Porous Ba Ferrite Prepared from Wood Template

Materials

Nobuyasu Adachi¹  Masayuki Kuwahara²  Chee Kiong Sia² 

[1] Ceramics Research Laboratory, Nagoya Institute of Technology/ 10-6-29 Asahigaoka, Tajimi, Gifu 507-0071, Japan;

关键词: porous ceramics;    Ba-ferrite;    wood template;    magnetic anisotropy;   

DOI  :  10.3390/ma2041923

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.