水热法合成镍钴铁氧体纳米粉体工艺条件的研究

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英文篇名：Study on technological conditions for nickel-cobalt ferritesnanopowders by hydrothermal method 作者：李俊燕 ; 刘泽林 ; 王迁 ; 张小苗 英文作者：LI Junyan;LIU Zelin;WANG Qian;ZHANG Xiaomiao;Key Laboratory of Civil and Military Materials,Weinan Teachers University; 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 英文关键词：nickel-cobalt ferrites;;hydrothermal method;;processing conditions;;microwave absorbing material;;nanometer particle;;pH value 中文刊名：DZAL 英文刊名：Electronic Components and Materials 机构：渭南师范学院军民两用材料重点实验室; 出版日期：2019-05-17 12:32 出版单位：电子元件与材料 年：2019 期：v.38;No.327 基金：国家自然科学基金(21503150);; 渭南师范学院人才项目(18ZRRC09) 语种：中文; 页：DZAL201905006 页数：5 CN：05 ISSN：51-1241/TN 分类号：32-35+48

摘要

采用水热法合成Ni_(0.5)Co_(0.5)Fe_2O_4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10 h工艺条件下制得的Ni_(0.5)Co_(0.5)Fe_2O_4吸波性能最好,在14.2 GHz处最大反射损耗达到-24.4 dB。
        Ni_(0.5)Co_(0.5)Fe_2O_4 nanopowders were synthesized by hydrothermal method.The effects of the processing conditions on the structure and properties of Ni_(0.5)Co_(0.5)Fe_2O_4 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 Ni_(0.5)Co_(0.5)Fe_2O_4 has the best microwave absorbing property.The maximum reflection loss at 14.2 GHz reaches-24.4 dB.

引文

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