Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis
Low-alkali borosilicate glass was used as the immobilization substrate, and Ce was used to replicate the trivalent and tetravalent actinides, in order to create simulated waste glass through melt heat treatment. The valence of Ce and solubility of CeO<sub>2</sub> in waste glass were stud...
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| author | Liu Yang Yongchang Zhu Jichuan Huo Zhu Cui Xingquan Zhang Xuanjiang Dong Jie Feng |
| author_facet | Liu Yang Yongchang Zhu Jichuan Huo Zhu Cui Xingquan Zhang Xuanjiang Dong Jie Feng |
| author_sort | Liu Yang |
| collection | DOAJ |
| description | Low-alkali borosilicate glass was used as the immobilization substrate, and Ce was used to replicate the trivalent and tetravalent actinides, in order to create simulated waste glass through melt heat treatment. The valence of Ce and solubility of CeO<sub>2</sub> in waste glass were studied as well as its network structure and thermal and chemical stability. The solubility of Ce in waste glass was examined by XRD and SEM. The network structure was examined by Raman spectroscopy. The valence of Ce was determined by X-ray photoelectron spectroscopy. Thermal analysis and product consistency (PCT) were employed to determine the thermal and chemical stability of waste glasses. The results show that the solubility of cerium in low-alkali borosilicate glasses is at least 25.wt.% and precipitates a spherical CeO<sub>2</sub> crystalline phase when it exceeds the solid solution limit; Ce is immobilized in the glass by entering the interstices of the glass network. Depolymerization and the transition from [BO<sub>3</sub>] to [BO<sub>4</sub>] occurs when CeO<sub>2</sub> doping levels rise. About 60 percent of Ce<sup>4+</sup> is converted to Ce<sup>3+</sup>, and the thermal stability of glass rises then falls with the increase of CeO<sub>2</sub>. All samples exhibit strong leaching resistance, with the average mass loss of Ce at 28 days being less than 10<sup>−4</sup> gm<sup>−2</sup>d<sup>−1</sup>. |
| first_indexed | 2024-03-11T00:53:20Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T00:53:20Z |
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| spelling | doaj.art-ef0f5ca4e6ad4d38abb63c0c6f0ab1e52023-11-18T20:17:27ZengMDPI AGMaterials1996-19442023-07-011614506310.3390/ma16145063Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure AnalysisLiu Yang0Yongchang Zhu1Jichuan Huo2Zhu Cui3Xingquan Zhang4Xuanjiang Dong5Jie Feng6State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, ChinaState Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, ChinaState Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, ChinaChina Building Materials Academy, Beijing 100024, ChinaState Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, ChinaChina Building Materials Academy, Beijing 100024, ChinaState Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, ChinaLow-alkali borosilicate glass was used as the immobilization substrate, and Ce was used to replicate the trivalent and tetravalent actinides, in order to create simulated waste glass through melt heat treatment. The valence of Ce and solubility of CeO<sub>2</sub> in waste glass were studied as well as its network structure and thermal and chemical stability. The solubility of Ce in waste glass was examined by XRD and SEM. The network structure was examined by Raman spectroscopy. The valence of Ce was determined by X-ray photoelectron spectroscopy. Thermal analysis and product consistency (PCT) were employed to determine the thermal and chemical stability of waste glasses. The results show that the solubility of cerium in low-alkali borosilicate glasses is at least 25.wt.% and precipitates a spherical CeO<sub>2</sub> crystalline phase when it exceeds the solid solution limit; Ce is immobilized in the glass by entering the interstices of the glass network. Depolymerization and the transition from [BO<sub>3</sub>] to [BO<sub>4</sub>] occurs when CeO<sub>2</sub> doping levels rise. About 60 percent of Ce<sup>4+</sup> is converted to Ce<sup>3+</sup>, and the thermal stability of glass rises then falls with the increase of CeO<sub>2</sub>. All samples exhibit strong leaching resistance, with the average mass loss of Ce at 28 days being less than 10<sup>−4</sup> gm<sup>−2</sup>d<sup>−1</sup>.https://www.mdpi.com/1996-1944/16/14/5063low-alkali borosilicateceriumRamanXPS |
| spellingShingle | Liu Yang Yongchang Zhu Jichuan Huo Zhu Cui Xingquan Zhang Xuanjiang Dong Jie Feng Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis Materials low-alkali borosilicate cerium Raman XPS |
| title | Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis |
| title_full | Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis |
| title_fullStr | Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis |
| title_full_unstemmed | Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis |
| title_short | Solubility and Valence Variation of Ce in Low-Alkali Borosilicate Glass and Glass Network Structure Analysis |
| title_sort | solubility and valence variation of ce in low alkali borosilicate glass and glass network structure analysis |
| topic | low-alkali borosilicate cerium Raman XPS |
| url | https://www.mdpi.com/1996-1944/16/14/5063 |
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