经硝酸铁处理的铁氧体微粒的密度测量(英文)  

The Measurement of Density for Ferrite Particle Treated by Using Ferric Nitrate

作　　者：林跃强[1] 李建[1] 高荣礼[1] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2009年第6期45-48,共4页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：重庆市自然科学基金资助项目(CSTC,2007BA3031)~~

摘　　要：铁氧体纳米微粒经硝酸铁处理后,在其表面会生成一层其化学组份、磁性均不同于铁氧体的壳层.被处理微粒的密度不同于未处理微粒,是不均匀的.如果处理后生成的壳层其化学组份被确定,并且微粒在处理后没有相变产生,则根据处理前、后两种微粒的比饱和磁化强度,可估计处理后微粒的平均密度.因此,使用Massart法合成酸性离子磁性液体时,可以准确设计微粒体积分数.While ferrite nanoparticle is treated by using ferric nitrate, a shell layer, whose chemical components and magnetic properties are different from the ferrite, would form around the particle. The density of the treated particle is different from the untreated particle and not uniform. According to the specific saturation magnetization of both treated and untreated particles, average density of the treated particle can he estimated if the chemical components of the shell layer are known, and there is not transition in the particles after they are treated. Therefore, the particle volume fraction can be decided accurately for synthesizing acid ionic ferrofluids by Massart＇s method.

关 键 词：密度 铁氧体微粒 硝酸铁处理 饱和磁化强度 

分 类 号：O469[理学—凝聚态物理]