Determination of the properties of ionic vacancy by magnetic field

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Aogaki, R.^1 ; Sugiyama, A.^2,3 ; Miura, M.^4 ; Oshikiri, Y.^4 ; Miura, M.^5 ; Morimoto, R.^6 ; Mogi, I.^7 ; Takagi, S.^8 ; Yamauchi, Y.^9

Polytechnic Univ., Japan^1

Yoshino Denka Kogyo Inc., Japan^2

Waseda Univ. Res. Org. Nano and Life Innovation, Japan^3

Hokkaido Polytechnic College, Japan^4

Polytechnic Center Kimitsu, Japan^5

Saitama Industrial Technology Center, Japan^6

Tohoku Univ., Japan^7

Koriyama Technical Academy, Japan^8

National Institute for Materials Science, Japan^9

关键词: Collision radii;    Copper deposition;    Electrode reactions;    Electrolyte solutions;    Free spaces;    Nano-bubble;    Perfect gas;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012023/pdf
DOI  :  10.1088/1757-899X/424/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Ionic vacancy is, being produced as a byproduct in electrode reaction, a polarized free space of the order of 0.1 nm surrounded by oppositely charged ionic cloud. As a perfect gas in electrolyte solution, it does not interplay with other solution particles. On the other hand, magnetic field provides useful means to examine the natures of it. Using a special electrode operated in a magnetic field called cyclotron MHD electrode (CMHDE), we first determined the lifetime of vacancy in copper deposition as 1.2 sec, which is extraordinarily long in comparison with the collision interval of solution particles. Then, using kinetic theory of gas, we measured the collision radius of vacancy gas to be 0.70 nm, which was consistent with theoretical calculation 0.65 nm.