电解锰渣复合Fe-Mn-Cu-Co系红外辐射材料的制备及性能研究∗

摘要

Using Fe2 O3、MnO2、CuO、Co2 O3 powders as base materials,and electrolytic manganese slag as com-posite raw material.A novel infrared radiation material was developed by solid-state reaction method.The phase structure and micro-morphology of the obtained composite infrared radiation material were characterized by XRD and SEM,respectively.The effect of electrolytic manganese slag adding proportion,sintering temperature and holding time on the infrared radiation property of obtained composite materials were discussed.The results showed that as 10% adding proportion of electrolytic manganese slag sintered at 1 150,1 210,1 270 ℃ for 2 h, the emissivities of the obtained composite materials were 0.874,0.904,0.911,respectively.The emissivity was 0.924 with the optimum condition for the preparation was sintered at 1 270 ℃ for 3 h.With the increase of the added proportion of manganese slag,the emissivities of samples were declined;however,the emissivity was still 0.89 as the 30% added proportion of manganese slag.The key factors in obtaining high emissivity compos-ite materials were generated and well crystal morphology of CoMn2 O4 , MnFe2 O4 spinel structure and Mn(CuMn)O4 inverse spinel structure.%以 Fe2 O3、MnO2、CuO、Co2 O3系过渡金属氧化物为基料,分别添加不同比例的电解锰渣配料混匀后,经高温烧结制备复合红外辐射材料.通过XRD、SEM对制备的电解锰渣复合红外辐射材料的物相结构和微观形貌进行表征,探讨了电解锰渣添加比例、烧结温度和保温时间对复合红外辐射材料的常温全波段法向红外发射率的影响.研究结果表明,电解锰渣添加量为10％的样品,经1150,1210和1270℃保温2 h 获得的发射率分别为0．874,0．904和0．911；其最佳的制备条件为1270℃烧结,保温时间3 h,获得的发射率为0．924；随着电解锰渣添加量的增加,样品发射率呈下降趋势,但电解锰渣添加量为30％时,其发射率仍有0．89.尖晶石结构CoMn2 O4、MnFe2 O4和反尖晶石结构Mn(CuMn)O4的生成,良好的结晶形态是复合材料获得高发射率的关键.