Synthesis and characterization of polypyrrole-BaFe12O19 nanocomposite

被引：47

作者：

Birsoz, B. ^{[1
]}

Baykal, A. ^{[1
]}

Sozeri, H. ^{[2
]}

Toprak, M. S. ^{[3
]}

机构：

[1] Fatih Univ, Dept Chem, TR-34500 Istanbul, Turkey

[2] TUBITAK UME, Natl Metrol Inst, TR-41470 Gebze, Turkey

[3] Royal Inst Technol KTH, Funct Mat Div, SE-16440 Stockholm, Sweden

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 493卷 / 1-2期

关键词：

Hexaferrites; Microwave absorbers; Citrate method; Conductivity; Magnetization; MICROWAVE-ABSORPTION PROPERTIES; MAGNETIC-PROPERTIES; BARIUM HEXAFERRITE; COMPOSITES; PARTICLES; FERRITE; NANOPARTICLES; POWDERS; BAFE12O19; ACIDS;

D O I：

10.1016/j.jallcom.2009.12.135

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polypyrrole-BaFe12O19 nanocomposite was successfully synthesized by an in situ polymerization of pyyrole in the presence of synthesized BaFe12O19 nanoparticles. Structural, morphological, electrical and magnetic properties of the nanocomposite were performed by XRD, FT-IR, TEM, TGA, VSM and ac conductivity measurements respectively. XRD analysis reveals the inorganic phase as bariumhexaferrite and TGA shows about 22 wt% loading of hexaferrite in the nanocomposite. FT-IR analysis indicates a successful conjugation of hexaferrite particles with polypyrrole. Magnetization measurements show that polypyrrole coating decreases the saturation magnetization of BaFe12O19 significantly. This reduction has been explained by the pinning of the surface spins by the possible adsorption of non-magnetic ions during the polymerization process. Interactions between the hard and impurity phases, determined using the Stoner-Wohlfarth theory, reveal that particles' single domain character and the coating destabilizes the remanence state of the polypyrrole-BaFe12O19 nanocomposite. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：481 / 485

页数：5

共 34 条

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