Preparation and Electrocatalytic Properties of Perovskite-Type Compound Oxides La_(1-x)Sr_xCoO_3

La_(1-x)Sr_xCoO_3 compound oxide powder is prepared by sol-gel method through high temperature calcine and microwave calcine respectively. DTA/TG analyses of gel indicate that phase transformation completes basically at about 600℃ and that perovskite phase is formed. The X-ray diffraction patterns of gel calcined at 200℃ show that the powder is mainly metal oxides, and perovskite phase is not formed. The X-ray diffraction of powder calcined at high temperature and microwave in stove shows the main phase in catalyst is perovskite-type structure. According to the electrochemistry test, the catalytic properties appear to be better in the following conditions: when the powder is calcined for 9 minutes; when it is calcined at 800℃; and when it uses microwave rather than electric stove. It is also made clear that the higher the calcine temperature is, the better the crystallization becomes.