Cerium influence on the thermal properties and structure of high-alkaline borosilicate glasses
- 46 Downloads
The influence of cerium oxide on the thermal properties and the glass structure has been studied for the Li2O–(Na2O–K2O)–B2O3–SiO2 system. It has been established that cerium is completely soluble in the quenched glass during the synthesis if addition of CeO2 is 0–10 mol%. The cubic ceria phase is formed in glass either during the synthesis if addition of CeO2 is 20 mol% or after thermal treatment (annealing) if the glass contains 10–20 mol% of CeO2. The studied lithium borosilicate glasses have low thermal stability and demonstrate significant difference in the crystal phase formation for Ce-free and Ce-containing glasses after annealing. The lithium–sodium and lithium–potassium glasses have much higher thermal stability toward crystallization regardless of Ce content. The obtained results are relevant for improving the properties of matrix materials of similar borosilicate systems used for immobilization of radioactive waste.
KeywordsBorosilicate glass Thermal properties Cerium Crystallization
The results were obtained while performing the state assignment of Russian Ministry of High Education and Science (Project 5-100, Projects 11.9643.2017/8.9, 4.5749.2017/7.8 and 015-00613-019-00), partially supported by Act 211 Government of the Russian Federation, Contract No. 02.A03.21.0011.
- 1.Hayward PJ. Glass-ceramics. In: Lutze W, Ewing RC, editors. Radioactive waste forms for the future. Amsterdam: Elsevier; 1988.Google Scholar
- 3.Caurant D, Loiseau P, Majérus O, Aubin-Chevaldonnet V, Bardez I, Quintas A. Glasses, glass-ceramics and ceramics for immobilization of highly radioactive nuclear wastes. New York: Nova Science Publishers; 2009.Google Scholar
- 8.Wang Z, Cheng L. Structural features and synthesis of CeO2-doped boroaluminosilicate oxyfluoride transparent glass ceramics. J Chem. 2015; ID 597537.Google Scholar
- 18.Polyakova IG. Alkali borosilicate systems: phase diagrams and properties of glasses. Phys Chem Glass. 2000;41(5):247–58.Google Scholar
- 22.Yiannopoulos YD, Chryssikos GD, Kamitsos EI. Structure and properties of alkaline earth borate glasses. Phys Chem Glasses. 2001;42(3):164–72.Google Scholar