铁酸钡复合超细微粒的制备和性能研究

Preparation of Barium Ferrife and Its Characterization

以FeCl3·6H2 O、FeSO4·7H2 O和BaCl2 ·2H2 O为原料 ,采用固相反应法和微乳液 -沉淀法制备铁酸钡超细微粒。并进行了XRD、TEM、IR分析和磁化率的测定 ,结果表明 ,微粒的主要成分为α 型BaFe2 O4,平均粒径分别约为 2 38nm和 2 5 5nm ,单个微粒的粒径分别约为 3 1 4nm和2 65nm ,每个复合微粒中分别含有 72和 1 34个铁酸钡粒子 ;磁化率的大小随磁场强度、灼烧温度的增加而增大。

Utrafine partical the BaFe 2O 4 was prepared by a solid phase transformation and micro-emulsion precipitating method respectively.In this method,FeCl 36H 2O?FeSO 47H 2O and BaCl 22H 2O were used as raw materials.Testing of The XRD,TEM,IR and susceptibility results showed that average size about 238nm and 255nm respectively,single partivle size ahout 3 14nm and 2 65nm,every composite particle have 72 and 134 BaFe 2O 4 partivles.The susceptibility are increase with intensity of magnetic field and temperature s increase.