Oxygen diffusion in the fluorite-related phases of Y2O3Ta2O5 and Ho2O3Ta2O5 systems

Yasuro Ikuma; Yoshihide Tsubaki; Yuuji Nakao; Yoshiyuki Yokogawa; Masahiro Yoshimura

doi:10.1016/0167-2738(90)90335-O

Oxygen diffusion in the fluorite-related phases of Y₂O₃Ta₂O₅ and Ho₂O₃Ta₂O₅ systems

Yasuro Ikuma, Yoshihide Tsubaki, Yuuji Nakao, Yoshiyuki Yokogawa, Masahiro Yoshimura

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Using ¹⁸O as a tracer, isotope exchange reaction was performed to determine the oxygen diffusion coefficients of Y_0.8Ta_0.2O_1.7, Y₃TaO₇ and Ho₃TaO₇ over the temperature range 550-800°C. The diffusion coefficient in Y_0.8Ta_0.2O_1.7 was comparable to that in Ca-stabilized ZrO₂. However, the diffusion coefficient in Y₃TaO₇ and Ho₃TaO₇ was several orders of magnitude lower than that in Y_0.8Ta_0.2O_1.7 and was in the same order as the data in Y₂O₃. These results were discussed in terms of crystal structures of these compounds.

Original language	English
Pages (from-to)	258-261
Number of pages	4
Journal	Solid State Ionics
Volume	40-41
Issue number	PART 1
DOIs	https://doi.org/10.1016/0167-2738(90)90335-O
Publication status	Published - 1990 Aug

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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@article{083a83e6323141628940d4dbe88d4b09,

title = "Oxygen diffusion in the fluorite-related phases of Y2O3Ta2O5 and Ho2O3Ta2O5 systems",

abstract = "Using 18O as a tracer, isotope exchange reaction was performed to determine the oxygen diffusion coefficients of Y0.8Ta0.2O1.7, Y3TaO7 and Ho3TaO7 over the temperature range 550-800°C. The diffusion coefficient in Y0.8Ta0.2O1.7 was comparable to that in Ca-stabilized ZrO2. However, the diffusion coefficient in Y3TaO7 and Ho3TaO7 was several orders of magnitude lower than that in Y0.8Ta0.2O1.7 and was in the same order as the data in Y2O3. These results were discussed in terms of crystal structures of these compounds.",

author = "Yasuro Ikuma and Yoshihide Tsubaki and Yuuji Nakao and Yoshiyuki Yokogawa and Masahiro Yoshimura",

year = "1990",

month = aug,

doi = "10.1016/0167-2738(90)90335-O",

language = "English",

volume = "40-41",

pages = "258--261",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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T1 - Oxygen diffusion in the fluorite-related phases of Y2O3Ta2O5 and Ho2O3Ta2O5 systems

AU - Ikuma, Yasuro

AU - Tsubaki, Yoshihide

AU - Nakao, Yuuji

AU - Yokogawa, Yoshiyuki

AU - Yoshimura, Masahiro

PY - 1990/8

Y1 - 1990/8

N2 - Using 18O as a tracer, isotope exchange reaction was performed to determine the oxygen diffusion coefficients of Y0.8Ta0.2O1.7, Y3TaO7 and Ho3TaO7 over the temperature range 550-800°C. The diffusion coefficient in Y0.8Ta0.2O1.7 was comparable to that in Ca-stabilized ZrO2. However, the diffusion coefficient in Y3TaO7 and Ho3TaO7 was several orders of magnitude lower than that in Y0.8Ta0.2O1.7 and was in the same order as the data in Y2O3. These results were discussed in terms of crystal structures of these compounds.

AB - Using 18O as a tracer, isotope exchange reaction was performed to determine the oxygen diffusion coefficients of Y0.8Ta0.2O1.7, Y3TaO7 and Ho3TaO7 over the temperature range 550-800°C. The diffusion coefficient in Y0.8Ta0.2O1.7 was comparable to that in Ca-stabilized ZrO2. However, the diffusion coefficient in Y3TaO7 and Ho3TaO7 was several orders of magnitude lower than that in Y0.8Ta0.2O1.7 and was in the same order as the data in Y2O3. These results were discussed in terms of crystal structures of these compounds.

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