NMR INVESTIGATION OF THE STRUCTURE OF SOME BIOACTIVE AND RELATED GLASSES
UNSPECIFIED. (1995) NMR INVESTIGATION OF THE STRUCTURE OF SOME BIOACTIVE AND RELATED GLASSES. JOURNAL OF NON-CRYSTALLINE SOLIDS, 188 (3). pp. 207-219. ISSN 0022-3093Full text not available from this repository.
A magic angle spinning nuclear magnetic resonance (MAS-NMR) investigation of the environments of Si-29, (31)p and Na-23, in glasses from the Na2O-CaO-SiO2-(6 wt% P2O5) system, has shown that the distribution of non-bridging oxygens can be described by a binary distribution of Q(2) and Q(3) silicon species. The changes in the chemical shifts of these two species with composition are interpreted as resulting from the preferential association of Na+ with Q(3) and Ca2+ with Q(2). It is suggested that it is this partitioning that determines bioactivity by controlling the dissolution, hydrolysis and condensation reactions which occur at the interface between the glass and the physiological environment.
|Item Type:||Journal Article|
|Subjects:||T Technology > TP Chemical technology
T Technology > TA Engineering (General). Civil engineering (General)
|Journal or Publication Title:||JOURNAL OF NON-CRYSTALLINE SOLIDS|
|Publisher:||ELSEVIER SCIENCE BV|
|Official Date:||August 1995|
|Number of Pages:||13|
|Page Range:||pp. 207-219|
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