| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5437851 | Ceramics International | 2017 | 5 Pages |
Abstract
Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 °C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 °C which was the lowest reported temperature of CsAlSi5O12 formation in pressureless sintered Cs-exchanged clinoptilolite. CsAlSi5O12 formation was preceded by complete amorphisation of Cs-exchanged clinoptilolite in temperature range between 700 and 900 °C. Bearing in mind that clinoptilolite possesses high affinity for Cs cation it is believed that hot pressing of Cs-exchanged clinoptilolite might be an efficient way to immobilize radioactive Cs by its incorporation into crystal lattice of stable CsAlSi5O12. The samples sintered at 950 °C had relative density about 84% of theoretical density and open porosity of only 6% which is expected to result in low Cs leaching rate.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Mia OmeraÅ¡eviÄ, Jovana RužiÄ, Bojana NediÄ VasiljeviÄ, Zvezdana BaÅ¡ÄareviÄ, DuÅ¡an BuÄevac, Jovana OrliÄ, Ljiljana MatoviÄ,