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化学共沉法制备的高饱和磁化强度Fe_(65)Co_(35)合金纳米颗粒 被引量:1

High saturation magnetization Fe_(65)Co_(35) nanoparticles synthesized by chemical co-precipitation
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摘要 利用化学共沉淀法制备Fe65Co35合金纳米颗粒,研究了共沉淀和退火工艺对纳米颗粒结构和磁性能的影响。研究表明,共沉淀反应的油浴温度为100℃时,最有利于FeCo合金的生成。在此油浴温度下合成的产物经300℃退火获得的磁性颗粒尺寸均匀、细小且磁性能最佳。低于或高于此油浴温度对产物的形貌和性能均产生不利的影响。随退火温度升高,产物颗粒尺寸增大,并在500℃以上发生严重的团聚现象。通过工艺优化,获得了Ms大于180A.m2/kg、粒径小于40 nm的纳米颗粒。 Fe65Co35 magnetic nano-particles were synthesized via co-precipitation process.The effects of co-precipitation and annealing parameters on the microstructure and magnetic properties were investigated.It was found that,when co-precipitation oil bathing at temperature of 100℃ and annealing at temperature of 300℃,the fine nanoparticles with uniform size distribution and optimal magnetic properties can be produced.Both lower and higher oil bath temperatures have negative influences on the morphology and magnetic properties of the product.The particle size increases with increasing annealing temperature,but when the annealing temperature reaches above 500℃,the particles tend to heavily aggregate.The Fe65Co35 nanoparticles with particle size of less than 50nm,Ms of higher than 180 A·m^2/kg have been successfully obtained for optimal processing conditions.
出处 《磁性材料及器件》 CAS CSCD 北大核心 2011年第2期20-24,共5页 Journal of Magnetic Materials and Devices
基金 广东省自然科学基金资助(8151064101000084) 广东省科技计划资助项目(2008B010600005) 华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0291 2009ZZ0025 2009ZM0247) 新金属材料国家重点实验室开放基金资助项目(2008F-01)
关键词 FeCo合金 纳米颗粒 化学共沉淀 结构 磁性能 FeCo alloys nanoparticle co-precipitation microstructure magnetic properties
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