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Observation of Intergranular Films in BaB2O4-added BaTiO3 Ceramics

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Abstract

Distribution characteristics of boundary phase in BaB2O4 added BaTiO3 ceramics were investigated with a focus on the curvature difference of solid–liquid interfaces at two-grain and triple junctions. High-resolution transmission electron microscopy revealed that the triple junction of solid grains showed the positive curvature of solid–liquid interface and consisted of the mixture of liquid phase and crystallized BaB2O4 phase. On the other hand, flat amorphous thin film of 2.5-nm thickness was observed at the two-grain junction. This kind of boundary phase distribution characteristic was explained by the solubility difference between two kinds of junctions of solid grains that had different curvature of solid–liquid interfaces.

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Authors and Affiliations

  1. Department of Inorganic Materials Engineering, Kyungpook National University, Taegu, 702-701, Korea

    Joon-Hyung Lee, Jeong-Joo Kim & Sang-Hee Cho

  2. Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA

    Haifeng Wang

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  1. Joon-Hyung Lee
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  2. Jeong-Joo Kim
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  3. Haifeng Wang
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  4. Sang-Hee Cho
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Correspondence to Joon-Hyung Lee.

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Lee, JH., Kim, JJ., Wang, H. et al. Observation of Intergranular Films in BaB2O4-added BaTiO3 Ceramics. Journal of Materials Research 15, 1600–1604 (2000). https://doi.org/10.1557/JMR.2000.0229

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