Oxygen Tracer Diffusion in BaTiO3 Ceramics - Effect of Zr Impurity from Planetary Ball Milling

Ken Watanabe; I. Sakaguchi; S. Hishita; H. Haneda; N. Ohashi

doi:10.4028/www.scientific.net/KEM.566.262

Paper Titles

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Oxygen Diffusion in SrTiO₃ Thin Films - An Attempt to Measure Oxygen Diffusivity at Relatively Low Temperature
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Oxygen Tracer Diffusion in BaTiO₃ Ceramics - Effect of Zr Impurity from Planetary Ball Milling
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Oxygen Tracer Diffusion in BaTiO₃ Ceramics - Effect of Zr Impurity from Planetary Ball Milling

Abstract:

We investigated the effect of Zr impurities on the oxygen diffusion pathway in BaTiO₃ ceramics by using an ion-imaging technique. Zr impurities were introduced into BaTiO₃ ceramics by a planetary ball milling process. The oxygen tracer diffused quickly from the surface up to the grain boundary and then appeared as discontinuous steps at the grain boundary. The results indicate that the grain boundary acted as a blocking layer against oxygen diffusion. The blocking for oxygen diffusion at the grain boundary is thought to originate during the formation and distribution of complex defects between the charged oxygen vacancies and the Ba vacancies near the grain boundary.

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Key Engineering Materials (Volume 566)

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262-265

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https://doi.org/10.4028/www.scientific.net/KEM.566.262

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Online since:

July 2013

Authors:

Ken Watanabe, I. Sakaguchi, S. Hishita, H. Haneda, N. Ohashi

Keywords:

BaTiO₃, Oxygen Tracer Diffusion, SIMS

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