摘要
利用超声和酸处理工艺将膨胀石墨剥离成纳米厚度的薄片,并利用简单的共沉积和退火还原工艺在石墨薄片上均匀沉积了铁钴镍磁性合金粒子.样品静磁性能与吸波性能的测试结果表明,此类材料具备优异的软磁性能和电磁波吸收性能.以600℃退火的Fe3Co6Ni/石墨薄片作为吸波剂的复合材料在12.6GHz处最大吸收可达-24dB,有效吸收带宽(<-5dB)达8GHz.通过调节合金的元素比例和退火工艺,可以控制样品的吸波性能.
Exfoliated graphite was separated into nano-sized flakes by ultrasonication and acid treatment,and then FeCoNi alloy particles were deposited uniformly on the surface of flakes by co-deposition method and annealing treatment process.Magnetic and microwave Absorbing properties of the obtained samples were measured.The results show that the synthesized composites possess good soft magnetic performance and effective microwave Absorption.The composite consisting of Fe3Co6Ni/graphite flakes annealed at 600℃ as an Absorber has the maximum Absorption value of-24dB at 12.6GHz,and the effective Absorbing bandwidth（-5dB） is about 8GHz.The characteristics of microwave Absorption can be controlled by adjusting element ratios in alloy and the parameters of heat treatment process.This kind of composite has great potential and investigation value in microwave Absorbing fields.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第4期406-410,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50572047)
关键词
石墨薄片
铁钴镍合金
吸波材料
graphite flakes
FeCoNi alloy
microwave Absorbing materials
