The Preparation of Pervoskite Oxide Powders adopted in ITSOFC via Inductively Coupled Plasma Technique

摘要

The Sm_(0.5)Sr_(0.5)CoO_(3-δ) (SSC), La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3-δ) (LSCM) and La_(0.8)Sr_(0.2)Ga_(0.8)Mg_(0.2)O_(3-δ) (LSGM) perovskite oxide powders commonly used as electrode and/or electrolyte materials of intermediate temperature solid oxide fuel cells (ITSOFCs) are successfully synthesized by inductively coupled plasma (ICP) synthesis technique in this study. These powders synthesized from the well chelating precursor solutions at the torch powers from 16.2 to 22.2 kW and calcined at the temperatures from 900 to 1400°C are in a highly pure phase. The XRD results of these calcined powders indicate the S/P ratios (the ratio of the mostly intense diffraction intensity of secondary phase to that of primary phase) are all less than 3%. The morphology and particle sizes of synthesized oxide powders were observed by electron microscopy. The results show that the primary particle sizes of as-synthesied powders are all about 5-50 nm.