Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-05T21:11:16.575Z Has data issue: false hasContentIssue false
  • English
  • Français

The growth of calcium metasilicate polymorphs from supercooled melts and glasses

Published online by Cambridge University Press:  05 July 2018

R. M. Weston  and
P. S. Rogers
R. M. Weston
Affiliation:
Department of Metallurgy and Materials Science, Imperial College, London SW7 2BP
P. S. Rogers
Affiliation:
Department of Metallurgy and Materials Science, Imperial College, London SW7 2BP
Get access Rights & Permissions [Opens in a new window]

Summary

The morphology of calcium metasilicate produced during the crystallization of glasses and melts of approximately metasilicate composition has been investigated. Both isothermal heat treatments and a dynamic crystal-pulling technique were employed. The crystallization took place by a dendritic or spherulitic mechanism, according to which of the crystal polymorphs is stable under the prevailing conditions. The morphology of the crystals is controlled by the ease with which the anionic groups present in the amorphous phase can be incorporated into the growing crystals. This is reflected in the values of the activation energies of crystal growth found for α-CaSiO3 (160 kJ mol−1) and for β-CaSiO3 (319 to 383 kJ mol−1). The Keith and Padden theory of spherulitic crystallization was verified for the growth of β-CaSiO3 over a range of supercoolings. Time-temperature-transformation diagrams have been constructed from the experimental data.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 323 , September 1978 , pp. 325 - 335
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Andrews, (R. W.), 1970. Wollastonite, Institute of Geological Sciences, H.M.S.O., 1-6.Google Scholar
Bernauer, (F.), 1929. Gedrillte Kristalte, Bornträger, Berlin.Google Scholar
Buckner, (D.) and Roy, (R.), 1955. Geol. Soc. Am. Bull. 66, 1536-7.Google Scholar
Doremus, (R. H.), 1963. Modern Aspects of the Vitreous State, 2, London (Butterworths), 1–71.Google Scholar
Doremus, (R. H.), 1973. Glass science, New York and London (Wiley Interscience), 170.Google Scholar
Jeffery, (J. W.), 1953. Acta Crystallogr. 6, 821-5.CrossRefGoogle Scholar
Jeffery, (J. W.), 1964. The Chemistry of Cements, 1, London (Academic Press), 138-42.Google Scholar
Jeffery, (J. W.) and Heller, (L.), 1953. Acta Crystallogr. 6, 807-8.CrossRefGoogle Scholar
Keith, (H. D.) and Padden, (J. G.), 1963. J. Appl. Phys. 34, 2409-21.CrossRefGoogle Scholar
Lofgren, (G.), 1974. Am. J. Sci. 273, 243-73.CrossRefGoogle Scholar
Mackenzie, (J. D.), 1960. Modern Aspects of the Vitreous State, 1, London (Butterworths), 188–218.Google Scholar
Mukherjee, (S. P.) and Rogers, (P. S.), 1967. Phys. Chem. Glasses, 8, 81-7.Google Scholar
Maries, (A.) and Rogers, (P. S.), 1975. Nature, 252, 401-2.CrossRefGoogle Scholar
Maries, (A.) and Rogers, (P. S.), 1977. Proc. 11th Internat. Congr. Glass, Prague, 2, 151-60.Google Scholar
Maries, (A.) and Rogers, (P. S.), 1978. J. Mater. Sci. (in press).Google Scholar
Maries, (A.) Rogers, (P. S.), and Weston, (R. M.), 1975. Microstructure of Ceramics, Abstracts of British Ceramic Society Convention, 18-1 to 18-3.Google Scholar
Prewitt, (C. J.) and Peacor, (D. R.), 1964. Am. Mineral. 49, 1527-42.Google Scholar
Rogers, (P. S.) and Williamson, (J.), 1972. Verres Réract. 26, 53-6.Google Scholar
Rutter, (J. W.) and Chalmers, (B.), 1953. Can. J. Phys. 31, 15.CrossRefGoogle Scholar
Swift, (H. R.), 1947. J. Am. Ceram. Soc. 30, 170-4.CrossRefGoogle Scholar
Tammann, (G.), 1899. Z. Phys. Chem. 25, 441.Google Scholar
Tashiro, (M.), Kokubo, (T.), Ito, (S.), and Arioka, (M.), 1975. Bull. Inst. Chem. Res., Kyoto University, 53, 471-88.Google Scholar
Tolliday, (J.), 1958. Nature, 182, 1012-13.CrossRefGoogle Scholar
Weston, (R. M.), 1977. Ph.D. thesis, University of London.Google Scholar
Williamson, (J.), 1970. Mineral. Mag. 37, 759-70.CrossRefGoogle Scholar
Williamson, (J.), Tipple, (A. J.), and Rogers, (P. S.), 1968. J. Iron Steel Inst. 206, 899–903.Google Scholar
Williamson, (J.), Tipple, (A. J.), and Rogers, (P. S.), 1969. J. Mater. Sci. 4, 1069-74.CrossRefGoogle Scholar