In situ TEM study on electron irradiation effects in SiO 2 –Na 2 O–B 2 O 3 glasses
Source abstract
Abstract
Abstract In situ transmission electron microscopy ( TEM ) was used to study the electron irradiation effects of SiO 2 –Na 2 O–B 2 O 3 ( SNB ) glasses. Three kinds of SNB glasses were designed and fabricated with constant K ( K = [SiO 2 ]/[B 2 O 3 ] molar ratio) and varying R ( R = [Na 2 O]/[B 2 O 3 ] molar ratio). The electron irradiation effects were found to be significantly dependent on the value of R . Gas bubbles and small particles were observed in the bright field ( BF ) images of irradiated SNB glasses with sufficient Na 2 O content. The bubbles are believed to be composed of molecular oxygen O 2 which was formed in the recombination processes of broken non‐bridging oxygen ( NBO ) structures. Irradiation‐produced small particles are suggested to be Si‐enriched phases which were formed via deconstruction of reedmergnerite groups. The different responses of these three kinds of SNB glasses agree well with their initial structural groups that are theoretically derived from the Bray's model.
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Research context
OpenAlex topics: Glass properties and applications · Nuclear materials and radiation effects · Luminescence Properties of Advanced Materials
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Affiliations
School of Nuclear Science and Technology Lanzhou University Lanzhou China
Key Laboratory of Special Function Materials and Structure Design Ministry of Education Lanzhou University Lanzhou China
Funding
National Natural Science Foundation of China
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