Single phase ((NZP)) ceramic radioactive waste form. [NaZr/sub 2/P/sub 3/O/sub 12/]
Conference
·
· Mater. Res. Soc. Symp. Proc.; (United States)
OSTI ID:5857757
It has been shown that between 10 and 20% of a simulated PW-4b radwaste composition can be incorporated into a single phase with the NZP (= 'NaZr/sub 2/P/sub 3/O/sub 12/') structure. By changing the P/Na and Zr/Na molar ratios (i.e., adjusting the crystal chemical model of where each ion is located in the structure) it has been possible to outline a very forgiving compositional regime both at the 10% and the 20% waste loading level within which one obtains one ((NZP)) or two ((NZP) and (monazite)) phases. We have also succeeded in substituting TiO/sub 2/ for ZrO/sub 2/ in making a TiO/sub 2/-rich (NTP) waste form analogous to the (NZP) materials. Thus we have succeeded in creating monophasic and diphasic ceramic waste forms which can be sintered below 1000/sup 0/C. Only preliminary leach data have been obtained at 25/sup 0/ and 300/sup 0/C, and they place this material with good ceramic forms.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 5857757
- Report Number(s):
- CONF-821107-Pt.1
- Conference Information:
- Journal Name: Mater. Res. Soc. Symp. Proc.; (United States) Journal Volume: 15
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052001 -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
CERAMICS
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
MATERIALS
MINERALS
MONAZITES
MORPHOLOGY
NUMERICAL DATA
OXYGEN COMPOUNDS
PHASE STUDIES
PHOSPHATES
PHOSPHORUS COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RARE EARTH COMPOUNDS
SODIUM COMPOUNDS
SODIUM PHOSPHATES
STABILITY
TEMPERATURE EFFECTS
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
CERAMICS
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
INFORMATION
LATTICE PARAMETERS
MATERIALS
MINERALS
MONAZITES
MORPHOLOGY
NUMERICAL DATA
OXYGEN COMPOUNDS
PHASE STUDIES
PHOSPHATES
PHOSPHORUS COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RARE EARTH COMPOUNDS
SODIUM COMPOUNDS
SODIUM PHOSPHATES
STABILITY
TEMPERATURE EFFECTS
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES