Various perovskite compositions have been prepared through this method and their structure , electronic and magnetic properties have been studied . in this paper , la2o3 , sro2i mn , naclo4 , kmno4 were used as raw materials and were synthesized into la1 - xsrxmn03 powder by employing self - propagating high - temperature synthesis ( shs ) technology and filtration processing . in addition , the mechanism of chemical reaction and microstructure formation process of la2o3 - sro2 - mn - naclo4 - kmno4 system was studied La _ ( 1 - x ) sr _ xmno _ 3的shs合成工艺研究发现，在shs合成过程中液相量的多少和反应温度有很大的关系，通过在反应体系内加入第二相氧化剂kmno _ 4可以控制反应进程， kmno _ 4在反应中分解得到的高活性mno _ 2利于产物的生成，一定程度上避免了氧缺位和中间产物的形成。
