Steklo i Keramika (Glass and Ceramics). Monthly scientific, technical and industrial journal

 

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The behavior of mixtures 6Al 2 Si 2 O 7 : 12NaOH and 6Al 2 Si 2 O 7 : 12NaOH: 2Al 2 O 3 during heat treatment. It was shown that after ultrasonic treatment of the suspension, its evaporation, granulation of the paste, and drying, a hydrated LTA zeolite is formed. It was found that at temperatures up to 700 & # 176; C, sodium aluminosilicate Na 6 Al 4 Si 4 O 17 . After heat treatment at temperatures above 800 & # 176; C, sodium aluminosilicate Na 8 Al 4 Si 4 O 18 < / sub>, mullite and nepheline. It is shown that calculations by the isoconversion methods of Friedman (differential) and Kissinger - Akahir - Sunose (integral), for which the temperature range 500 - 800 ° C is of interest, give close values ??of E. An increase in the apparent activation energy with an increase in the degree of conversion indicates changing the reaction mechanism
Cand. tech. N.E. GORDINA ( e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.), Dr. Sci. V. Yu. PROKOFIEV ( e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ), N. V. SHAMANAEVA, T. N. BORISOVA, E. M. KONSTANTINOVA, V. V. VOYNOVA; Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemical Technology (Russia, Ivanovo)
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GORDINA N. E., PROKOF?EV V. Yu., SHAMANAEVA N. V., BORISOVA T. N., KONSTANTINOVA E. M., VOYNOVA V. V. Thermal Behavior of Mixtures Based on Metacaolin and Sodium Hydroxide. Steklo i keramika. 2020:93(1):10-16. (in Russ). UDK 544.461:543.573