掺Sb的Fe(OH)_3干凝胶晶化的穆斯堡尔谱研究

Mssbauer spectral investigation on the crystallization of Sb doped Fe(OH)_3 gel

对掺杂Sb的Fe(OH)3干凝胶及α-Fe2O3晶化相进行穆斯堡尔谱研究．结 果显 示：Fe(OH)3非晶相的原子配位与Sb掺杂基本无关，其结构在晶化前随着热处理的进 行无序度增加；掺Sb干凝胶加热时晶化为α-Fe2O3和FeSbO4；部分Sb原子进入 α-Fe2O3形成固溶体．

The Sb doped Fe(OH)3 gel and α-Fe2O3 phase prepared by sol-gel me thod have been investigated with Mssbauer spectrograph. The atomic co o rdination of amorphous Fe(OH)3 is almost unaffected by the Sb doping, while it s structure tends to be more random during annealing before crystallization. Sb doped gel transform to α-Fe2O3 and FeSbO4 through crystallization af ter proper annealing, some of the Sb dopant enter the α-Fe2O3 lattice and form the solid solution.