In situ TEM study on electron irradiation effects in SiO2–Na2O–B2O3 glasses. (9th October 2018)

• Record Type: Journal Article
• Authors: Duan, Bing‐Huang; Chen, Liang; Lv, Peng; Du, Xin; Zhang, Li‐Ming; Wang, Tie‐Shan
• Is Part Of: International journal of applied glass science. Volume 10:Number 2(2019)
• Page Start: 220
• Page End: 227
• Publication Date: 2018-10-09
• Subjects: electron irradiation -- in situ transmission electron microscopy -- oxygen bubble -- Si‐enriched phase -- SNB glass; Glass -- Periodicals; Glass manufacture -- Periodicals; 666.1
• DOI: 10.1111/ijag.12975
• Languages: English
• ISSNs: 2041-1286

Abstract

Abstract: In situ transmission electron microscopy (TEM) was used to study the electron irradiation effects of SiO2 –Na2 O–B2 O3 (SNB) glasses. Three kinds of SNB glasses were designed and fabricated with constant K ( K = [SiO2 ]/[B2 O3 ] molar ratio) and varying R ( R = [Na2 O]/[B2 O3 ] 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 Na2 O content. The bubbles are believed to be composed of molecular oxygen O2 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.