ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Mixtures of CaCO3∶SiO2 in 2∶1 molar ratio were subjected separated to thermal analysis with varying concentration of Cr2O3 (0.1 to 5%) as dopant. The activation energy (E a) and enthalpy (ΔH) shows a decreasing trend with 0.1 to 1% Cr2O3 and attains a minimum value with 1% dopant. 0.1 to 0.5% Cr2O3 helps in the formation of β and γ C2S, (Cement Chemistry notations, C = CaO, S = SiO2) phases at 1400° C and above but 1% Cr2O3 stabilizes β-C2S phase along with a little free lime and CaCrO4. A small quantity of CaCrO4, Cr2SiO2 and α-C2S are also formed along with the major phases with 5% Cr2O3 indicating that Cr3+ can substitute both Ca2+ and Si4+ ions in the C2S lattice.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00547929
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