Synthesis and Electromagnetic and Microwave Absorption Properties of Monodispersive Fe3O4/α-Fe2O3 Composites
Synthesis and Electromagnetic and Microwave Absorption Properties of Monodispersive Fe3O4/α-Fe2O3 Composites
复制标题
单分散Fe3O4/α-Fe2O3复合材料的合成及其电磁和微波吸收性能
DOI：
10.1021/acsanm.8b00703
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发表时间：
2018-08-01
影响因子：
5.9
通讯作者：
Liu, Jiping
中科院分区：
文献类型：
--
作者：
Ji, Jindou;Huang, Yue;Liu, Jiping
采用一步法合成了Fe 3 O 4/α-Fe 2 O3复合材料。通过调节前驱体溶液中Fe 3+（FeCl 3中心点6 H（2）O）的浓度，有效地改变了材料的组成和性能。与单相Fe 3 O 4和Fe 2 O3相比，Fe 3 O 4/α-Fe 2 O3复合材料的有效吸波能力在1-18 GHz范围内得到了显著提高，这可能是由于Fe 3 O 4/α-Fe 2 O3界面处晶格位错引起的偶极极化和界面极化增强所致。在厚度为2.0 mm时，Fe_3O_4/α-Fe_2O_3复合材料的最小反射损耗（RL）为-43.1 dB，有效吸收频带为3.4 GHz（9.8-13.2 GHz）。在1.5-3.2 mm的厚度下，RL的宽度达到9.9 GHz（3.5-13.4 GHz）。结果表明，Fe_3O_4/α-Fe_2O_3复合材料具有较宽的微波吸收频带，是一种理想的微波吸收材料。
Fe3O4/alpha-Fe2O3 composites were synthesized by a one-step method. The composition and their performances were modified by adjusting the concentration of Fe3+ (FeCl3 center dot 6H(2)O) in the precursor solution, effectively. Compared with single-phase Fe3O4 and Fe2O3, the effective microwave absorbing ability of Fe3O4/alpha-Fe2O3 composites is much widened in the range 1-18 GHz, which could stem from the enhanced dipolar polarization and interfacial polarization due to lattice dislocations at the interface of Fe3O4/alpha-Fe2O3. The minimum reflection loss (RL) of Fe3O4/alpha-Fe2O3 composites reaches about -43.1 dB at a thickness of 2.0 mm, with the effective absorption band reaching 3.4 GHz (9.8-13.2 GHz). In the thickness of 1.5-3.2 mm, the width of the RL reaches 9.9 GHz (3.5-13.4 GHz). The results demonstrate that Fe3O4/alpha-Fe2O3 composites could be a candidate to be used as absorbers with the microwave absorption band much widened.