| 类鱼骨结构CoFe2O4纳米纤维的制备与性能 |
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| 引用本文： | 朱正旺,冯锐,柳扬,张扬,谢文翰,董丽杰. 类鱼骨结构CoFe2O4纳米纤维的制备与性能[J]. 无机材料学报, 2020, 35(9): 1011-1016. DOI: 10.15541/jim20190581 |
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| 作者姓名： | 朱正旺 冯锐 柳扬 张扬 谢文翰 董丽杰 |
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| 作者单位： | 武汉理工大学 材料复合新技术国家重点实验室, 智能材料与器件研究中心, 武汉 430070 |
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| 基金项目： | 国家自然科学基金(51773163) |
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| 摘 要： | 采用静电纺丝与高温煅烧相结合的方法, 以聚乙烯吡咯烷酮(PVP)、九水合硝酸铁(Fe(NO3)3·9H2O)和六水合硝酸钴(Co(NO3)2·6H2O)为原料, 制备出了类鱼骨结构的CoFe2O4纳米纤维, 并研究了煅烧温度对CoFe2O4纳米纤维形貌、磁性能以及微波吸收性能的影响。结果表明: 随着煅烧温度的升高, CoFe2O4纤维的结晶度和晶粒尺寸逐渐增大, 纳米纤维的表面形貌由光滑发展为粗糙多孔, 煅烧温度超过800 ℃时, 纳米纤维呈现类鱼骨结构; 随着煅烧温度增加纤维直径逐渐减小, 900 ℃煅烧的纤维平均直径为80.3 nm。所制备的纳米纤维经振动样品磁强计(VSM)测试结果表明, 饱和磁化强度(Ms)随着煅烧温度的升高而增加, 在900 ℃煅烧条件下纤维的Ms达87.13 A·m2/kg。矢量网络分析仪测试结果表明, 不同煅烧温度下纤维的微波吸收性能差异明显, 800 ℃下煅烧的纤维具有最佳的吸波性能。CoFe2O4纳米纤维通过磁滞损耗和涡流损耗机制吸收电磁波, 煅烧产生的孔洞和类鱼骨形貌有利于电磁波在孔道表面多次反射从而增加反射损耗。
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| 关 键 词： | 静电纺丝 CoFe2O4 纳米纤维 磁性能 微波吸收 |
| 收稿时间： | 2019-11-14 |
| 修稿时间： | 2020-01-09 |
Preparation and Property of CoFe2O4 Nanofibers with Fishbone-like Structure |
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| ZHU Zhengwang,FENG Rui,LIU Yang,ZHANG Yang,XIE Wenhan,DONG Lijie. Preparation and Property of CoFe2O4 Nanofibers with Fishbone-like Structure[J]. Journal of Inorganic Materials, 2020, 35(9): 1011-1016. DOI: 10.15541/jim20190581 |
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| Authors: | ZHU Zhengwang FENG Rui LIU Yang ZHANG Yang XIE Wenhan DONG Lijie |
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| Affiliation: | State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | CoFe2O4 nanofibers with fishbone-like structure were prepared by a electrospinning method followed with high temperature calcination, using polyvinylpyrrolidone (PVP), iron nitrate nonahydrate (Fe(NO3)3·9H2O) and cobalt nitrate hexahydrate (Co(NO3)2·6H2O) as raw materials. Results show that the crystallinity and grain size of nanofibers become larger with increasing calcination temperature. Meanwhile, the surface morphology of CoFe2O4 nanofibers changes from smooth to rough and porous. The morphology of CoFe2O4 nanofibers exhibits a fishbone-like structure with calcination temperature exceeding 800 ℃. The diameter of the fiber is gradually decreased with the increase of calcination temperature, and the average diameter of CoFe2O4 nanofibers calcined at 900 ℃ reaches 80.3 nm. By vibration sample magnetometer (VSM) test, the saturation magnetization (Ms) of CoFe2O4 nanofibers increases with the increase of calcination temperature, and the Ms of CoFe2O4 nanofibers calcined at 900 ℃ is 87.13 A·m2/kg. In a result of vector network analyzer (VNA) analysis, the microwave absorption performance is significantly different with calcination temperature changing. Among them the fibers calcined at 800 ℃ have the highest wave absorption ability. The microwave absorption mechanism of CoFe2O4 nanofibers mainly includes hysteresis loss and eddy current loss. The morphology of porous and fishbone-like generated by calcination can increase the reflection loss, for the reason that this morphology is beneficial for microwave reflection multiple times on the fiber surface. |
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| Keywords: | electrospinning CoFe2O4 nanofibers magnetic performance microwave absorption |
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