2011 年 21 巻 2 号 p. 96-99
Ionic diffusion paths are important for the ion-diffusion mechanism in the ionic conducting ceramic materials. Here we present a brief review on the ionic diffusion paths in some ionic conducting ceramic materials. In the fluorite-structured ionic conducting ceramics such as bismuth oxide-based materials, a similar curved diffusion pathway is observed along the ＜100＞ directions. In the ionic conductors with the cubic ABO3 perovskite-type structure such as (La0.8Sr0.2)(Ga0.8Mg0.15Co0.05)O3-δ, the mobile ions diffuse along a curved line keeping the interatomic distance between the B cation and O2- anion to some degree. The structure and diffusion path of K2NiF4-type (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ and apatite-type La9.69(Si5.70Mg0.30)O26.24 are also presented.
