BINGHAM, Paul and HAND, R.J. (2008). Sulphate incorporation and glass formation in phosphate systems for nuclear and toxic waste immobilization. Materials Research Bulletin, 43 (7), 1679-1693.Full text not available from this repository.
Glassformation and the capacity for sulphur incorporation have been investigated within the systems P2O5–Al2O3–Na2O–Fe2O3 and P2O5–Fe2O3–RyO (R = Li, Na, K, Mg, Ca, Ba, Pb). Linear relationships have been identified linking log [SO3] with the oxide ion activity, which can be represented to varying degrees by normalized cation field strength index ∑(z/a2), theoretical optical basicity Λth, oxygen to phosphorus molar ratio [O]/[P], or P2O5 content. When prepared under oxidizing conditions only basic, highly depolymerized phosphate glasses for which ∑(z/a2) < ∼1.2; Λth > ∼0.5; [O]/[P] > ∼3.8; or P2O5 content <∼40 mol% can incorporate levels of sulphur that could be considered useful from a waste immobilization perspective. Data for several phosphate and borosilicate glasses suggest that the ∑(z/a2) scale provides the best residual fitting error and that if glasses are considered within their familial limits, this can provide a useful methodology for predicting sulphur capacity.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology|
|Depositing User:||Helen Garner|
|Date Deposited:||11 Apr 2012 13:43|
|Last Modified:||11 Apr 2012 13:43|
Actions (login required)
Downloads per month over past year