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

All Science Journal Classification (ASJC) codes

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

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