西南师范大学学报(自然科学版)
西南師範大學學報(自然科學版)
서남사범대학학보(자연과학판)
JOURNAL OF SOUTHWEST CHINA NORMAL UNIVERSITY
2009年
6期
45-48
,共4页
密度%铁氧体微粒%硝酸铁处理%饱和磁化强度
密度%鐵氧體微粒%硝痠鐵處理%飽和磁化彊度
밀도%철양체미립%초산철처리%포화자화강도
density%ferrite particle%ferric nitrate treatment%saturation magnetization
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.
鐵氧體納米微粒經硝痠鐵處理後,在其錶麵會生成一層其化學組份、磁性均不同于鐵氧體的殼層.被處理微粒的密度不同于未處理微粒,是不均勻的.如果處理後生成的殼層其化學組份被確定,併且微粒在處理後沒有相變產生,則根據處理前、後兩種微粒的比飽和磁化彊度,可估計處理後微粒的平均密度.因此,使用Massart法閤成痠性離子磁性液體時,可以準確設計微粒體積分數.
철양체납미미립경초산철처리후,재기표면회생성일층기화학조빈、자성균불동우철양체적각층.피처리미립적밀도불동우미처리미립,시불균균적.여과처리후생성적각층기화학조빈피학정,병차미립재처리후몰유상변산생,칙근거처리전、후량충미립적비포화자화강도,가고계처리후미립적평균밀도.인차,사용Massart법합성산성리자자성액체시,가이준학설계미립체적분수.
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 be 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.