Reactivity with alkali carbonates of a newly developed oxide ionic conductor, Nd9.83(SiO4)4.5(AlO 4)1.5O2 with apatite-type structure

Abstract

The reactivity of a newly developed oxygen ionic conductor, Nd 9, 83(SiO4)4.5(A1O4) 1.5O2, with alkali carbonates was examined in air and CO2. The reactivity of the developed ionic conductor was substantially lower than that of ZrO2, 3YSZ and 8YSZ in air and also in CO2. It is concluded that this newly developed oxide is more tolerant to the alkali contamination and is applicable as a potentiometric oxygen concentration gas sensor. © 2009 The Ceramic Society of Japan, All rights reserved.