Micrograph Library
Browse the libraryAdvanced searchSystemsCompositionsTechniquesKeywordsPhase diagramsHelpPreferencesAbout the micrograph libraryTerms of useContribute micrographs!FeedbackLinksCredits Print this page
Micrograph 189 and full record
- Micrograph no
- 189
- Brief description
- Titanate ceramic for immobilising radioactive waste
- Keywords
- ceramic
, hollandite, loveringite, spinel , titanate, zirconolite - Categories
- Ceramic
- System
- Oxides + simulated fission products
- Composition
- Not specified
- Standard codes
- Reaction
- Processing
- Ti, Ca, Ba, Fe, Zr, Cr and Ni oxides + simulated fission products. Hot isostatically pressed at 1300ºC to maximise density.
- Applications
- Under development for immobilising high level radioactive waste. Many active species occupy lattice sites in the crystals.
- Sample preparation
- Polished but unetched
- Technique
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 30 μm
- Further information
- An assemblage of 5 mixed oxide phases and at least 2 metals. White phases are metals, either austenites (Fe,Ni,Mo,Ru) or silver. Oxide phases are by contrast: light grey is zirconolite (CaZrTi2O7 with some substituted species); mid grey is hollandite (Ba[Fe,Cr,Ti]8O16) with some Cs on Ba site; dark grey is perovskite loveringite (Ca[Ti,Fe,Cr,Zr]21O38) or spinel ([Fe,Ti,Cr]3O4).
- Contributor
- Dr E Maddrell
- Organisation
- BNFL plc, Sellafield
- Date
- 02/09/02
- Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International
View image alone .. in a new window
Help is available on downloading images