Influence of Li2O doping on non-isothermal evolution of phases in K-Na-containing aluminosilicate matrix


The phase transformations in Li2O-doped model formulations (using 1-7% Li2CO3) which comprised 50% kaolin, 25% feldspar, and 25% quartz (in wt%), were investigated experimentally and with the aid of thermodynamic calculations between 900 degrees and 1350 degrees C. Experimental and theoretical approaches agree fairly well with another and indicated that the presence of Li2O and other alkalis, such as K2O, in aluminosificate matrices plays an important role in the phase transformations that occur at different temperatures during firing. Discrepancies in experimental results from thermodynamics have been attributed to slow kinetics, also likely because of the nature of the raw materials used.




Materials Science


Tulyaganov, DU; Agathopoulos, S; Fernandes, HR; Ferreira, JMF; Fabrichnaya, O

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