CHARACTERIZATION OF ULTRAFINE LAXSR1-XMNO3 POWDER PREPARED BY SPRAY-PYROLYSIS

The characterization of LaxSr1-xMnO3 powders produced by spray pyrolys is using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observation, specific surface area (Brunauer-Emett-Te ller), and particle size distribution measurements shows that the resu ltant large particles are loose agglomerates consisting of many small particles, However, the sintered tiny particles can form hard agglomer ates, and the particle size increases remarkably, The structures of th e powders before and after sintering were identified by x-ray diffract ion (XRD), The study of the electrical property of the powder shows th at the powder is a metallic conductor, In a reducing atmosphere, the p owder can be decomposed, When the powder is cofired with yttria-stabil ized zirconia 5% (YSZ) powder at 1200 OC for 5 h, no new phase is prod uced, and the powder remains a single provskite hexagonal-rhombodehral structure.