On the microstructural and magnetic properties of fine-grained CoFe2O4 ceramics produced by combining polyol process and spark plasma sintering

被引：31

作者：

Gaudisson, T. ^{[1
]}

Artus, M. ^{[1
]}

Acevedo, U. ^{[2
]}

Herbst, F. ^{[1
]}

Nowak, S. ^{[1
]}

Valenzuela, R. ^{[2
]}

Ammar, S. ^{[1
]}

机构：

[1] Univ Paris Diderot, Sorbonne Paris Cite, Lab ITODYS, CNRS UMR 7086, F-7205 Paris, France

[2] Univ Nacl Autonoma Mexico, Dept MMC, Inst Invest Mat, Mexico City 04510, DF, Mexico

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 370卷

关键词：

CoFe2O4; Superparamagnetic nanoparticle; Polyol; Process; TEM-SEM; Ferrimagnetic ceramic; SPS; FERRITE NANOPARTICLES; SIZE; PARTICLES; FIELD;

D O I：

10.1016/j.jmmm.2014.06.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Starting from polyol-made CoFe2O4. ferrite nanoparLicles of different aggregation states, high density fine-grained ceramics were produced using Spark Plasma Sintering technique at 600 and 500 degrees C, under vacuum and applying a uniaxial pressure of more than 80 MPa. The grain growth of thus produced ceramics appears to be proportional to the temperature plateau and inversely proportional to the aggregation state of the initial powders. Average grain sizes ranging between about 50 and 350 nm were obtained. In all the cases, magnetic measurements evidenced a ferrimagnetic behavior at room temperature with non-zero coercivity, while their starting powders exhibited superparamagnetic features. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：87 / 95

页数：9

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