Measurement of self-diffusion coefficients in Li ionic conductors by using the short-lived radiotracer of8Li

Sun Chan Jeong, Ichiro Katayama, Hirokane Kawakami, Yutaka Watanabe, Hironobu Ishiyama, Nobuaki Imai, Yoshikazu Hirayama, Hiroari Miyatake, Masao Sataka, Satoru Okayasu, Hiroyuki Sugai, Shin Ichi Ichikawa, Katsuhisa Nishio, Shinichi Mitsuoka, Takamitsu Nakanoya, Masahito Yahagi, Takanori Hashimoto, Kazunori Takada, Mamoru Watanabe, Tomoko IshikawaAkihiro Iwase

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

For the effective use of short-lived radioactive beams, soon to be available at the Tokai Radioactive Ion Accelerator Complex, the authors have developed a radiotracer method for diffusion studies in solids. The experimental test was performed by the measurement of the diffusion coefficients of Li in a sample of the compound βLiAl using an α-emitting radiotracer of 8Li (T1/2 = 0.84 s). It was found that the time-dependent yields of the a particles from the diffusing 8Li that was initially implanted in the sample could be used as a measure of the diffusivity of the tracer in a nondestructive way. The method was applied to measure the self-diffusion coefficients of Li in βLiGa, and for investigating how the Li diffusion in the Li ionic conductors is affected by the concentration of atomic defects (i.e., the existence of the atomic vacancies of Li and the defects in Ga sites that are replaced by Li).

Original languageEnglish
Pages (from-to)472-476
Number of pages5
JournalJournal of Phase Equilibria and Diffusion
Volume26
Issue number5
DOIs
Publication statusPublished - 2005 Oct

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry

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