par De Keyser, W.L. 
Référence Bulletin des Sociétés chimiques belges, 64, 7-8, page (395-408)
Publication Publié, 1955
Référence Bulletin des Sociétés chimiques belges, 64, 7-8, page (395-408)
Publication Publié, 1955
Article révisé par les pairs
| Résumé : | This work has been carried on with the same methods as those used in our earlier work on reactions in the solid state of the system (Al2O3, SiO2, CaO) (Bull. Soc. Chim. Belg. 1951 n° 60, 1953 n° 62, 1954 n° 63). Samples were prepared by mixing pure oxides of Ca, Fe, Al in the following proportions: 2 CaO+Fe2O3; 6 CaO+Al2O3+2 Fe2O3; 4 CaO+Al2O3+Fe2O3; 6 CaO+Al2O3+Fe2O3. After heating to temperatures ranging from 500°C, to 1300°C, the samples were examined by XR. For the interpretation of the results, differential thermal analysis and differential thermogravimetry were used. The following conclusions were reached: 1°—For all the mixtures the first compound formed by heating is C2F (from about 800°C). The compound CF is formed at a higher temperature and its percentage is at its maximum at 1000°. At an even higher temperature CF disappears by reaction with C and formation of C2F. For the mixtures containing Al2O3, A3C5 is formed between 1000° and 1250°C. At a higher temperature a solid solution appears. 2°—By D. T. A., it was found that the speed of formation of C2F is at its maximum at about 1200°C. 3°—D. G. A. showed that in mixtures of CO3Ca and Fe2O3, the reaction of CaO with Fe2O3 begins at a temperature lower than that corresponding to the decomposition of CO3Ca. Copyright © 1955 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
