Add time:08/01/2019         Source:sciencedirect.com

In this work, pyrochlore (cas 12174-36-6) glass-ceramics (GCs)for uranium immobilization were synthesized by a pretreatment and melting-heat treatment method. The effects of different uranium contents on the phase composition, microstructure, uranium valence and chemical durability of the glass-ceramics were systematically investigated. With increasing uranium content, pyrochlore was always the dominant phase internally crystallized in the glass. CaAl2Si2O8, UTi2O6 and U3O8were gradually observed as minor phases in the glass-ceramics. The growth of pyrochlore enriched with uranium at different uranium contents and the overall distribution of uranium in the glass-ceramics were revealed by SEM. The uranium valence states in the samples were confirmed by XPS to be a mixture of tetravalent and hexavalent states. In addition, the GC3 sample with a high uranium waste content of 16.96 wt% exhibited a low uranium leaching rate.

We also recommend Trading Suppliers and Manufacturers of pyrochlore (cas 12174-36-6). Pls Click Website Link as below: cas 12174-36-6 suppliers