Research of Structure and Phase Composition of Clays in the Course of their Heat Treatment

The necessity of developing a theory allowing to control the processes of structure formation and color formation of building ceramics products were indicated. A complex study of a number of clays was carried out using the most modern research methods: nuclear gamma resonance (Mssbauer) spectroscopy, high-temperature phase analysis, synchronous thermal analysis and spectrophotometry. The use of these methods made it possible to understand the processes that occur throughout the temperature range during the annealing of clay. Based on the conducted studies, the characteristic behavior of kaolin clays during roasting and the influence of hematite on the color of ceramic products have been established. The reflection spectra of ceramic materials of various manufacturers was compared. Examples of the expediency of using the CIELab model for qualitative assessment of color were given. It was shown how the application of modern research methods allows solving the problems arising in brick factories.

A.M. SALAKHOV¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
R.R. KABIROV², Engineer, General director;
V.P. MOROZOV ³, Doctor Sciences (Geology and Mineralogy);
R.A. ARISKINA¹ , Engineer;
A.R. VALIMUKHAMETOVA¹, Magistrand,
K.A. ARISKINA¹, Engineer

¹ Kazan Federal University. Institute of Physics (16a, Kremlyovskaya Street, Kazan, 420008, Russian Federation) 
² “Alekseevskaya ceramics” ОАО (10, Kirpichnezavodskaya Street, Urban-type settlement Alekseevseo, 422900, Republic of Tatarstan) 
³ Kazan Federal University. Institute of Geology and Petroleum Technologies (4/5, Kremlyovskaya Street, Kazan, 420008, Russian Federation)

1. Reznik V.I. Possibilities of production of facing and clin ker brick of light colors on the basis of clays of PG “Kislotoupor”. Stroitel’nye Materialy [Construction Materials]. 2011. No. 4, pp. 54–55. (In Russian). 
2. Ezersky V.A., Panferov A.I. Kaolinite Clay of Novoorsk deposit is an effective additive in production of face brick and clinker. Stroitel’nye Materialy [Construction Materials]. 2012. No. 5, pp. 19–21. (In Russian). 
3. Bogdanovsky A.L., Pishchik A.V. The use of clays of bol shaya karpovka deposit in production of building ceram ics. Stroitel’nye Materialy [Construction Materials]. 2012. No. 5, pp. 22–25. (In Russian).
4. Krolovetsky D.V., Gryzunov R.N. Voronezh Rudoupravleniye: development of the company and expansion of latnenskiye clays for ceramic brick. Stroitel’nye Materialy [Construction Materials]. 2015. No. 4, pp. 18–19. (In Russian). 
5. Zubehin A.P., Yatsenko N.D., Golovanova S.P. Theoretical Foundations of white and painting ceramics and Portland cement. Moscow: OOO RIF Stroymaterialy. 2014. 152 p. 
6. Penrose Roger The new mind of the king: About computers, thinking and the laws of physics: Tr. with the English. / General. Ed. V.O. Malyshenko. Foreword by G.G. Malinetsky. Ed. 2-nd, corrected. M.: Editorial URSS, 2005. 400 p. (Synergetics from the past to the future). 
7. Fayer M. Absolute minimum. How quantum theory explains our world. / Trans. With the English. A. Sergeev. St. Petersburg: Peter, 2016. 384 p. 
8. Mössbauer Mineral Handboack / Stevens J.G., Khasanov A.M., Miller J.W. Et al. Messburger Mineral Handbook, Biltmore Press, Ashville, NC. 2005. 626 p. 
9. Petelin A.D., Saprykin V.I., Klevakin V.A., Klevakina E.V. Features of application of clays of Nizhneuvelskoye deposit in the production of ceramic bricks. Stroitel’nye Materialy [Construction Materials. 2015. No. 4, pp. 28– 30. (In Russian). 
10. Petelin A.D., Saprykin V.I., Klevakin V.A., Klevakina E.V. Universal clays of the Nizhne-Uvelsky deposit for the production of ceramic building materials. Stroitel’nye Materialy [Construction Materials. 2017. No. 4, pp. 11–13. (In Russian).