Journal of Materials Science

, Volume 42, Issue 18, pp 7950–7955 | Cite as

Disproportionation of Qm (0 ≤ m ≤ 4) species in partially devitrified Li2Si2O5 glasses with small amounts of P2O5

  • M. G. MortuzaEmail author
  • M. R. Ahsan
  • R. Dupree
  • D. Holland


The effect of addition of small amounts of P2O5 in the lithium disilicate glasses results in the scavenging of lithium metal ions by a phosphate group, Li3PO4. As a consequence of the scavenging, the silicate network partially repolymerises. The phosphate group remains intact during heat treatment of the optically clear, X-ray amorphous and slightly nucleated base glasses. However, the relative amounts of the silicate species, Qm (0 ≤ m ≤ 4), are dependent on the state of the glasses. These amounts, in the optically clear and X-ray amorphous, do not change with heat treatment but they do change, i.e. disproportionation occurs in the slightly nucleated and milky coloured glasses. The disproportionation follows the relation 2Q3 → Q2 + Q4 which is evident from the relative intensity of the different peaks.


Disproportionation Li2O Glass Ceramic Base Glass Li3PO4 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • M. G. Mortuza
    • 1
    Email author
  • M. R. Ahsan
    • 1
  • R. Dupree
    • 2
  • D. Holland
    • 2
  1. 1.Department of PhysicsUniversity of RajshahiRajshahiBangladesh
  2. 2.Department of PhysicsUniversity of WarwickCoventryUK

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