Influence of synthesis methods with low annealing temperature on the structural and magnetic properties of CoFe2O4 nanopowders for permanent magnet application

被引：47

作者：

Abraime, B. ^{[1
,2
]}

El Maalam, K. ^{[1
,2
]}

Fkhar, L. ^{[1
,5
]}

Mahmoud, A. ^{[3
]}

Boschini, F. ^{[3
]}

Tamerd, M. Ait ^{[2
]}

Benyoussef, A. ^{[2
]}

Hamedoun, M. ^{[1
]}

Hlil, E. K. ^{[4
]}

Ali, M. Ait ^{[5
]}

El Kenz, A. ^{[2
]}

Mounkachi, O. ^{[2
]}

机构：

[1] MAScIR Fdn, Mat Nanomat Ctr, Rabat, Morocco

[2] Mohammed V Univ, Fac Sci, Lab Condensed Matter & Interdisciplinary Sci LaMC, Rabat, Morocco

[3] Univ Liege, Inst Chem, CESAM, GREENMAT, B6, B-4000 Liege, Belgium

[4] CNRS, Inst Neel, UJF, BP 166, F-38042 Grenoble, France

[5] Cadi Ayyad Univ, Fac Sci Semlalia, Coordinat Chem Lab, Marrakech, Morocco

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2020年 / 500卷

关键词：

Cobalt ferrite; Maximum energy product; Permanent magnet; Synthesis methods; COBALT FERRITE NANOCRYSTALS; NIFE2O4; NANOPARTICLES; OPTICAL-PROPERTIES; COPRECIPITATION; TRANSITION; BEHAVIOR;

D O I：

10.1016/j.jmmm.2020.166416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt ferrite nanopowders were prepared with low annealing temperatures (400 degrees C and 600 degrees C) using four different synthesis methods: co-precipitation, sol-gel, sol-gel autocombustion and microemulsion. The pure phase is obtained in all the samples and confirmed using the XRD diffraction. The crystallite size is calculated based on the XRD patterns and ranged between similar to 9 nm and similar to 26 nm. The SEM micrographs show an agglomeration with an increase of grain size between 400 degrees C and 600 degrees C samples for all the used methods. The magnetic properties are given. The best obtained values are M-s = 80,319 emu/g, H-c = 2057,97 Oe and (BH)(max) = 0.3313 MGOe for co-precipitation, sol-gel and sol-gel autocombustion, respectively. An improvement of 89% in (BH)(max) value is observed in the case of sol-gel auto-combustion when we go from 400 degrees C to 600 degrees C.

引用

页数：8

共 67 条

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Abraime, B. ;

Mahmoud, A. ;

Boschini, F. ;

Tamerd, M. Ait ;

Benyoussef, A. ;

Hamedoun, M. ;

Xiao, Y. ;

El Kenz, A. ;

Mounkachi, O. .

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