熔盐法制备CuFeMnO_4光吸热材料的研究

Study on CuFeMnO_4 Light Absorbing Materials Prepared by Molten Salt Method

以KOH、KNO3为熔盐,Cu(NO3)2·3H2O、Fe(NO3)3·9H2O、50wt%Mn(NO3)2为原料,研究了金属离子配比及合成温度对熔盐法制备CuFeMnO4粉体的影响,采用XRD和FESEM进行物相及微观形貌的测试分析,利用自行设计测试装置对CuFeMnO4涂层的吸热性能进行评价。研究结果表明,CuFeMnO4粉体主晶相为尖晶石型,当金属离子配比为Fe3+∶Cu2+∶Mn2+=1∶0.5∶1时,可有效地抑制杂相的生成;合成温度为700℃时,晶体成核均匀,晶粒尺寸较小。该粉体制成涂料涂覆在铝板上,可使铝板的吸热温度提高22℃,增强了吸热效果。

Cu Fe Mn O4 powders were prepared by a novel molten salt method,using KOH and KNO3 as molten salt,Cu（ NO3）2·3H2O,Fe（ NO3）3·9H2O and 50wt% Mn（ NO3）2as raw materials. The effect of metal ion proportion and synthesis temperature on Cu Fe Mn O4 powders were investigated. Phase structure and crystal morphology were characterized by XRD and FESEM,respectively. For evaluating the light-absorbing property,Cu Fe Mn O4 coating formed on the Al substrate was tested by self-design device. The results show that the Cu Fe Mn O4 prepared by the molten salt method is spinel. When metal ion proportion（ Fe^3 ＋∶ Cu^2 ＋∶ Mn^2 ＋） is 1∶ 0. 5∶ 1,it contributes to inhibit the growth of impure phase,and the grain size obtained at 700 ℃ is small and homogeneous. Subsequently,the existing of Cu Fe Mn O4 coating on the Al substrate can raise the absorbing temperature by 22 ℃.