Low-Temperature Preparation of La_(0.6)Sr_(0.4)Fe_(0.8)Co_(0.2)O_(3-δ) Sinterable Nanopowders by the Polymeric Organic Complex Solution Method

摘要

In this work, powders of La_(0.6)Sr_(0.4)Fe_(0.8)Co_(0.2)O_(3-δ) were prepared by the auto-combustion of ethylene glycol-metal nitrate polymerised gel precursor. This method (polymeric organic complex solution) allows decreasing the processing temperature and simplifies the whole procedure. A single phase material is obtained at 300℃ lower than that needed by conventional solid state reaction (SSR). The reduced particle size and low agglomeration increases the reactivity of powders and therefore, the sintering temperature is also reduced in 200℃ with respect to the conventional SSR method. As a consequence of that, the microstructures are controlled maintaining the grain size in an almost nanometric range.