炭化纳米Co<sub>3</sub>O<sub>4</sub>/硅藻土复合材料制备及其性能

doi:10.11868/j.issn.1001-4381.2017.000540

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摘要

利用高温热解炭化制备炭化纳米Co₃O₄与硅藻土复合材料，研究其磁性和吸波性能。采用X射线衍射、扫描电镜、透射电镜、振动样品磁强计和矢量网络分析仪等测试分析技术对复合材料进行表征。结果表明：平均粒径为50nm的超顺磁性纳米Co₃O₄粒子和无定形碳均匀分散于硅藻土表面和孔隙内，形成稳定的复合体。炭化纳米Co₃O₄/硅藻土复合具有较强的超顺磁性和吸波性能，最大反射率损失为-14.7dB， < -10dB的频率范围大约为14~18GHz，带宽为4GHz。

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	张博
	付琪智
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	陈廷芳
	孙仕勇
	蒋卉

关键词 ：纳米Co₃O₄, 硅藻土, 复合材料, 吸波性能, 炭化

Abstract：

Carbonized nano-Co₃O₄ particles and diatomite were used for preparation of the composite of carbonized nano-Co₃O₄/diatomite by pyrolysis method, the magnetic and absorption properties were studied. The composite was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometer. The results show that the superparamagnetic nano-Co₃O₄ particles with average size of 50nm and amorphous activated carbon are uniformly dispersed in the surface and pores of diatomite to form a stable composite. Carbonized nano-Co₃O₄/diatomite composite indicates high magnetic and microwave absorption performance with maximum reflection loss of -14.7dB, < -10dB frequency range about 14-18GHz and bandwidth of 4GHz.

Key words： nano-Co₃O₄ diatomite composite microwave absorption property carbonization

收稿日期: 2017-04-28 出版日期: 2019-02-21

中图分类号:	P579
	TB34

基金资助:国家自然科学基金项目(41672039);固体废物处理与资源化教育部重点实验室开放基金(09zxgk06)

通讯作者: 陈廷芳 E-mail: chentingfang@swust.edu.cn

作者简介: 陈廷芳(1963-), 男, 教授, 博士, 研究方向:非金属矿开发与应用, 联系地址:四川省绵阳市西南科技大学环境与资源学院(621010), E-mail:chentingfang@swust.edu.cn

引用本文:

张博, 付琪智, 林森, 陈廷芳, 孙仕勇, 蒋卉. 炭化纳米Co₃O₄/硅藻土复合材料制备及其性能[J]. 材料工程, 2019, 47(2): 62-67.
Bo ZHANG, Qi-zhi FU, Sen LIN, Ting-fang CHEN, Shi-yong SUN, Hui JIANG. Preparation and properties of carbonized nano Co₃O₄ and diatomite composites. Journal of Materials Engineering, 2019, 47(2): 62-67.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000540 或 http://jme.biam.ac.cn/CN/Y2019/V47/I2/62

Fig.1 炭化纳米Co₃O₄及其硅藻土复合材料的微观形态特征
(a)炭化纳米Co₃O₄；(b)炭化纳米Co₃O₄/硅藻土复合材料；(1)SEM图；(2)EDS能谱图；(3)TEM图

Fig.2 炭化纳米Co₃O₄及其硅藻土复合材料的XRD谱图

Fig.3 炭化纳米Co₃O₄, 炭化纳米Co₃O₄/硅藻土复合材料的VSM磁滞回线图

Table 1 炭化纳米Co₃O₄及其硅藻土复合材料的饱和磁化强度

Fig.4 炭化纳米Co₃O₄及其硅藻土复合材料的电磁特征
(a)介电常数实部ε′; (b)介电常数虚部ε″；(c)电磁常数实部μ′；(d)电磁常数虚部μ″；(e)介电损耗角正切tanδ_E；(f)磁损耗角正切tanδ_M

Fig.5 炭化纳米Co₃O₄及其硅藻土复合材料的微波吸收性能

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