Oxygen Diffusion Phenomena and Hydrogen Incorporation in Reducing BaTiO3 Ceramics Doped with Ho below Solubility Limit
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概要
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Oxygen diffusion phenomena in BaTiO3 ceramics doped with Ho of 5.2 \times 10^{18}/cm3 were studied in order to reveal the effect of reduction thermal annealing. The samples were reduced at 850 °C in a 3% H2--Ar atmosphere before the oxygen diffusion experiments. The oxygen diffusion was carried out in the temperature range of 700--800 °C. The measurement of diffusion profiles and ion images revealed the oxygen defect distribution caused by the annealing. The results show that the grain boundary acts as a layer blocking oxygen diffusion when the diffusion temperature is below the reduction temperature of 850 °C.
- 2012-10-25
著者
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WATANABE Ken
International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitec
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HANEDA Hajime
Optical and Electronic Materials Unit, National Institute for Materials Science
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Hishita Shunichi
Optical And Electronic Materials Unit National Institute For Materials Science
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Sakaguchi Isao
Optical And Electronic Materials Unit National Institute For Materials Science
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Ohashi Naoki
Optical and Electronic Materials Unit, National Institute for Materials Science
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Haneda Hajime
Optical and Electronic Materials Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Ohashi Naoki
Optical and Electronic Materials Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Sakaguchi Isao
Optical and Electronic Materials Unit, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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