Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives

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

Research output: Contribution to journalConference article

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)27-32
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume494
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 Fall MRS Symposium - Boston, MA, USA
Duration: 1997 Dec 11997 Dec 4

Fingerprint

Ferrites
ferrites
carbopol 940
Nanocrystalline powders
tetraethyl orthosilicate
Saturation magnetization
Manganese
densification
Coercive force
Grain growth
Densification
Oxides
Sol-gels
manganese
calcium
acetates
Calcium
sintering
Acetates
Sintering

All Science Journal Classification (ASJC) codes

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

Cite this

Cho, Yong Soo ; Burdick, Vernon L. ; Amarakoon, Vasantha R.W. ; Underhill, Elijah ; Brissette, Leo. / Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives. In: Materials Research Society Symposium - Proceedings. 1997 ; Vol. 494. pp. 27-32.
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Microstructural aspects of nanocrystalline LiZn ferrites densified with chemically derived additives. / Cho, Yong Soo; Burdick, Vernon L.; Amarakoon, Vasantha R.W.; Underhill, Elijah; Brissette, Leo.

In: Materials Research Society Symposium - Proceedings, Vol. 494, 01.12.1997, p. 27-32.

Research output: Contribution to journalConference article

TY - JOUR

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

AU - Cho, Yong Soo

AU - Burdick, Vernon L.

AU - Amarakoon, Vasantha R.W.

AU - Underhill, Elijah

AU - Brissette, Leo

PY - 1997/12/1

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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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EP - 32

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