The formation kinetics of 20CaO·13Al2O3·3MgO·3SiO2 (Q phase) have been studied with quantitative X-ray diffraction method under the reaction conditions of temperature range of 1300–1375°C and 6 h temperature holding time. The results indicated that 12CaO·7Al2O3 (C12A7) and CaO·Al2O3 (CA) existed as intermediate phases and disappeared until the formation of Q phase was nearly completed. The formation temperature of Q phase is ∼1300°C, and its reaction equation is C2AS(C2S) + CA(CA2, C12A7) + f-MgO → Q phase. The solid–solid reaction kinetic model was used to fit the kinetic mechanism. It can be described fairly well by Ginstling–Brounstein equation. The apparent activation energy and preexponential factor for the reaction among CaCO3, Al2O3, MgO and SiO2 were respectively determined as 380 ± 10 kJ mol− 1 and 4·69 × 109 h− 1.
Berdtka,J. and Brown,T.1983. Effect of particle size on the kinetics of the reaction between magnesium and aluminum oxides, J. Am. Ceram. Soc., 66, (5), 383–388.
2.
Craig,D. B. and Chase,L. N.2012. Arrhenius plot for a reaction catalyzed by a single molecule of β-galactosidase, Anal. Chem., 84, (4), 2044–2047.
3.
Ghoroi,C. and Suresh,A.2007. Solid–solid reaction kinetics: formation of tricalcium aluminate, AIChE J., 53, (2), 502–513.
4.
Glasser,F. P. and Marr,J.1975. Quaternary phase in the system CaO–MgO–Al2O3–SiO2, Trans. Br. Ceram. Soc., 74, (4), 113–119.
5.
Kappalik,I. and Hanic,F.1980. Studies of the system CaO–MgO–Al2O3–SiO2 in relation to the quaternary phase Q, Trans. Br. Ceram. Soc., 79, (1), 128–133.
6.
Koga,N. and Criado,J.1998. Kinetic analyses of solid-state reactions with a particle-size distribution, J. Am. Ceram. Soc., 81, (11), 2901–2909.
7.
Lei,L. and Plank,J.2012. Synthesis, working mechanism and effectiveness of a novel cycloaliphatic superplasticizer for concrete, Cem. Concr. Res., 42, (1), 118–123.
8.
Luo,S. Y., Zhang,J. Y. and Zhou,T. P.2000. Solid state reaction kinetics of SrCO3 and TiO2, J. Chin. Ceram. Soc., 28, (5), 458–461.
9.
Meng,T., Li,Y. Q. and Yu,X. X.1998. Studies of CaO–Al2O3–MgO–SiO2 system in relation to the formation and hydration of Q phase, Bull. Chin. Ceram. Soc., 17, (3), 31–34.
10.
Midgley,H. G.1968. The composition and possible structure of the quatemary phase in high alumina cement and its relation to other phases in the system CaO–MgO–Al2O3, Trans. Br. Ceram. Soc., 67, 1–14.
11.
Mohamed,B. and Sharp,J.2001. Kinetics of formation of Ca12Al14O33 (dodecacalcium heptaaluminate). International Conference on Calcium Aluminate Cements: Institute of Ceramics, 65–76, Edinburgh, Scotland, Department of Engineering Materials, University of Sheffield.
12.
Mohamed,B. M. and Sharp,J. H.2002. Kinetics and mechanism of formation of tricalcium aluminate, Ca3Al2O6, Thermochim. Acta, 388, (1–2), 105–114.
13.
Parker,T. and Ryder,J.1954. The quaternary phase in high alumina cement. The 3rd International Congress on the Chemistry of Cement: Cement and Concrete Association, 485–489, London, England, Department of Scientific & Industrial Research.
14.
Rivas Mercury,J. M., De Aza,A. H. and Pena,P.2005. Synthesis of CaAl2O4 from powders: particle size effect, J. Eur. Ceram. Soc., 25, (14), 3269–3279.
15.
Sharp,J.1997. Kinetics and mechanism of formation of monocalcium aluminate, CaAl2O4, J. Mater. Chem., 7, (8), 1595–1599.
16.
Sharp,J., Brindley,G. and Achar,B. N.1966. Numerical data for some commonly used solid state reaction equations, J. Am. Ceram. Soc., 49, (7), 379–382.
17.
Šesták,J. and Berggren,G.1971. Study of the kinetics of the mechanism of solid-state reactions at increasing temperatures, Thermochim. Acta, 3, (1), 1–12.
18.
Schaube,F., Koch,L., Rner,W. and Müller-Steinhagen,H.2012. A thermodynamic and kinetic study of the de- and rehydration of Ca(OH)2 at high H2O partial pressures for thermo-chemical heat storage, Thermochim. Acta, 538, 9–20.
19.
Tannka,H.2005. The theory and practice of thermoanalytical kinetics of solid-state reactions, J. Therm. Anal. Calorim., 80, (3), 795–797.
20.
Wang,B., Yu,H. Y., Sun,H. L., Bi,S. W. and Tu,G. F.2009. Synthesis and Al2O3 leaching property of 20CaO·13Al2O3·3MgO·3SiO2, Chin. J. Nonferrous Met, 19, (2), 378–382.
21.
Wang,B., Yu,H. Y., Sun,H. L., Bi,S. W., Tu,G. F. and Geng,H. J.2008. Effect of MgO on the crystal structure and alumina leaching property of 12CaO·7Al2O3, Min. Metall. Eng., 5, 68–71.
22.
Wei,Y. Q., Wu,Y., Xing,X. M. and Wu,M. J.2012. Quantitative evaluation of hydrated cement modified by silica fume using QXRD,27Al MAS NMR, TG–DSC and selective dissolution techniques, Constr. Build. Mater., 36, 925–932.
