VOL 76, No. 1 (2003)

A centrifugal mill MV, designed for grinding non-plastic materials, has been developed, passed industrial tests and implemented at a number of enterprises. Tab. 1, ill. 1, bibliography: 1 titles.

It is shown that the use of the algorithms of Fridkin and Gardon - Narayanaswami makes it possible to describe with sufficient accuracy the modes of glass hardening and gives a basis for the transition to calculations of nonlinear modes of its heat treatment, which will allow predicting new consumer properties of sheet glass. Il. 3, bibliography: 6 titles.

The synthesis of the components of the glass-forming mixture in an aqueous medium has been carried out. To control the ongoing processes, the method of pH-metry was used. Based on a comparative analysis of the pH curves, the predicted phase composition of the synthesis products was determined, which was confirmed by X-ray and IR spectral analysis methods. Tab. 2, ill. 2, bibliography: 11 titles.

The BET method was used to study the porosity in nanoporous ceramics prepared by pyrolysis at 600 ° C of an organosilicon polymer. The samples were pressed from fractionated granules obtained by single and double grinding in a planetary mill of the polymer hardened and heat-treated at 200 ° C. After an increase in the size of the granules over 250 µm at a single and 1000 µm at a double grinding, the specific surface area determined by the nanopores dropped sharply. An explanation of the results obtained is given from the standpoint of synergetics. Il. 4, bibliography: 10 titles.

The conditions for the sintering of materials of the CaO - SiO ₂ system and their influence on the properties that control the sintering process have been studied. The conditions for obtaining porous and sufficiently strong material samples with an open porosity of 45% and a compressive strength of 57 MPa, pressed at a specific pressure of 10 MPa, have been determined. Tab. 1, ill. 1, bibliography: 8 titles.

It is shown that it is undesirable to use chemically softened water for the preparation of ceramic slip, as this can cause the formation of defects during firing of products. Bibliography: 4 titles.

The possibility of using pigments based on iron and cobalt molybdophosphates for the synthesis of low-melting enamels is shown. Il. 1, bibliography: 5 titles.

The technological conditions for the production of titanium borosilicate glasses and the properties of enamel coatings, the spreadability of the enamel, and the gloss of the coating have been investigated. The effect of boron oxides and alkali metals on the physicochemical properties of titanium borosilicate enamels has been studied. A chemically resistant enamel for steel cookware has been developed that has improved properties compared to the industrial enamels used. Il. 3, bibliography: 4 titles.

The possibilities of using various types of alumina raw materials, modifying additives, temporary technological bonds for the manufacture of bioinert ceramic materials based on aluminum oxide have been investigated. The modes of heat treatment of workpieces have been developed. Received a ceramic material with an average density of 4.01 g / cm ³, tensile strength at three-point bending 380? 20 MPa, with a corundum crystal size of 4 - 6 microns and zero open porosity, which can be used as heads of hip joint endoprostheses. Tab. 4, bibliography: 3 titles.

The technology of obtaining a building finishing mineral coating based on water glass using dehydrated clay as an active component, the presence of which contributes to an increase in the volume of amorphous calcium hydrosilicates, increasing the absorptive capacity of the coating and excluding the appearance of efflorescence on the surface of painted building facades, is considered. Increased durability, strength and water resistance of the coating are provided by silicatization of sodium water glass with white Portland cement. Il. 2, bibliography: 5 titles.

The mineralogical composition, plastic and rheological properties of clays of the Troitskoye and Malo-Arkhangelskoye deposits have been studied. It was found that the clays of these deposits belong to kaolinite-illite ones with a high content of quartz and iron hydroxides. Their main characteristics are given. Tab. 4, ill. 5, bibliography: 3 titles.

A scanning photosedimentograph is described, which has a high accuracy in determining the particle size distribution of materials, increased measurement reliability and durability due to the absence of a mechanical drive and the presence of eight measuring channels. The original software has been developed, which allows to automatically determine the integral particle size distribution. Tab. 4, ill. 2, bibliography: 1 title.