Kanygina O.N., Anisina I.N.
NATURAL CLAY FROM ORENBURZHYE AS A RAW MATERIAL FOR FONCTIONAL CERAMICS ^{[№ 10 ' 2015]}
For new ceramic materials with desired properties requires careful assessment of the state of natural resources and prospects of the development of new ceramic materials with the use of mineral resources, in particular, the Orenburg region. Installed promising natural montmorillonite and kaolinite-containing clay as a raw material for functional materials. It is shown that the optimization of the composition of the ceramic mass allows to develop ways of shaping and firing modes, determines the kinetics of drying, roasting, and the formation of structures with a wide range of characteristics. Technological properties of ceramic materials and 4 species, drawn from natural unenriched containing montmorillonite and kaolinite clay, identified by primary macroparameters sintering processes: volumetric shrinkage and weight loss during sintering, the density of the resulting ceramic. The maximum value of mass loss (12 %) are observed for the blend, which contained 60 % montmorillonite and containing 40% kaolin clay, fired at 950 °C (2h) with intermediate hours at 500 °C and 700 °C. Optimal shrinkage values (about 11–13 %) of the samples obtained during the firing of 950 and 1 100 °C are indicative of a satisfactory rate of sintering and observed for the blend of the same composition. Changing the montmorillonite clay content in the range 40–60 % has no effect on shrinkage at high temperature firing. Increasing the firing temperature generally leads to higher density, except for batch containing 80 % montmorillonite clay, glass phase which starts to boil and form large clusters pore occupying the volume of the sample to 0.5.

Anisina I.N.
FUNCTIONAL CERAMICS BASED ON MONTMORILLONITE CONTAINING CLAY ^{[№ 1 ' 2015]}
One of the problems of modern materials science is the establishment of effective resource and energy saving technologies for production of ceramic materials with desired properties. Promising development of new technologies and, above all, the optimization of heat treatment processes and disperse composition of ceramic masses in order to obtain the desired properties, using natural cheap and available raw materials. In this regard, more and more attention is paid to new materials and clays systems on their basis. By chemical, particulate, XRD, XRF analysis, optical microscopy identified particulate and phase compositions of the starting ceramic material and samples of the composite ceramic material (CCM) on the basis of natural montmorillonite containing (MС), one of the clay deposits of the Orenburg region. Refers to a group of clay fusible clay material with predominance of two fractions with effective average particle diameters of 400 and 130 microns. For fine fraction interval sintering degenerates into a point — 950 ?C; reinforcement particles of SiC (20 wt.%) it extends from 950 to 1000 ?C increases the strength of the CCM and from 5 to 50 MPa followed by sintering at 1000 ?C (2h) with an intermediate heating at 700 ? C (1h). MC clay particles 400 microns ceramic reinforcement particles mass SiC (20 wt.%) and increasing the coefficient of heat diffusivity of 30%, whereby a compressive strength of 50 MPa is provided by a structure formed after annealing at 950 ?C (2h) with intermediate holding at 700 ?C (1h). The acidity of the mixing water (pH2) allowed to exclude the formation of cracks in the sample volume, reduce the speed of phase transformations during sintering. Maximum strength of CCM MC clay — 20% pH2 — 20% SiC due to the content of 40-50% sillimanite, the amount of which is determined by the dispersion of clay particles and the synthesis conditions.

Kanygina O.N., Anisina I.N., Davletbakov R.R.
BRITTLE FAILURE OF THE CERAMIC MATERIAL, REINFORCED WITH SIC-PARTICLES ^{[№ 9 ' 2014]}
The parameters of the brittle failure ceramic material reinforced with silicon carbide particles is investigated. It is established that the maximum strength and minimum rate of crack propagation is achieved by variation of the internal parameters and firing optimization.

Kanygina O.N., Anisina I.N., Chetverikova A.G., Salnikova E.V.
MONTMORILLONITE CONTAINING CLAY FROM ORENBURG REGION AS THE RAW MATERIAL FOR FUNCTIONAL CERAMICS ^{[№ 10 ' 2013]}
The availability of nature montmorillonite containing clay as the raw material for functional ceramics is determined. It is demonstrated that the choice of disperse composition of clay set of drying and sintering kinetics, the evolution of structure with wide spectrum of characteristics.

Anisina I.N., Chetverikova A.G., Kanygina O.N.
ACTIVATION ASPECTS OF SILICEOUS CERAMICS SYNTHESIS FROM MONTMORILLONITE CONTAINING CLAY ^{[№ 4 ' 2012]}
Results of the analysis of activation ways of montmorillonite containing clay sintering are presented in the work. Possibilities of process activation of sintering at the expense of initial clay raw materials enrichment at batch mixture reception are considered. The factors characterizing degree of activation of ceramics synthesis from montmorillonite containing clay are resulted.

Kanygina O. N, Kravtzova O.S., Anisina I.N., Chetvertikova A.G., Salnikova E.V., Dostova T.M.,Tkachenko A.A.
DISPERSIVE ANALYSIS MONTMORILLONITE-BEARING OF CLAY OF ORENBURZHYE ^{[№ 12 ' 2011]}
The dispersive analysis montmorillonite-bearing clay of Orenburzhye, based on screen fractionation, sedimentation and optical microscopy is carried out. It is established that division of investigated clay on two fractions is expedient. From low-dispersed fractions by optimization of modes of synthesis probably reception of microporous ceramics of high density and durability.