喷射-沉淀法合成纳米晶Ni-Zn铁氧体及表征

Synthesis and characterization of nanostructured Ni-Zn ferrite by using spraying-coprecipitation method

采用喷射-沉淀法成功地制备了纳米晶Ni-Zn铁氧体粉料。通过XRD、TG．DSC、SEM、TEM和BET等测试手段分析了其微观结构和形貌．结果表明：沉淀剂种类和溶液pH值对喷射．共沉淀法制备Ni-zn铁氧体纳米粉的物相和结构有着显著影响。采用NaOH溶液为沉淀剂，pH值范围为7．0～7．5，可以获得颗粒细小均匀、形状完整的纳米晶Ni-Zn铁氧体粉料。在600℃煅烧1．5h，样品晶粒尺寸为30nm左右，平均颗粒尺寸小于100nm。

Nanostructured Ni-Zn ferrite was successfully prepared by spraying-coprecipitation method. The microstructure was investigated by using XRD, TG-DSC, SEM, TEM as well as BET. The results show that reactive precipitator and pH value have significantly effect on the phase and microstructure of nanostructured Ni-Zn ferrite. Uniform and fine nano Ni-Zn ferrite powders are obtained by using NaOH precipitator and pH value of 7.0～7.5. The grain size is about 30 nm calcined at 600℃ for 1.5h, and average particle size is below 100nm.