Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing

Omerasević, Mia; Ruzic, Jovana; Nedic-Vasiljević, Bojana; Baščarević, Zvezdana; Bucevac, Dusan; Orlic, Jovana; Matović, Ljiljana

doi:10.1016/j.ceramint.2017.07.055

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2017

Authors

Omerasević, Mia

Ruzic, Jovana
Nedic-Vasiljević, Bojana

Baščarević, Zvezdana

Bucevac, Dusan

Orlic, Jovana
Matović, Ljiljana

Article (Published version)

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Abstract

Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 degrees C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 degrees 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 degrees 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 degrees 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.

Keywords:

Ion exchange / Hot-pressing / Cs disposal / Clinoptilolite / CAS phase

Source:
Ceramics International, 2017, 43, 16, 13500-13504

Publisher:

Elsevier Sci Ltd, Oxford

Funding / projects:

DOI: 10.1016/j.ceramint.2017.07.055

ISSN: 0272-8842

WoS: 000411299300059

Scopus: 2-s2.0-85024498518

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	7
	5

TY  - JOUR
AU  - Omerasević, Mia
AU  - Ruzic, Jovana
AU  - Nedic-Vasiljević, Bojana
AU  - Baščarević, Zvezdana
AU  - Bucevac, Dusan
AU  - Orlic, Jovana
AU  - Matović, Ljiljana
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1047
AB  - Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 degrees C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 degrees 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 degrees 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 degrees 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.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing
EP  - 13504
IS  - 16
SP  - 13500
VL  - 43
DO  - 10.1016/j.ceramint.2017.07.055
ER  -

@article{
author = "Omerasević, Mia and Ruzic, Jovana and Nedic-Vasiljević, Bojana and Baščarević, Zvezdana and Bucevac, Dusan and Orlic, Jovana and Matović, Ljiljana",
year = "2017",
abstract = "Dense CsAlSi5O12 was successfully obtained by hot pressing of Cs-exchanged clinoptilolite at 900 degrees C. Simultaneous application of high temperature and mechanical pressure allowed formation of CsAlSi5O12 at temperature considerably lower than 1150 degrees 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 degrees 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 degrees 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.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing",
pages = "13504-13500",
number = "16",
volume = "43",
doi = "10.1016/j.ceramint.2017.07.055"
}

Omerasević, M., Ruzic, J., Nedic-Vasiljević, B., Baščarević, Z., Bucevac, D., Orlic, J.,& Matović, L.. (2017). Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(16), 13500-13504.
https://doi.org/10.1016/j.ceramint.2017.07.055

Omerasević M, Ruzic J, Nedic-Vasiljević B, Baščarević Z, Bucevac D, Orlic J, Matović L. Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing. in Ceramics International. 2017;43(16):13500-13504.
doi:10.1016/j.ceramint.2017.07.055 .

Omerasević, Mia, Ruzic, Jovana, Nedic-Vasiljević, Bojana, Baščarević, Zvezdana, Bucevac, Dusan, Orlic, Jovana, Matović, Ljiljana, "Transformation of Cs-exchanged clinoptilolite to CsAlSi5O12 by hot-pressing" in Ceramics International, 43, no. 16 (2017):13500-13504,
https://doi.org/10.1016/j.ceramint.2017.07.055 . .