| NZFO-PZT磁电复合纳米纤维的制备及其吸波性能 | |
| Fabrication and Microwave Absorption Properties of NZFO-PZT Magnetoelectric Composite Nanofibers | |
| 摘要: 采用静电纺丝法制备(1-x)Ni0.5Zn0.5Fe2O4-(x)Pb(Zr0.52Ti0.48)O3(简称为(1-x)NZFO-(x)PZT, x=0.1、0.2、0.3、0.4、0.5)磁电复合纳米纤维, 研究了PZT含量对复合纳米纤维结构、电磁特性及微波吸收性能的影响。所有样品均由尖晶石结构NZFO和钙钛矿结构PZT两相所组成。由于NZFO磁损耗与PZT介电损耗的协同效应及界面效应的加强, 适量PZT相的引入可改善复合纳米纤维吸波涂层的电磁阻抗匹配和衰减特性, 提高微波吸收性能。x=0.3和0.4的复合纳米纤维分别在低频和高频范围表现出最强的微波吸收能力。当涂层厚度为2.5~5.0 mm时, x=0.3样品的最小反射损耗在6.1 GHz处达-77.2 dB, 反射损耗小于-10 dB的有效吸收带宽为11.2 GHz(2.8~12.9和16.9~18 GHz);x=0.4样品的最小反射损耗位于18 GHz处为-37.6 dB, 有效吸收带宽达到12.5 GHz(3.3~12.5和14.7~18 GHz)。 | |
| 关键词: Ni-Zn铁氧体 锆钛酸铅 磁电复合纳米纤维 微波吸收性能 协同效应 | |
| 基金项目: 国家自然科学基金(No.11204108)、中国博士后科学基金(No.2013M540418)和江苏省博士后科研资助计划(No.1301055B)资助项目。 | |
| Abstract: (1-x)Ni0.5Zn0.5Fe2O4-(x)Pb(Zr0.52Ti0.48)O3 (known simply as (1-x)NZFO-(x)PZT, x=0.1, 0.2, 0.3, 0.4, and 0.5) magnetoelectric composite nanofibers have been successfully fabricated using the electrospinning method. The effects of PZT content on structures, electromagnetic characteristics and microwave absorption properties of the resultant products have been investigated in detail. It is found that all the as-prepared composites nanofibers are composed of both spinel-structured NZFO and perovskite-structured PZT phases. The appropriate incorporation of PZT phase in the composite nanofibers can improve the electromagnetic impedance matching and attenuation characteristics of the corresponding microwave absorbing coatings due to the synergistic effects between magnetic loss of NZFO and dielectric loss of PZT and the enhanced interfacial effects, and consequently boost their microwave absorption performances. The (1-x)NZFO-(x)PZT composite nanofiber/silicone microwave absorbing coatings with x=0.3 and 0.4 exhibit the strongest microwave absorption ability in the low- and high-frequency ranges, respectively. When the coating thickness is between 2.5 and 5.0 mm, the minimum reflection loss (RL) value of the x=0.3 sample is -77.2 dB at 6.1 GHz and the effective absorption bandwidth with RL below -10 dB reaches 11.2 GHz covering the 2.8~12.9 and 16.9~18 GHz frequency ranges. While for x=0.4 sample, an optimal RL value of -37.6 dB is observed at 18 GHz and the effective absorption bandwidth is up to 12.5 GHz ranging from 3.3 to 12.5 and 14.7 to 18 GHz. | |
| Keywords: Ni-Zn ferrite lead zirconate titanate magnetoelectric composite nanofiber microwave absorbing performance synergistic effect | |
| 投稿时间：2015-04-14 修订日期：2015-05-29 | |
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| 叶芹,向军,李佳乐,刘敏,徐加焕,沈湘黔.NZFO-PZT磁电复合纳米纤维的制备及其吸波性能[J].无机化学学报,2015,31(7):1296-1304. | |
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