NiZnCu铁氧体纳米粉末的红外特征及磁性能  

Infrared spectrum characters and magnetic properties of NiZnCu ferrite naopowders

作　　者：孔小东[1] 朱梅五[1] 

机构地区：[1]海军工程大学理学院化学与材料系,湖北武汉430033

出　　处：《云南大学学报（自然科学版）》2005年第S1期60-63,共4页Journal of Yunnan University(Natural Sciences Edition)

摘　　要：采用PEG溶胶-凝胶法制备Ni1-xZnxFe2O4,Ni0.65-xZn0.35CuxFe2O4纳米粉末,在不同温度下进行热处理,测定其磁性能;对NiFe2O4纳米粉末,测定XRD谱、TG-DTA曲线和红外吸收光谱,分析其物理、化学过程;测定其红外漫反射谱,分析其红外特征.结果表明,凝胶自燃烧后有机物已全部去掉;200-600℃之间的热处理对粉末的长大和晶化过程的影响,并不表现明显的差异;800℃处理后,晶化程度增强,粉末粒径也显著增大;红外漫反射谱可以较好地反映粉末的尺寸效应和形态效应,粉末粒径越小,漫反射函数值越大;铁氧体纳米粉末的磁性能与热处理温度、化学组成、粉末的形态及粒径大小有着十分密切的关系.Ni1-xZnxFe2O4, Ni0.65-xZn0.35CuxFe2O4 nanopowders were synthesized by PEG sol-gel method, and were annealed at different temperatures. The magnetic properties were measured using vibrating sample magnetometer. The physical and chemical processes were analyzed using XRD, TG-DTA, IR. The infrared character were measured using diffuse reflectance spectroscopy. The results indicate that the organic compounds in gel were eliminated in ignition; it was not obvious about the effects of the heat-treatment in 200-60...

关 键 词：NiZnCu铁氧体纳米粉末 XRD谱 TG-DTA 红外光谱 磁性 

分 类 号：TM277[一般工业技术—材料科学与工程]