;, V = 288 & Aring; ³. Tab. 5, ill. 3, bibliography: 30 titles.

The results of studies to determine the possibility of using local raw materials of Uzbekistan for the production of electrical ceramics are presented. The properties of ceramics are studied depending on the chemical composition of pegmatites of various deposits. It was determined that the electrical characteristics primarily depend on the content of oxides of alkaline elements in porcelain and, to a lesser extent, on the K ₂ O: Na ₂ O ratio in silica-containing raw materials. Tab. 3, bibliography: 3 titles.

Based on the results of calculations of the enthalpy of formation of beryllium oxide doped with titanium, obtained using quantum-chemical calculations within the framework of the DFT theory, the limit of solubility of titanium in BeO was estimated. Using the example of titanium-doped beryllium oxide, a technique for the numerical estimation of the limit of solubility of impurities in crystals is considered, based on the use of the results of ab initio quantum-chemical calculations. The technique can be used to assess the solubility limit of various impurities in inorganic compounds and ceramic materials based on them. Il. 1, bibliography: 7 titles.

The results of the marketing research of the Russian market for the production of glass containers are presented. 2000 to 2006 the real market capacity increased by 268%. The largest growth dynamics is shown by the bottle segment - its capacity increased by 294%. Il. 3.

The current level of knowledge about biomaterials and bioceramics based on calcium orthophosphates is shown. These chemical compounds are of particular importance, since it is from them that the inorganic constituent of both normal and pathological hard tissues of humans and mammals consists. Due to their great chemical similarity with mammalian solid tissues, many calcium orthophosphates have exceptional biocompatibility and bioactivity. These material properties are actively used in the development of artificial bone implants. Tab. 2, ill. 1, bibliography: 22 titles.