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Influence of Li 2 O Doping on Non‐Isothermal Evolution of Phases in K–Na‐Containing Aluminosilicate Matrix
Author(s) -
Tulyaganov Dilshat U.,
Agathopoulos Simeon,
Fernandes Hugo R.,
Ferreira José M. F.,
Fabrichnaya Olga
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00696.x
Subject(s) - aluminosilicate , thermodynamics , isothermal process , feldspar , doping , phase (matter) , materials science , quartz , mineralogy , kinetics , matrix (chemical analysis) , chemistry , metallurgy , catalysis , physics , composite material , optoelectronics , organic chemistry , quantum mechanics , biochemistry
The phase transformations in Li 2 O‐doped model formulations (using 1–7% Li 2 CO 3 ), which comprised 50% kaolin, 25% feldspar, and 25% quartz (in wt%), were investigated experimentally and with the aid of thermodynamic calculations between 900° and 1350°C. Experimental and theoretical approaches agree fairly well with another and indicated that the presence of Li 2 O and other alkalis, such as K 2 O, in aluminosilicate 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.