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Title: Evolutions of Molecular Oxygen Formation and Sodium Migration in Xe Ion Irradiated Borosilicate Glasses

Abstract

The modifications of a commercial borosilicate glass induced by Xe ion irradiation have been studied by Raman spectroscopy and ToF-SIMS depth profiling. A decrease in the average Si–O–Si angle, an increase in the population of three-membered rings and an increase of the glass polymerization are evidenced. The molecular oxygen appears in the irradiated glasses after the irradiation fluence reaches approximately 1015 ions/cm2. The O2 concentration decreaseswith the depth of irradiated glass at the ion fluence of 2 × 1016 ions/cm2. A sodiumdepleted layer at the surface and a depleted zone at around the penetration depth of 5 MeV Xe ions are observed. The thickness of the sodium depleted layer increases with the irradiation fluence. Moreover, comparing with previous results after electron and Ar ion irradiation, it can be concluded that the nuclear energy deposition can partially inhibit the formation of molecular oxygen and increase the threshold value of electron energy deposition for the molecular oxygen formation.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1290373
Report Number(s):
PNNL-SA-119310
Journal ID: ISSN 0022-3093; KP1704020
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Non-Crystalline Solids; Journal Volume: 448
Country of Publication:
United States
Language:
English
Subject:
borosilicate galss; ion radiation; molecular oxygen; sodium migration

Citation Formats

Chen, Liang, Zhang, Duofei F., Lv, Peng, Zhang, Jiandong, Du, Xing, Yuan, Wei, Nan, Shuai, Zhu, Zihua, and Wang, Tieshan. Evolutions of Molecular Oxygen Formation and Sodium Migration in Xe Ion Irradiated Borosilicate Glasses. United States: N. p., 2016. Web. doi:10.1016/j.jnoncrysol.2016.06.029.
Chen, Liang, Zhang, Duofei F., Lv, Peng, Zhang, Jiandong, Du, Xing, Yuan, Wei, Nan, Shuai, Zhu, Zihua, & Wang, Tieshan. Evolutions of Molecular Oxygen Formation and Sodium Migration in Xe Ion Irradiated Borosilicate Glasses. United States. doi:10.1016/j.jnoncrysol.2016.06.029.
Chen, Liang, Zhang, Duofei F., Lv, Peng, Zhang, Jiandong, Du, Xing, Yuan, Wei, Nan, Shuai, Zhu, Zihua, and Wang, Tieshan. 2016. "Evolutions of Molecular Oxygen Formation and Sodium Migration in Xe Ion Irradiated Borosilicate Glasses". United States. doi:10.1016/j.jnoncrysol.2016.06.029.
@article{osti_1290373,
title = {Evolutions of Molecular Oxygen Formation and Sodium Migration in Xe Ion Irradiated Borosilicate Glasses},
author = {Chen, Liang and Zhang, Duofei F. and Lv, Peng and Zhang, Jiandong and Du, Xing and Yuan, Wei and Nan, Shuai and Zhu, Zihua and Wang, Tieshan},
abstractNote = {The modifications of a commercial borosilicate glass induced by Xe ion irradiation have been studied by Raman spectroscopy and ToF-SIMS depth profiling. A decrease in the average Si–O–Si angle, an increase in the population of three-membered rings and an increase of the glass polymerization are evidenced. The molecular oxygen appears in the irradiated glasses after the irradiation fluence reaches approximately 1015 ions/cm2. The O2 concentration decreaseswith the depth of irradiated glass at the ion fluence of 2 × 1016 ions/cm2. A sodiumdepleted layer at the surface and a depleted zone at around the penetration depth of 5 MeV Xe ions are observed. The thickness of the sodium depleted layer increases with the irradiation fluence. Moreover, comparing with previous results after electron and Ar ion irradiation, it can be concluded that the nuclear energy deposition can partially inhibit the formation of molecular oxygen and increase the threshold value of electron energy deposition for the molecular oxygen formation.},
doi = {10.1016/j.jnoncrysol.2016.06.029},
journal = {Journal of Non-Crystalline Solids},
number = ,
volume = 448,
place = {United States},
year = 2016,
month = 7
}
  • We have performed classical molecular dynamics simulations in order to study the changes under compression in the local and medium range structural properties of three sodium borosilicate glasses with varying sodium content. These glasses have been isostatically compressed up to 20 GPa and then decompressed in order to analyze the different mechanisms that affect densification, alongside with the permanent modifications of the structure after a full compression/decompression cycle. The results show that the atomic packing is the prominent characteristic that governs the amount of densification in the glass, as well as the setup of the permanent densification. During compression, themore » bulk modulus increases linearly up to approximately 15 GPa and more rapidly for higher pressures, a behavior which is reflected on the rate of increase of the average coordination for B and Na. Radial distribution functions at different pressures during the cycle help to quantify the amount of distortions in the elementary structural units, with a pronounced shortening of the Na–Na and Na–O bond lengths during compression. A subsequent decomposition of the glassy matrix into elementary Voronoi volumes verifies the high compressibility of Na-rich regions.« less
  • Measurements of residence time prior to Na migration resulting from 600-keV proton irradiation of glasses are reported. The residence time was a function of the beam current (rather than current density), sample temperature, and glass composition. The residence time decreased exponentially with increasing current and increasing temperature.
  • Low-field (up to 1.5 T) {sup 11}B spectra and high-field (7.0 T) {sup 29}Si and {sup 23}Na NMR spectra were investigated for glasses in the RNa{sub 2}O-B{sub 2}O{sub 3}-2SiO{sub 2} system and discussed, using the first coordination shell (FCS) model. The results thus obtained make a valuable contribution to the data available in the literature.
  • The authors studied lithium, sodium, and potassium silicate glasses as well as sodium borosilicate glasses containing from 5 to 35 mole % oxides of metals from groups IB-VB. After irradiation at 77 and 300/sup 0/K, the glasses were investigated by optical and ESR spectroscopy at 77 and 300/sup 0/K. The irradiation was carried out on a /sup 60/Co ..gamma.. source. It was found that in the case of the lithium silicate, sodium silicate, potassium silicate and sodium borosilicate glasses containing oxides of Ag, Cd, Hg, Ga, Tl, Sn, and Pb, additional bands of optical absorption and ESR signals, besides themore » known optical absorption bands and ESR signals characteristic of the glasses without the metal oxides, appear after irradiation both at 77/sup 0/K and at 300/sup 0/K.« less