skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extended electron energy loss fine structure simulation of the local boron environment in sodium aluminoborosilicate glasses containing gadolinium

Abstract

Gadolinium can be dissolved in sodium-alumino-borosilicate glasses up to 47 wt% in a baseline borosilicate glass (mol%) 20 B2O3, 5 Al2O3, 60 SiO2,and 20 Na2O. Understanding of Gd dissolution in borosilicate melts is important in glass formulation optimization. Electron energy loss fine structure (ELFS) spectroscopy is chosen, which provides well resolved local atomic structure information for both amorphous and crystalline materials with high sensitivity to low Z elements such as Al, B, Na, O, and Si where the x-ray absorption fine structure (XAFS) technique faces experimental difficulty. In this study, we report our results of boron K-edge ELFS study. Two borosilicate glass samples with 30 and 47 mass% Gd2O3, B20Gd30 and B20Gd47were chosen for B K-edge ELFS study. EEL spectra were acquired on a Philips 430 TEM equipped with Gatan PEELS system 666 and EL/P 2.1 software with Custom function AcqLong. The ELFS data analysis was performed using UWELFS, UWXAFS and FEFF software. From our Gd solubility study, the local structure of Gd in the borate environment possibly resembles double chain structure found in crystalline Gd(BO2)3 as proposed by Chakraborty et al. The B/Gd ratio's in both glasses are smaller then 3, which means the excess Gd atoms in themore » Si-sites would be 17 and 60 mol% of the total Gd atoms, respectively according to the model, yet the local environment of borate sites saturated with Gd should be remained. To verity above hypothesis, the double chain structure model was applied to fit boron K-edge. The model was shown to well fit experimental boron K-edge EELS spectra for both glasses with some degree of distance distortion which is understandable in amorphous structure. Therefore, it is very likely that Gd stabilized in borate sites has a local structure resembling the double chain Gd(BO2)3 structure as proposed by our solubility study and literature.« less

Authors:
 [1];  [2];  [3];  [3]
  1. (Charles Evans & Associates)
  2. (PPG Industries, Inc)
  3. (BATTELLE (PACIFIC NW LAB))
Publication Date:
Research Org.:
Pacific Northwest National Lab., Richland, WA (US) (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15005811
Report Number(s):
PNNL-SA-39010
KP1301020; TRN: US200324%%226
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Non-crystalline Solids
Additional Journal Information:
Journal Volume: 328; Journal Issue: 1-3; Other Information: PBD: 15 Oct 2003
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ENERGY-LOSS SPECTROSCOPY; BORON; BOROSILICATE GLASS; DATA ANALYSIS; FINE STRUCTURE; GADOLINIUM; SODIUM OXIDES; ALUMINIUM OXIDES; CRYSTAL STRUCTURE; ELFS; TEM; GLASS

Citation Formats

Qian, Morris, Li, Hong, Li, Liyu, and Strachan, Denis M. Extended electron energy loss fine structure simulation of the local boron environment in sodium aluminoborosilicate glasses containing gadolinium. United States: N. p., 2003. Web. doi:10.1016/S0022-3093(03)00477-0.
Qian, Morris, Li, Hong, Li, Liyu, & Strachan, Denis M. Extended electron energy loss fine structure simulation of the local boron environment in sodium aluminoborosilicate glasses containing gadolinium. United States. doi:10.1016/S0022-3093(03)00477-0.
Qian, Morris, Li, Hong, Li, Liyu, and Strachan, Denis M. Wed . "Extended electron energy loss fine structure simulation of the local boron environment in sodium aluminoborosilicate glasses containing gadolinium". United States. doi:10.1016/S0022-3093(03)00477-0.
@article{osti_15005811,
title = {Extended electron energy loss fine structure simulation of the local boron environment in sodium aluminoborosilicate glasses containing gadolinium},
author = {Qian, Morris and Li, Hong and Li, Liyu and Strachan, Denis M.},
abstractNote = {Gadolinium can be dissolved in sodium-alumino-borosilicate glasses up to 47 wt% in a baseline borosilicate glass (mol%) 20 B2O3, 5 Al2O3, 60 SiO2,and 20 Na2O. Understanding of Gd dissolution in borosilicate melts is important in glass formulation optimization. Electron energy loss fine structure (ELFS) spectroscopy is chosen, which provides well resolved local atomic structure information for both amorphous and crystalline materials with high sensitivity to low Z elements such as Al, B, Na, O, and Si where the x-ray absorption fine structure (XAFS) technique faces experimental difficulty. In this study, we report our results of boron K-edge ELFS study. Two borosilicate glass samples with 30 and 47 mass% Gd2O3, B20Gd30 and B20Gd47were chosen for B K-edge ELFS study. EEL spectra were acquired on a Philips 430 TEM equipped with Gatan PEELS system 666 and EL/P 2.1 software with Custom function AcqLong. The ELFS data analysis was performed using UWELFS, UWXAFS and FEFF software. From our Gd solubility study, the local structure of Gd in the borate environment possibly resembles double chain structure found in crystalline Gd(BO2)3 as proposed by Chakraborty et al. The B/Gd ratio's in both glasses are smaller then 3, which means the excess Gd atoms in the Si-sites would be 17 and 60 mol% of the total Gd atoms, respectively according to the model, yet the local environment of borate sites saturated with Gd should be remained. To verity above hypothesis, the double chain structure model was applied to fit boron K-edge. The model was shown to well fit experimental boron K-edge EELS spectra for both glasses with some degree of distance distortion which is understandable in amorphous structure. Therefore, it is very likely that Gd stabilized in borate sites has a local structure resembling the double chain Gd(BO2)3 structure as proposed by our solubility study and literature.},
doi = {10.1016/S0022-3093(03)00477-0},
journal = {Journal of Non-crystalline Solids},
number = 1-3,
volume = 328,
place = {United States},
year = {2003},
month = {10}
}