The Oxygen Permeation Properties of Nanocrystalline CeO[sub 2] Thin Films | Zendy

Kyle S. Brinkman | Zendy; Hitoshi Takamura | Zendy; Harry L. Tuller | Zendy; Takashi Iijima | Zendy

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The Oxygen Permeation Properties of Nanocrystalline CeO[sub 2] Thin Films

Author(s) -

Kyle S. Brinkman,

Hitoshi Takamura,

Harry L. Tuller,

Takashi Iijima

Publication year - 2010

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1.3503519

Subject(s) - nanocrystalline material , materials science , oxygen , partial pressure , grain size , cerium oxide , chemical engineering , thin film , sintering , permeation , oxygen permeability , membrane , ionic bonding , oxide , analytical chemistry (journal) , nanotechnology , composite material , metallurgy , chemistry , ion , chromatography , biochemistry , organic chemistry , engineering

The measurement of oxygen flux across nanocrystalline CeO{sub 2} cerium oxide thin films at intermediate temperature (650 to 800 C) is presented. Porous ceria support substrates were fabricated by sintering with carbon additions. The final dense film was deposited from an optimized sol-gel solution resulting in a mean grain size of 50 nm which displayed oxygen flux values of up to 0.014 {micro}mol/cm{sup 2}s over the oxygen partial pressure range from air to helium gas used in the measurement at 800 C. The oxygen flux characteristics confirm mixed ionic and electronic conductivity in nanocrystalline ceria films and demonstrate the role of size dependent materials properties as a design parameter in functional membranes for oxygen separation.

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