Effect of Doped Manganese Oxide on the Properties of Ce_0.8Gd_0.2O_2-δ Solid Electrolyte

Abstract:

The effects of Ce0.8Gd0.2O2-δ (CGO) doped manganese oxide as sintering additive on density and conductivity were studied. The experimental results indicated that relative density of CGO doped 2.0 mol% MnO1.333 (2Mn-CGO) increased within a certain temperature range because of the occurrence of viscous flow sintering, it was 89.5% at the sintering temperature of 1100 oC and higher 6.8% than that of CGO. Moreover, it can reach 91.1% for 2Mn-CGO at the sintering temperature of 1200 oC. The conductivity measured at 700 oC of 2Mn-CGO sintered at 1100 oC was 4.52×10-2 S/cm, which is higher than that of CGO. The value of 2Mn-CGO with the sintering temperature of 1200 oC was 5.24×10-2S/cm, which dropped slightly than that of CGO, this was caused by blocking of the migration of carriers.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 362-367
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.362
• Online since: December 2012
• Authors: Zhi Juan Zhang
• Keywords: Conductivity, Gadolinia-Doped Ceria, Manganese Oxide, Relative Density

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