High Coercive Barium Hexaferrite Powders by Partial Ba2+- and Fe3+-Substitution for Magnetic Sensor Applications
✍ Scribed by S. Belau; B. Halbedel; D. Hülsenberg
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 225 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0933-5137
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✦ Synopsis
The synthesis of the modified barium hexaferrite (BHF) powders and the adjustment of the magnetic properties for sensoric applications are realized by the glass crystallization technique in the system BaO-Fe 2 O 3 -B 2 O 3 . Two ways for modification of the BHF-powders were used. The first possibility is the partial substitution of the oxides in the basic melt by other oxides (e.g. Fe 2 O 3 by Al 2 O 3 and BaO by SrO). The second way is the variation of the process conditions. The obtained modified powders were analyzed for their crystallographic structure, chemical composition, particle morphology and magnetic properties. The nanoscaled powders with modified magnetic properties open a wide application field. One application is, to use it in flexible powder filled cellulose fiber sensor for position detection in the micro processing technology and micro measurement technology.