Grain boundaries in BaTiO3 with a small cation nonstoichiometry

T. Yamamoto, Y. Ikuhara, K. Hayashi, T. Sakuma

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Grain boundary structure in BaTiO3 doped with a small amount of dopants was examined. It was found that grain growth behavior was very sensitive to the substituting sites of dopants, i.e., A- or B-site in a perovskite structure ABO3. Abnormal grain growth takes place in B-site type dopant excess BaTiO3 while normal grain growth occurs in A-site type dopant excess BaTiO3. High-resolution electron microscopy (HRTEM) study associated with electron energy-loss spectroscopy (EELS) revealed that the grain boundaries were facetted with {210} type habits and extra Ti-O2 bonds were formed along the facetted grain boundaries in the compounds doped with B-site type dopants. Controlling the doping ratio of A- and B-site type dopants severely, coarse-grained sinters whose grain size was about 1 mm could be obtained.

    Original languageEnglish
    Pages (from-to)113-116
    Number of pages4
    JournalKey Engineering Materials
    Volume169
    Publication statusPublished - 1999 Jan 1

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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    Yamamoto, T., Ikuhara, Y., Hayashi, K., & Sakuma, T. (1999). Grain boundaries in BaTiO3 with a small cation nonstoichiometry. Key Engineering Materials, 169, 113-116.