The 64th CerSJ awards for academic achievements in ceramic science and technology: Microstructural evolution by in-situ TEM observations of oxides

DOI Web Site Web Site 被引用文献1件 参考文献32件
  • NAKANO Hiromi
    Cooperative Research Facility Center, Toyohashi University of Technology

書誌事項

タイトル別名
  • Microstructural evolution by in-situ TEM observations of oxides

この論文をさがす

抄録

In-situ observations using high-temperature transmission electron microscopy (TEM) is a promising technique for obtaining new findings and developing phenomenological theory for ceramic materials at high temperatures. By observing the changes in hydrothermal BaTiO3 due to heating, we clarify the vanishing mechanism of internal pores and the mechanism of BaCO3 phase generation/vanishing at high temperatures. Through observations of the grain growth of BaTiO3 prepared by radio-frequency plasma chemical vapor deposition, we calculate the grain-boundary diffusion coefficient, which is an important parameter controlling the sinterability of ceramics. Observations of the shrinkage and disappearance of Ba5Nb4O15, as well as simulations, indicate that high energy and low diffusivity at the grain boundary make grains vanish while maintaining a truncated spherical shape. Finally, observations of the structural changes in layered perovskite BaLn2Mn2O7 (Ln = Gd, Pr, Eu) reveal a first-order phase transition that has not been previously reported.

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (32)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ