Novel synthetic routes for synroc
- Tulane Univ., New Orleans, LA (United States)
Several methods have been developed for the immobilization of radionuclides into the highly-leach resistant waste form known as Synroc. This material is a synthetic ceramic material composed predominantly of three crystalline phases: perovskite (CaTiO{sub 3}), hollandite (BaAl{sub 2}Ti{sub 6}O{sub 16}) and zirconolite (CaZrTi{sub 2}O{sub 7}). These phases are capable of incorporating, as a solid solution, all the metal ions associated with radioactive waste. In this investigation, metal carboxylate-based preceramics are prepared either by co-precipitation, ion-exchange, or chemical conversions so that homogeneous mixing of the radioactive waste elements and the Synroc matrix elements is realized. These preceramics convert to Synroc at relatively low-temperatures without the necessity of a redox buffer.
- OSTI ID:
- 520411
- Report Number(s):
- CONF-9604124--
- Country of Publication:
- United States
- Language:
- English
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