Effect of Alumina on Sintering Behavior and Electrical Conductivity of High-Purity Yttria-Stabilized Zirconia |
| |
| Authors: | Masashi Mori Masahiro Yoshikawa Hibiki Itoh Toshio Abe |
| |
| Affiliation: | Chemical Power Generation Group, Chemical Energy Engineering Department, Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240–01, Japan |
| |
| Abstract: | The sintering behavior and electrical conductivity of high-purity 8-mol% Y2O3-stabilized ZrO2 (8YSZ) with Al2O3 additions were investigated. The addition of 1 wt% AI2O3 to 8YSZ provided dense, sintered samples with 9.1% relative density at 1400°C without a holding time. Addition of 1 wt% SiO2 enhanced the sinterability of 8YSZ. Na2O addition of 0.1 wt% remarkably lowered it. Electrical conductivity at 1000°C in air increased slightly with increased Ai2O3 content up to 1 wt% and then monotonously decreased. 8YSZ with 1 wt% AI2O3 showed the maximum conductivity of 0.16 S/cm at 1000°C. |
| |
| Keywords: | |
|
|
