Particle Size Analysis of α-Fe_2O_3 Powder with Computer Image Processing System and SEM
Chen Guanqun(The Analysis and Testing Center, Sichuan Normal University,Chengdu 610066)
The CO absorption capacity of α-Fe_2O_3 powder doped by Sn is dependent on its size. In present paper the paticle sizes of α-Fe_2O_3 was determined by using SEM coupled with CIPS (Computer Image Processing System), the preparation method of the α-Fe_2O_3 sample and the analysis procedure of the particle size were also discussed. According to the above analysis results, the ideal size of α-Fe_2O_3 gas sensitive materials can be evaluated.