水热法合成镍钴铁氧体纳米粉体工艺条件的研究  

Study on technological conditions for nickel-cobalt ferritesnanopowders by hydrothermal method

作　　者：李俊燕[1] 刘泽林[1] 王迁 张小苗[1] LI Junyan;LIU Zelin;WANG Qian;ZHANG Xiaomiao(Key Laboratory of Civil and Military Materials,Weinan Teachers University,Weinan 714099,Shaanxi Province,China)

机构地区：[1]渭南师范学院军民两用材料重点实验室

出　　处：《电子元件与材料》2019年第5期28-31,44,共5页Electronic Components And Materials

基　　金：国家自然科学基金(21503150);渭南师范学院人才项目(18ZRRC09)

摘　　要：采用水热法合成Ni0.5Co0.5Fe2O4纳米粉体,并借助于X射线衍射仪(XRD)、扫描电子显微镜(SEM)、矢量网络分析仪研究工艺条件(pH值、水热反应温度、水热时间)对铁氧体物相、形貌及吸波性能的影响。结果表明,pH值在8~11可生成单相的尖晶石结构。随着反应体系pH值的增加,晶粒粒径明显长大,形貌也由类球形逐渐转变为不规则的多边形结构。在pH值为10,水热反应温度180℃,水热反应时间10h工艺条件下制得的Ni0.5Co0.5Fe2O4吸波性能最好,在14.2GHz处最大反射损耗达到-24.4dB。Ni0. 5 Co0. 5 Fe2 O4 nanopowders were synthesized by hydrothermal method. The effects of the processing conditions on the structure and properties of Ni0. 5 Co0. 5 Fe2 O4 were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and network analyzer. The results indicate that single phase spinel structure is obtained when pH value is between 8 and 11. With the increase of pH value, the grain size increases while the shape transforms from spheroid to irregular polygonal structure. When the pH value is 10, the hydrothermal reaction temperature is 180 ℃, the hydrothermal reaction time is 10 h, the Ni0. 5 Co0. 5 Fe2 O4 has the best microwave absorbing property. The maximum reflection loss at 14. 2 GHz reaches -24. 4 dB.

关 键 词：钴镍铁氧体 水热法 工艺条件 吸波材料 纳米粒子 pH值 

分 类 号：TN304[电子电信—物理电子学]