水-甘油基γ-Fe_2O_3/Ni_2O_3复合微粒磁性液体的磁化性质  

Magnetization Behavior of Ferrofluids Based onγ-Fe_2O_3/Ni_2O_3 Composite Nanoparticles in Water-Glyceryl Carrier Liquids

作　　者：龚小敏[1] 陈龙龙[1] 李军明[1] 李建[1] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2014年第5期78-83,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11074205)

摘　　要：采用化学诱导相变法制备了γ-Fe2O3/Ni2O3复合磁性纳米微粒,并用类似自形成离子型磁性液体的制备方法合成了水-甘油基γ-Fe2O3/Ni2O3磁性液体.用振动样品磁强计(VSM)测量了γ-Fe2O3/Ni2O3复合磁性微粒、不同比例水-甘油基磁性液体的磁化性质.结果表明,相同体积分数的水-甘油基γ-Fe2O3/Ni2O3磁性液体,由于基液的不同其饱和磁化强度也不同,纯水基磁性液体的约化饱和磁化强度与磁性纳米微粒的磁化强度吻合得比甘油基磁性液体好.γ-Fe2O3/Ni2O3 composite magnetic nanoparticles were prepared by chemically induced transition,and water-glycerolγ-Fe2O3/Ni2O3 ferrofluids were synthesized by a similar self-formed ionic ferrofluide.The magnetic properties of theγ-Fe2O3/Ni2O3 composite magnetic nanoparticles and of the waterglycerol ferrofluids of different proportions were measured by a vibrating sample magnetometer（VSM）. The results showed that saturation magnetizations of water-glycerylγ-Fe2O3/Ni2O3 ferrofluids with the same volume fraction were different because the carrier liquids were different and that the reduced saturation magnetization of the water-based ferrofluids matched better with the magnetization of the magnetic nanoparticles than the glyceryl-based ferrofluids.

关 键 词：磁性纳米微粒 甘油 磁性液体 饱和磁化强度 

分 类 号：O469[理学—凝聚态物理]