Hostname: page-component-76fb5796d-9pm4c Total loading time: 0 Render date: 2024-04-27T01:46:01.302Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Chen, P. L. and Chen, I. W., J. Am. Ceram. Soc., 79, p3129 (1996).Google Scholar
2. Mishra, R. S., Lesher, C. E. and Mukherjee, A. K., J. Am. Ceram. Soc., 79, p2989 (1996).Google Scholar
3. Boutz, M. M. R., Winnubst, L. and Burggraaf, A. J., J. Am. Ceram. Soc., 78, pl21 (1995).Google Scholar
4. Hague, D. C. and Mayo, M. J., J. Am. Ceram. Soc., 80, pl49 (1997).Google Scholar
5. Chen, D. J. and Mayo, M. J., J. Am. Ceram. Soc., 79, p906 (1996).Google Scholar
6. Moreli, A. and Hermosin, A., Am. Ceram. Soc Bull., 59. p626 (1980).Google Scholar
7. Yamamoto, H. and Mitsuoka, T., IEEE Trans, on Magnetics, 30, p5001 (1994).Google Scholar
8. Cho, Y. S. and Amarakoon, V. R. W., J. Am. Ceram. Soc., 79, p2755 (1996).Google Scholar
9. Slamovich, E. B. and Lange, F. F., J. Am. Ceram. Soc., 75, p2498 (1992).Google Scholar
10. Blenkenship, A. C. and Huntt, R. L., J. Appl. Phys., 37, pl066 (1966).Google Scholar