Preparation and Properties of Polypyrrole-Co0.5Zn0.5Fe2O4 Composites

doi:10.11901/1005.3093.2013.665

Chinese Journal of Materials Research

2014, Vol. 28

Issue (3): 180-184 DOI: 10.11901/1005.3093.2013.665

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Preparation and Properties of Polypyrrole-Co_0.5Zn_0.5Fe₂O₄ Composites

Ruiting MA,Ling HE,Xiao WANG,Haitao ZHAO(

)

School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159

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Ruiting MA,Ling HE,Xiao WANG,Haitao ZHAO. Preparation and Properties of Polypyrrole-Co_0.5Zn_0.5Fe₂O₄ Composites. Chinese Journal of Materials Research, 2014, 28(3): 180-184.

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Abstract

Nanocrystallined cobalt zinc ferrite was prepared by polyacrylamide gel process, and then the polypyrrole (PPy)-cobalt zinc ferrite composites were synthesized by in-situ chemical polymerization. The microstructure and morphology of the composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The magnetic and microwave dielectric properties of the composites were measured by vibrating sample magnetometer (VSM) and vector network analyzer of E5071C. The results show that the products are composites consisted of pure PPy and PPy-Co_0.5Zn_0.5Fe₂O₄, and the average particle sizes of PPy and PPy-Co_0.5Zn_0.5Fe₂O₄are about 200 nm and 180 nm, respectively. The saturation magnetization (M_s) and remanent magnetization (M_r) of the Co_0.5Zn_0.5Fe₂O₄ are 65.95 emu/g and 15.44 emu/g, respectively, and they are greater than that of PPy-Co_0.5Zn_0.5Fe₂O₄, but the coercive force (H_c) of the Co_0.5Zn_0.5Fe₂O₄ is smaller than that of PPy-Co_0.5Zn_0.5Fe₂O₄. Owing to the introduction of Co_0.5Zn_0.5Fe₂O₄ ferrites into the PPy matrix, the dielectric loss (tanε=ε''/ε') of the PPy is greater than that of the PPy-Co_0.5Zn_0.5Fe₂O₄, but the reflection loss of the PPy is smaller than that of the PPy-Co_0.5Zn_0.5Fe₂O₄. The maximum reflection loss of the PPy–Co_0.5Zn_0.5Fe₂O₄ composite is about -16.4 dB at 15.2 GHz with a bandwidth of 2.5 GHz.

Key words: composites PPy-Co_0.5Zn_0.5Fe₂O₄ magnetic properties reflection loss

Received: 13 September 2013

Fund: *Supported by National Natural Science Foundation of China No.51303108.

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	Ruiting MA
	Ling HE
	Xiao WANG
	Haitao ZHAO

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https://www.cjmr.org/EN/10.11901/1005.3093.2013.665 OR https://www.cjmr.org/EN/Y2014/V28/I3/180

Fig.1 XRD patterns of the composites. (a) PPy, (b) PPy-Co_0.5Zn_0.5Fe₂O₄ and (c) Co_0.5Zn_0.5Fe₂O₄

Fig.2 SEM images of PPy (a) and PPy-Co_0.5Zn_0.5Fe₂O₄ (b) composites

Fig.3 Hysteresis loops of Co_0.5Zn_0.5Fe₂O₄ (a) and PPy-Co_0.5Zn_0.5Fe₂O₄ (b)

Table 1 Magnetic parameters of Co_0.5Zn_0.5Fe₂O₄ and PPy-Co_0.5Zn_0.5Fe₂O₄ composites

Fig.4 Microwave dielectric loss of the composites. (a) PPy, (b) PPy-Co_0.5Zn_0.5Fe₂O₄

Fig.5 Curves of microwave reflection loss of PPy (a) and PPy-Co_0.5Zn_0.5Fe₂O₄ (b) composites

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