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Effect of Alumina on Sintering Behavior and Electrical Conductivity of High‐Purity Yttria‐Stabilized Zirconia
Author(s) -
Mori Masashi,
Yoshikawa Masahiro,
Itoh Hibiki,
Abe Toshio
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb07124.x
Subject(s) - sintering , yttria stabilized zirconia , materials science , electrical resistivity and conductivity , cubic zirconia , relative density , conductivity , analytical chemistry (journal) , mineralogy , chemical engineering , composite material , ceramic , chemistry , electrical engineering , chromatography , engineering
The sintering behavior and electrical conductivity of high‐purity 8‐mol% Y 2 O 3 ‐stabilized ZrO 2 (8YSZ) with Al 2 O 3 additions were investigated. The addition of 1 wt% AI 2 O 3 to 8YSZ provided dense, sintered samples with 9.1% relative density at 1400°C without a holding time. Addition of 1 wt% SiO 2 enhanced the sinterability of 8YSZ. Na 2 O addition of 0.1 wt% remarkably lowered it. Electrical conductivity at 1000°C in air increased slightly with increased Ai 2 O 3 content up to 1 wt% and then monotonously decreased. 8YSZ with 1 wt% AI 2 O 3 showed the maximum conductivity of 0.16 S/cm at 1000°C.