本文首次用高压手段合成出La_(1-x)Sr_xCoO_3(x=0.1、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2.6GPa/1050℃/40min。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。 In this paper, the series of La_ (1-x) Sr_xCoO_3 (x = 0.1,0.2,0.3,0.4,0.6,0.8 and 1.0) compounds were synthesized by high pressure for the first time. The optimum synthesis conditions were 2.6GPa / 1050 ℃ / 40min. Through the discussion of the degree of phase transition and distortion, the study of oxygen vacancies and the discussion of valence changes, the conclusion that high pressure can reduce the amount of distortion, increase oxygen vacancies and cause some low valence Co ions is obtained. Also discussed the above factors on the conductivity and catalytic performance and so on.