Structural and magnetic properties of CoFe2O4 nanopowders, prepared using a modified Pechini method

被引：30

作者：

Vlazan, Paulina ^{[1
]}

Stoia, Marcela ^{[2
,3
]}

机构：

[1] Inst Res & Dev Electrochem & Condensed Matter, P Andronescu St 1, Timisoara 300224, Romania

[2] Politehn Univ Timisoara, Res Inst Renewable Energy, Piata Victoriei 2, Timisoara 300006, Romania

[3] Politehn Univ Timisoara, Fac Ind Chem & Environm Engn, Bvd Vasile Parvan 6, Timisoara 300223, Romania

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 01期

关键词：

Nanoparticles; Cobalt ferrite; Sol-gel; Citric acids; Alcohols; COBALT FERRITE NANOPARTICLES; AUTO-COMBUSTION SYNTHESIS; TEMPERATURE; MICROSTRUCTURE;

D O I：

10.1016/j.ceramint.2017.09.207

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cobalt ferrite nanopowders were synthesized by means of the sol-gel method, using citric acid as a chelating agent, and various alcohols as gelling agent: ethanol (ET), ethylene glycol (EG), polyvinyl alcohol (PVA), 1,3 propanediol (PD) and a mixture of PVA and EG. The simultaneous TG/DTA analysis revealed different thermal behaviours of the synthesized gels, depending on the gelling agent. The powders obtained at 500 degrees C and annealed at 700 degrees C and 1000 degrees C contain a single CoFe2O4 phase. Scanning electron microscopy (SEM) revealed the influence of the gelling agent on the morphology of cobalt ferrite particles. The coercivity and the saturation magnetization of the powders obtained at 500 degrees C showed a strong dependence on the crystallite size, determined by the nature of the gelling agent.

引用

页码：530 / 536

页数：7

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