Mortuza, M. G., Ahsan, M. R., Dupree, Ray and Holland, D.. (2007) Disproportionation of Q m (0 ≤ m ≤ 4) species in partially devitrified Li2Si2O5 glasses with small amounts of P2O5. Journal of Materials Science, Vol.42 (No.18). pp. 7950-7955. ISSN 0022-2461

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Abstract

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, Q(m) (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 2Q(3) -> Q(2) + Q(4) which is evident from the relative intensity of the different peaks.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Journal of Materials Science
Publisher:	Springer
ISSN:	0022-2461
Date:	September 2007
Volume:	Vol.42
Number:	No.18
Number of Pages:	6
Page Range:	pp. 7950-7955
Identification Number:	10.1007/s10853-006-1398-4
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/31562

Data sourced from Thomson Reuters' Web of Knowledge

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