Electronic conductivity measurements of 5 mol% TiO2-doped YSZ by a d.c.-polarization technique

✍ Scribed by Kiyoshi Kobayashi; Yukiharu Kai; Shu Yamaguchi; Norihiko Fukatsu; Tsuyoshi Kawashima; Yoshiaki Iguchi

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 574 KB
• Volume: 93
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00534-6

✦ Synopsis

The partial conductivities of electrons and holes in yttria stabilized zirconia doped with 5 mol% of TiO, (STD-YSZ) have been measured by the d.c.-polarization method using Hcbb-Wagner's asymmetric cell. The partial conductivities of holes, wP, and electrons, rr,, were found to be proportional top::," and pi: ", respectively, except for U, in the low po, regime. The C" values in STD-YSZ were greater than those in non-doped ones reported by several investigators. In contrast, the c,, values in STD-YSZ were almost the same with those in the non-doped ones. The activation energy for c" at the fixed po, of 1.0 atm in STD-YSZ was smaller than that of the non-doped one, while that for u,, in STD-YSZ was ahnost the same.