Porous Ba Ferrite Prepared from Wood Template

Ba ferrite materials with porous microstructures were prepared from a natural cedar wood template in order to investigate new electromagnetic shielding materials. The wood templates were infiltrated with barium nitrate and iron nitrate solutions (molar ratio = 1:12) and dried to form ferrite gel, th...

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Bibliographic Details
Published in:Materials 2009-11, Vol.2 (4), p.1923-1928
Main Authors: Adachi, Nobuyasu, Kuwahara, Masayuki, Sia, Chee Kiong, Ota, Toshitaka
Format: Article
Language:English
Subjects:
Anisotropy
Grain growth
Nitrates
Permeability
Pore size
Sintering
Temperature
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Summary:Ba ferrite materials with porous microstructures were prepared from a natural cedar wood template in order to investigate new electromagnetic shielding materials. The wood templates were infiltrated with barium nitrate and iron nitrate solutions (molar ratio = 1:12) and dried to form ferrite gel, then, they were sintered in air at a temperature between 800 °C and 1400 °C. The 1-dimensional porous structures were retained after sintering and the pore size was approximately 10–20 μm. These ferrites show large coercive force and anisotropy field. The largest coercive force was obtained for the specimen sintered at 800 °C.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma2041923