Properties of La0.8Sr0.2Ga0.8Mg 0.2O2.8 electrolyte formed from the nano-sized powders prepared by spray pyrolysis

Abstract

The La0.8Sr0.2Ga0.8Mg0.2O 2.8 (LSGM) precursor powders with large size, hollow and thin wall structure are prepared by spray pyrolysis from the spray solution with ethylenediaminetetraacetic acid (EDTA). The precursor powders turned into the nanosized powders after post-treatment and grinding processes. The pellets formed from the powders obtained from the spray solution with EDTA had pure LSGM phase, clean surface and dense structure with small pores after sintering at 1300°C. On the other hand, the LSGM pellet formed from the powders obtained from the spray solution without EDTA had small impurity phase, porous structure and rough surface. The conductivity of the LSGM electrolyte was 0.006 S/cm at a measurement temperature of 600°C. © 2011 The Ceramic Society of Japan. All rights reserved.