期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 12, 页码 6421-6425出版社
AMER CHEMICAL SOC
DOI: 10.1021/am302053q
关键词
magnetostriction; self-composite; cobalt ferrite; nanocrystalline; sintering
资金
- Council of Scientific and Industrial Research (CSIR), India, through the Network Project on Nanostructured Advanced Materials [NWP-051]
- CSIR
Sintered polycrystalline cobalt ferrite is a potential magnetostrictive smart material for applications as sensors and actuators. A novel concept of enhancing the magnetostrictive strain of sintered cobalt ferrite by making self-composites from nanosized and bulk powders with different particle sizes of the same material as components is reported. The self-composites give higher magnetostriction coefficient and strain derivative when compared to the sintered products obtained from the individual powders. The individual components give a maximum magnetostriction up to similar to 310 ppm, whereas up to similar to 370 ppm is obtained for a two-component system consisting of powders of two different sizes. On the other hand, a three-component self-composite made from starting powders of 3 nm, 40 nm and >1 mu m give very high magnetostriction of similar to 400 ppm at 800 kA/m, suitable for making devices.
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