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Microstructural Aspects of Nanocrystalline LiZn Ferrites Densified with Chemically Derived Additives

Published online by Cambridge University Press:  10 February 2011

Yong S. Cho ,
Vemon L. Burdick ,
Vasantha R. W. Amarakoon ,
Elijah Underhill  and
Leo Brissette
Yong S. Cho
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, NY14802
Vemon L. Burdick
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, NY14802
Vasantha R. W. Amarakoon
Affiliation:
New York State College of Ceramics at Alfred University, Alfred, NY14802
Elijah Underhill
Affiliation:
Electromagnetic Science (EMS) Technologies Inc., Norcross, GA 30092
Leo Brissette
Affiliation:
Electromagnetic Science (EMS) Technologies Inc., Norcross, GA 30092
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Abstract

Densification behavior and microstructural characteristics of nanocrystalline LiZn ferrites with chemically derived additives were investigated. Nanocrystalline Li0.3Zn0.4Fe2.3O4 powders having a ≈ 15 nm size were prepared at a low temperature of 450°C by a chemical synthesis using a combustible polyacrylic acid (PAA). Small amounts of Si, Ca and Mn were incorporated into the nanocrystalline ferrites via sol-gel reactions utilizing tetraethyl orthosilicate, calcium isopropoxide and manganese acetate. This process was believed to give a homogeneous distribution of the additives over the nanocrystalline ferrites. A uniform microstructure was obtained without any evidence of exaggerated grain growth after sintering at 1100°C. Saturation magnetization and coercive force were found to increase with the chemical additives. The results were compared with those of the same composition, but processed by the conventional batch-mixing of corresponding oxide additives.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 494: Symposium V – Science & Technology of Magnetic Oxides , 1997 , 27
Copyright
Copyright © Materials Research Society 1998

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References

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