Sinterability, Mechanical, and Electrical Properties of Al2O3/8YSZ Nanocomposites Prepared by Ultrasonic Spray Pyrolysis

Authors: Yang, Jae-Kyo; Shim, Kwang-Bo; Kim, Hee-Taik; Choa, Yong-Ho

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 11, November 2006 , pp. 3404-3407(4)

Publisher: American Scientific Publishers

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Abstract:

Al2O3 nanoparticles added the YSZ for improving the mechanical property and the ionic conductivity. Al2O3/YSZ nanocomposites were prepared by ultrasonic spray pyrolysis and PECS process. The relative density of the Al2O3/YSZ nanocomposites was fully densified at a sintering temperature of 1100°C. The grain size for 5 vol.% Al2O3/YSZ was less than 100 nm. The fracture toughness and total ionic conductivity of Al2O3/YSZ nanocomposites were improved compared with Al2O3/YSZ nanocomposites by conventional process, due to homogeneous dispersion and uniform particle size of added Al2O3.

Keywords: SOFC ELECTROLYTE; AL2O3/YSZ; NANOCOMPOSITE; IONIC CONDUCTIVITY; MECHANICAL PROPERTY

Document Type: Research article

DOI: 10.1166/jnn.2006.021

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