Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives

Yong S. Cho; Vernon L. Burdick; Vasantha R.W. Amarakoon; Elijah Underhill; Leo Brissette

doi:10.1557/proc-494-27

Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives

Yong S. Cho, Vernon L. Burdick, Vasantha R.W. Amarakoon, Elijah Underhill, Leo Brissette

Department of Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Densification behavior and microstructural characteristics of nanocrystalline LiZn ferrites with chemically derived additives were investigated. Nanocrystalline Li_0.3Zn_0.4Fe_2.3O₄ 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.

Original language	English
Pages (from-to)	27-32
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	494
DOIs	https://doi.org/10.1557/proc-494-27
Publication status	Published - 1997
Event	Proceedings of the 1997 Fall MRS Symposium - Boston, MA, USA Duration: 1997 Dec 1 → 1997 Dec 4

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives",

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.",

author = "Cho, {Yong S.} and Burdick, {Vernon L.} and Amarakoon, {Vasantha R.W.} and Elijah Underhill and Leo Brissette",

year = "1997",

doi = "10.1557/proc-494-27",

language = "English",

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journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

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T1 - Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives

AU - Cho, Yong S.

AU - Burdick, Vernon L.

AU - Amarakoon, Vasantha R.W.

AU - Underhill, Elijah

AU - Brissette, Leo

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

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JF - Materials Research Society Symposium - Proceedings

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T2 - Proceedings of the 1997 Fall MRS Symposium

Y2 - 1 December 1997 through 4 December 1997

ER -