Hostname: page-component-76fb5796d-vvkck Total loading time: 0 Render date: 2024-04-29T09:21:05.840Z Has data issue: false hasContentIssue false
  • English
  • Français

Electron Irradiation of Zeolites

Published online by Cambridge University Press:  15 February 2011

S. X. Wang ,
L. M. Wang  and
R. C. Ewing
S. X. Wang
Affiliation:
Department of Nuclear Engineering & Radiological Sciences, The University of Michigan, Ann Arbor, MI 48109, USA, shixin@engin.umich.edu
L. M. Wang
Affiliation:
Department of Nuclear Engineering & Radiological Sciences, The University of Michigan, Ann Arbor, MI 48109, USA, shixin@engin.umich.edu
R. C. Ewing
Affiliation:
Department of Nuclear Engineering & Radiological Sciences, The University of Michigan, Ann Arbor, MI 48109, USA, shixin@engin.umich.edu
Get access

Abstract

Three different zeolites (analcime, natrolite, and zeolite-Y) were irradiated with 200 keV and 400 keV electrons. All zeolites amorphized under a relatively low electron fluence. The transformation from the crystalline-to-amorphous state was continuous and homogeneous. The electron fluences for amorphization of the three zeolites at room temperature were: 7.0× 1019 e/cm2 (analcime), 1.8×1020 e/cm2 (natrolite), and 3.4×1020 e/cm2 (zeolite-Y). The different susceptibilities to amorphization are attributed to the different channel sizes in the structures which are the pathways for the release of water molecules and Na+. Natrolite formed bubbles under electron irradiation, even before complete amorphization. Analcime formed bubbles after amorphization. Zeolite-Y did not form bubbles under irradiation. The differences in bubble formation are attributed to the different channel sizes of the three zeolites. The amorphization dose was also measured at different temperatures. An inverse temperature dependence of amorphization dose was observed for all three zeolites: electron dose for amorphization decreased with increasing temperature. This unique temperature effect is attributed to the fact that zeolites are thermally unstable. A semi-empirical model was derived to describe the temperature effect of amorphization in these zeolites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 361
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Ames, I. I., Amer. Min. 45 (1960) 689.Google Scholar
[2] Mimura, H., Akiba, K. and Kawamura, K., J. Nucl. Sci. Tech. 31 (1994) 463.Google Scholar
[3] Nava, I., Garcia-Sosa, I and Solache-Rios, M., J. Radio. Nucl. Chem. 191 (1995) 83.Google Scholar
[4] Ahluwalia, R. K., Geyer, H. K. and Ackerman, J. P., Indust. Engin. Chem. Res. 37 (1998) 145.Google Scholar
[5] Wang, L. M., Wang, S. X. and Ewing, R. C., Proc. Int. High-Level Radio. Waste Manag. Conf. (1998) 772.Google Scholar
[6] Storey, B. G. and Allen, T. R., Mat. Res. Soc. Symp. Proc. 504 (1998) in press.Google Scholar
[7] Babalan, R. T., Prikryl, J. D., Muller, P. M. and Dietrich, T. B., Mat. Res. Soc. Symp. Proc. 294 (1993) 777.Google Scholar
[8] Yokota, Y., Hashimoto, H. and Yamaguchi, T., Ultramicroscopy 54 (1994) 207.Google Scholar
[9] Bando, Y., Inst. Phys. Conf. Series, 93 (1988) 131.Google Scholar
[10] Wang, S. X., Wang, L. M., Ewing, R. C. and Doremus, R. H., J. Non-Cryst. Solids 238 (1998) 214.Google Scholar
[11] Gong, W. L., Wang, L. M., Ewing, R. C. and Zhang, J., Phys. Rev. B 54 (1996) 3800.Google Scholar
[12] Bewlistsky, I. A., Fursenko, B. A., Gabuda, S. P., Kholdeev, O. V. and Seryotkin, Y. V., Phys. Chem. Min. 18 (1992).Google Scholar
[13] Sinha, P. K. and Krishnasamy, V., J. Nucl. Sci. Tech. 33 (1996) 333.Google Scholar
[14] Kosanovic, C. and Subotic, B., Microporous Mater. 12 (1997) 261.Google Scholar
[15] Dimitrijevic, R., Kremenovic, A., Dondur, V., TomasevicCanovic, M. and Mitrovic, M., J. Phys. Chem. B 101 (1997) 3931.Google Scholar
[16] Bulow, M. and Struve, P., Characterization of Porous Solids 11187 (1994) 551.Google Scholar