October 2015, № 10 (185)

Kanygina O.N., Anisina I.N. NATURAL CLAY FROM ORENBURZHYE AS A RAW MATERIAL FOR FONCTIONAL CERAMICSFor 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.Key words: ceramic, clay, charge composition, shrinkage, loss of weight and density.

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About this article

Authors: Kanygina O.N., Anisina I.N.

Year: 2015

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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