Characterization of ultrafine La x Sr1−x MnO3 powder prepared by spray pyrolysis |
| |
Authors: | B. Zhao R. Zhang L Lu H. Xie |
| |
Affiliation: | (1) Academia Sinica, 100080 Beijing, China |
| |
Abstract: | The characterization of La x Sr1−x MnO3 powders produced by spray pyrolysis using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observation, specific surface area (Brunauer-Emett-Teller), and particle size distribution measurements shows that the resultant large particles are loose agglomerates consisting of many small particles. However, the sintered tiny particles can form hard agglomerates, and the particle size increases remarkably. The structures of the powders before and after sintering were identified by x-ray diffraction (XRD). The study of the electrical property of the powder shows that the powder is a metallic conductor. In a reducing atmosphere, the powder can be decomposed. When the powder is cofired with yttria-stabilized zirconia 5% (YSZ) powder at 1200 °C for 5 h, no new phase is produced, and the powder remains a single provskite hexagonal-rhombohedral structure. |
| |
Keywords: | spray pyrolysis LaxSr1− rMnO3 powder properties yttria-stabilized zirconia |
本文献已被 SpringerLink 等数据库收录! |
|