依据固相反应动力学模型,研究了纳米晶Dy_(1-x)Sr_xCoO_(3-y)的固相反应过程.结果表明,纳米晶稀土复合氧化物Dy_(1-x)Sr_xCoO_(3-y)的固相反应是扩散控制过程,反应活化能为120kJ·mol~(-1),从823～973K温度,其反应速率常数在0.302×10~(-6)～4.50×10~(-6)之间.通过固相反应在700℃获得了粒径在5～15nm的纳米晶粉体,这源于纳米晶的表面和界面效应. The solid-state reaction of Dy_ (1-x) Sr_xCoO_ (3-y) nanocrystals was studied based on the solid state reaction kinetics model. The results show that the solid state reaction of Dy_ (1-x) Sr_xCoO_ (3-y) ) Is a diffusion controlled process. The reaction activation energy is 120 kJ · mol -1. The reaction rate constant is in the range of 0.302 × 10 -6 to 4.50 × 10 -6 ) .The nanocrystalline powders with particle size of 5 ~ 15nm were obtained by solid-state reaction at 700 ℃, which is due to the surface and interface effect of nanocrystals.