NMR-spectroscopy study of compounds in sodium-aluminum phosphate glass-forming systems

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Atomic Energy (New York)

OSTI ID:62516

Vashman, A A; Pronin, I S; Polyakov, A S

The objective of this investigation was to explore a number of model systems used in the radioactive waste vitrification process. Using the method of NMR spectroscopy, the systems investigated consisted of water solutions of orthophosphoric acid, sodium/aluminium nitrates, as well as products of solid-state synthesis which form in the Na{sub 2}O-Al{sub 2}O{sub 3}-P{sub 2}O{sub 5} system. The data indicated that the difference between the liquid and solid phases of glass-forming compounds is that aluminum phosphate complexes form in the liquid stage, while sodium phosphate complexes form in the solid stage. There arises the problem of establishing the effect on the formation of the phosphate glass as the liquid phase of the glass forming transforms into the solid phase of radioactive waste processing. It is possible that the sodium phosphate compounds form in the solid phase as a result of the substitution of sodium for aluminum in the aluminum phosphate compounds. The presence of these latter compounds would be the determining factor in the final product of the waste vitrification process.

• OSTI ID: 62516
• Journal Information: Atomic Energy (New York), Journal Name: Atomic Energy (New York) Journal Issue: 6 Vol. 75; ISSN AENYEZ; ISSN 1063-4258
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
66 PHYSICS
ALUMINIUM OXIDES
GLASS
NMR SPECTRA
PHOSPHORUS OXIDES
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SODIUM OXIDES
STABILITY
VITRIFICATION
WASTE FORMS