V. M. Pogrebenkov

Ceramic Pigments Based on Natural Minerals

The results of studying the use of nontraditional materials in the production of ceramic pigments are summarized. It is noted that the use of natural materials, namely, calcium-magnesium silicates, opens vast opportunities, since they can act as main or transitional crystalline structures. New methods of synthesis of pigments are discussed.

Ceramic pigments based on calcium-magnesium silicates

The possibility of preparing ceramic pigments on the basis of natural silicates is investigated. It is shown that tremolite and diopside rock can be used for obtaining ceramic pigments with the structure of diopside. Wollastonite gives a wollastonite structure which can be the base for preparing diopside and anorthite using additives.

Obtaining high thermally conductive materials by pressing from the granulate

This work contains results of investigation of obtaining high thermally conductive ceramics from commercial powders of aluminum nitride and yttrium oxide by the method of monoaxial compaction of granulate. The principal scheme of preparation is proposed and technological properties of granulate are defined. Compaction conditions for simple items to use as heat removal in microelectronics and power electrical engineering have been established. Investigations of thermophysical properties of obtained ceramics and its structure by the XRD and SEM methods have been carried out. Ceramics with thermal conductivity from 172 to 174 W/m·K has been obtained as result of this work.

Talc-based ceramic pigments

The results of a study of synthesis of ceramic pigments from talc are presented. The possibility is demonstrated for pigments to be made with the crystal structure of magnesium metasilicate and forsterite.

Production of ceramic pigments with diopside structure from TALC

The results of investigation of synthesis of ceramic pigments with diopside structure are presented. Two reactions of diopside production are considered. It is indicated that the use of natural talc mineral makes it possible to lower the expense of pigment production and expand the pigment color range.

Zeolites: Raw material for ceramic pigments

The possibilities of using natural zeolite for synthesizing ceramic pigments are investigated. The special features of isomorphism of bi- and trivalent cations in the zeolite lattice are analyzed. It is shown that it is possible to obtain pigments with the structure of anorthite and mullite using a zeolite structure with additives (alumina, wollastonite).

Use of Siberian mineral raw materials in the manufacture of self-glazing ceramic tile

It is shown to be possible to manufacture self-glazing ceramic tile of satisfactory quality from the mineral raw materials available in the Siberian region and the soda—alkali effluent from a local petrochemical plant.

Argillaceous Materials in the Siberian Region

The results of integrated studies of argillaceous materials of the Siberian Region are considered and recommendations are issued for evaluation of the quality of materials, which make it possible to identify the means of control of the main technological properties of argillaceous rocks with the aim of bringing then to the required level.

Ceramic pigments with diopside and anorthite structures based on wollastonite

Ceramic pigments with the structures of diopside and anorthite are obtained from natural wollastonite. It is demonstrated that the reactions of synthesis of diopside structure occur in several stages with formation of intermediate products. Mineralizing additives are required for a more complete phase formation of the anorthite structure. The obtained pigments have a vivid color and can be used to decorate porcelain, faience, and majolica products.

Mullite-Corundum Materials Based on Mullite Binder Resistant to High-Temperature Deformation

Results are provided for development of mullite-corundum materials based on refractory filler (mullite or corundum) and a high-alumina ceramic binder (acicular mullite and fine-grained corundum). A model is presented and implemented for a structure of fragmentary type of mullite-corundum material providing good refractory qualities.