Journal of Materials Science

, Volume 33, Issue 9, pp 2251–2254 | Cite as

The chemistry of cements formed between zinc oxide and aqueous zinc chloride

  • J. W Nicholson
  • L Parker


A series of cements has been prepared from zinc oxide powder and aqueous zinc chloride, using solutions corresponding to concentrations of 20%, 30%, 40%, 50% and 60% and a ratio of ZnO powder to zinc chloride solution of 1:1. As with cements of the zinc oxide/zinc nitrate system, these ZnO/ZnCl2 cements were found to be weak in compression (not exceeding 10 MPa) with strength rising with increasing concentration of ZnCl2. The pH change as the reaction proceeded was monitored and generally showed a rapid increase, followed by a slight decrease, and a subsequent slower increase. This is assumed to arise because the doubly charged aquo-zinc cation, Zn(H2O)2+n (n=4 or 6) behaves as a weak acid, due to so-called salt hydrolysis: Zn(H2O)2+n+H2O⇌ZnOH(H2O)+(n-1)+H3O+ and reacts to form a salt, thus setting up a classic weak acid/salt buffer system. Finally, cements were stored in water for 1 month, and were generally found to increase in mass during the first week, with the greatest increase occurring in the cement made from 20% ZnCl2 solution. All cements lost mass between 1 week and 1 month, showing them to be sparingly soluble at room temperature. © 1998 Chapman & Hall


Polymer Zinc Nitrate Hydrolysis Great Increase 
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  1. 1.
    S. Sorel, Compt. Rend. Hebdomadaire Seances Acad. Sci. 41 (1855) 784.Google Scholar
  2. 2.
    A. D. Wilson, in “Scientific Aspects of Dental Materials”, edited by J. A. Fraunhoffer (Butterworths, London, 1975) Ch. 5, p. 159.Google Scholar
  3. 3.
    D. C. Smith, Br. Dent. J. 125 (1968) 381.Google Scholar
  4. 4.
    J. R. Anderson and G.E. Myers, J. Dent. Res. 145 (1966) 379.Google Scholar
  5. 5.
    A. D. Wilson and J. W. Nicholson, “Acid-Base Cements: Their biomedical and industrial applications” (Cambridge University Press, Cambridge, 1993).Google Scholar
  6. 6.
    A. Droit, Compt. Rend. Hebdomadaire Seances Acad. Sci. 150 (1910) 1426.Google Scholar
  7. 7.
    W. Feitknecht, Helv. Chim. Acta. 13 (1930) 22.Google Scholar
  8. 8.
    E. Hayek, Z. Anorg. Allgen. Chem. 207 (1932) 41.Google Scholar
  9. 9.
    W. Feitknecht, Helv. Chim. Acta 16 (1933) 427.Google Scholar
  10. 10.
    W. Feitknecht, H. R. Oswald and H. E. Forsberg, Cheminia 13 (1959) 113.Google Scholar
  11. 11.
    C. A. Sorrell, J. Am. Ceram. Soc. 60 (1977) 217.Google Scholar
  12. 12.
    T. Demediuk and W. F. Cole, Aust. J. Chem. 10 (1957) 287.Google Scholar
  13. 13.
    W. F. Cole and T. Demediuk, ibid. 8 (1955) 234.Google Scholar
  14. 14.
    J. W. Nicholson and J. P. Tibaldi, J. Mater. Sci. 27 (1992) 2420.Google Scholar
  15. 15.
    L. Urwongse and C. A. Sorrell, J. Am. Ceram. Soc. 63 (1980) 523.Google Scholar
  16. 16.
    S. C. Bovis, E. Harrington and H. J. Wilson, Br. Dent. J 131 (1971) 352.Google Scholar
  17. 17.
    J. A. Duffy and M. D. Ingram, Inorg. Chem. 17 (1978) 2798.Google Scholar
  18. 18.
    Idem., ibid. 16 (1977) 2988.Google Scholar
  19. 19.
    D. H. McDaniel, ibid. 18 (1979) 1412.Google Scholar
  20. 20.
    W. D. Cook and P. Brockhurst, J. Dent. Res. 59 (1980) 795.Google Scholar
  21. 21.
    N. N. Greenwood and A. Earnshaw, “Chemistry of the Elements” (Pergamon Press, Oxford, 1984).Google Scholar

Copyright information

© Chapman and Hall 1998

Authors and Affiliations

  • J. W Nicholson
    • 1
  • L Parker
    • 2
  1. 1.Biomaterials DepartmentKing's College School of Medicine and DentistryLondonUK
  2. 2.Science DepartmentThe College of North-East LondonLondonUK

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