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Diffusion of Tl Ions into Glass Treated by Molten Salt Ion Exchange and Hydrogen Reduction

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Title: Diffusion of Tl Ions into Glass Treated by Molten Salt Ion Exchange and Hydrogen Reduction
Authors: Ueda, Mikito Browse this author →KAKEN DB
Matsunaga, Hajime Browse this author
Ohtsuka, Toshiaki Browse this author
Yamashita, Toshiharu Browse this author
Keywords: ion exchange
molten salt
Issue Date: 1-Mar-2012
Publisher: The Japan Institute of Metals
Volume: 53
Issue: 3
Start Page: 575
End Page: 577
Publisher DOI: 10.2320/matertrans.M2011343
Abstract: To investigate the diffusion behavior of Tl ions, glass was immersed in TlNO3–KNO3 molten salt at 753 K for various lengths of time. The Tl ions embedded in the glass were then reduced to metallic Tl nano-particles by hydrogen at 803 K for 1 h. The depth of the ion exchange layer down to about 140 µm in the glass was found to be proportional to a square root of the length of immersion time. It was suggested that the ion exchange process is controlled by the diffusion of Tl ions from the surface to the inside. Reduction of Tl ions to metallic Tl with the hydrogen gas occurred only at the surface down to 4 µm. The concentration profile of the metallic Tl is discussed by nucleation-nucleus growth and the diffusion of Tl ions from deeper areas.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 上田 幹人

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