-
摘要: 本文首次用高压手段合成出La1-xSrxCoO3（x=0.0、0.2、0.3、0.4、0.6、0.8和1.0）化合物系列，最佳合成条件为2.6 GPa/1 050 ℃/40 min。通过对其结构相变与畸变程度、氧缺位问题的研究以及价态变化的讨论，得出了高压减小畸变量、增加氧缺位数并导致一部分低价态Co离子出现的结论。还讨论了上述诸因素对电导率和催化性能等的影响。
-
关键词:
- La1-xSrxCoO3 /
- 高压合成 /
- 畸变 /
- 相变 /
- 氧缺位
Abstract: By using the high-pressure method for the first time, the series of compounds La1-xSrxCoO3 (x=0.0, 0.2, 0.3, 0.4, 0.6, 0.8 and 1.0) have been synthesized at the condition of 2.6 GPa/1 050 ℃/40 min. After the study of their structure transformation, distortions and oxygen vacancies and the discussion of Valence changes, the conclusion that high pressure decreases the oxygen vacancy and results in some Co ions in low valence state hase been obtained. The effects of the factors mentioned aboved on the properties of electric conductivity and catalysis have also been discussed.-
Key words:
- La1-xSrxCoO3 /
- high pressure synthesis /
- distortion /
- structure transformation /
- oxygen deficiency
-
Khattak C P, Wang F F Y. Handbook on the Phys. and Chem. of R. E. North-Holland Pub Comp, 1979, 3: 534. Schneider S T, Roth R S. J Res NBS, 1960, 65A: 317. Shin-ike T tt al. Mar Res Buli 14(10X 1979) 1323. Obayashi H, Kudo T. Jpn J Appl Phys, 1975, 14: 330. Obayashi H, et al. Jpn J Appl Phys, 1974, 13: 1. Jonker G H. Philips Res Rep, 1969, 24: 1. Obayashi H, Kudo T. 电气化学ぉよび工业物理学, 1976, 44(8): 503. NaKamura T, et al. Bull Chem Soc Jpn, 1982,55: 394. Voorhoeve R J H. Advanced Materials in Catalists. New York: Academic Press, 1977. -
点击查看大图
计量
- 文章访问数: 7423
- HTML全文浏览量: 317
- PDF下载量: 766
下载:
