Characterization of ultrafine La{sub x}Sr{sub 1{minus}x}MnO{sub 3} powder prepared by spray pyrolysis
- Academia Sinica, Beijing (China)
As a device for generating electricity, solid oxide fuel cell (SOFC) has excellent potential advantages. La{sub x}Sr{sub 1{minus}x}MnO{sub 3} powders are widely used as air electrode materials in SOFC systems; they are an essential component part and are therefore directly related to the efficiency of the system. The characterization of La{sub x}Sr{sub 1{minus}x}MnO{sub 3} 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 1,200 C for 5 h, no new phase is produced, and the powder remains a single provskite hexagonal-rhombohedral structure.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 554088
- Journal Information:
- Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 5 Vol. 6; ISSN 1059-9495; ISSN JMEPEG
- Country of Publication:
- United States
- Language:
- English
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