【摘要】 以FeSO4.7H2O、MnSO4.H2O、ZnSO4.7H2O、HCl为原料,NaOH溶液为沉淀剂、H2O2为氧化剂,采用氧化-共沉淀法在液相中制备Mn-Zn铁氧体,通过傅里叶变换红外光谱仪(IR),X射线衍射仪(XRD)和振动样品磁强计(VSM)对样品进行表征,讨论了Mn-Zn铁氧体在液相中的形成机理和氧化共沉淀法制备Mn-Zn铁氧体的影响因素。结果表明:采用氧化-共沉淀法能在液相中直接制备出Mn-Zn铁氧体,溶液的浓度和pH值是形成单相Mn-Zn铁氧体的两个关键因素;溶液的浓度和pH值低时,制备出的样品中含有非晶相FeOOH且饱和磁化强度低。更多还原

【Abstract】 Mn-Zn ferrites(Mn0.5-Zn0.5RExFe2-xO4) were prepared by oxide co-precipitation method using FeSO4·7H2O、 MnSO4·H2O 、ZnSO4·7H2O and RE2O3(RE=Y、Nd、Gd、Dy)、HCl as the raw materials,sodium hydroxide solution as the precipitating agent and hydrogen peroxide as the oxidizing reagent.The samples of Mn0.5-Zn0.5Fe2O4 were characterized by FT-IR,XRD and VSM.The formation machnism of Mn-Zn ferrite and the effects of concentration of solution and pH were studied on phase and magnetic properties of the samples were determined.The current findings indicate the samples of Mn-Zn ferrite could be prepared directly in solution by oxide co-precipitation method.The concentration of solution and pH are two key factors of this method,when the concentration of solution and pH are low,the samples prepared by this method contain FeOOH and the saturation magnetization is small.The higher concentration and pH are the higher crystallinity and saturation magnetization will be achieved.更多还原