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Thermal Stability and Ionic Conductivity of Calcia‐Stabilized Zirconia with Alumina Addition
Author(s) -
Kim Buyoung,
Ryu Jiseung,
Jeon Seol,
Jo Seunghyeon,
Lee Heesoo,
Shin MinChul
Publication year - 2016
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12539
Subject(s) - thermal diffusivity , materials science , cubic zirconia , ionic conductivity , thermal stability , phase (matter) , monoclinic crystal system , thermal expansion , ionic bonding , thermal conductivity , analytical chemistry (journal) , chemical engineering , composite material , ion , thermodynamics , crystallography , chemistry , ceramic , crystal structure , chromatography , electrolyte , organic chemistry , physics , electrode , engineering
The thermal expansion and ionic conduction of 15 mol% CaO‐stabilized zirconia ( CSZ ) with added Al 2 O 3 were investigated. Specimens with 0.5 and 1 mol% Al 2 O 3 maintained the cubic phase, and the thermal diffusivity increased from 0.499 to 0.661 mm 2 /s with a 1 mol% addition. The addition of 5 mol% caused a decrease in the thermal diffusivity (0.609 mm 2 /s) with the formation of the monoclinic phase. The thermal expansion coefficient of the CSZ decreased, and the thermal diffusivity increased with the addition of Al 2 O 3 . The ionic conductivity was increased up to the addition of 1 mol% due to scavenging of siliceous by Al 2 O 3 , while the 5 mol% addition showed a decrease in conductivity with the formation of the intergranular phase.