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A study of modified Fe_3O_4 nanoparticles for the synthesis of ionic ferrofluids

机译：改性Fe_3O_4纳米粒子用于离子型铁磁流体合成的研究

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摘要

XRD and XPS analyses revealed that a Fe(NO_3 )_3 ·9H_2O layer formed outside γ-Fe_2O_3 particles when Fe_3O_4 nanoparticles were treated with ferric nitrate. The particle density differed for untreated and treated particles and was not uniform for the latter. The specific saturation magnetization of both treated and untreated particles was used to estimate the thickness of the Fe(NO_3 )_3 ·9H_2O layer and the average density of the treated particles. The density of the treated particles was used to calculate the density of ferrofluids of different particle volume fractions. These values are in agreement with measured results. Therefore, the particle volume fraction can be designed to synthesize acid ionic ferrofluids based on Fe_3O_4 nanoparticles using Massart's method.
机译：XRD和XPS分析表明，当Fe_3O_4纳米粒子经硝酸铁处理后，在γ-Fe_2O_3粒子外部形成Fe（NO_3）_3·9H_2O层。对于未处理和已处理的颗粒，其颗粒密度有所不同，而对于后者，则不均匀。用处理过的和未处理过的颗粒的比饱和磁化强度来估计Fe（NO_3）_3·9H_2O层的厚度和处理过的颗粒的平均密度。处理过的颗粒的密度用于计算不同颗粒体积分数的铁磁流体的密度。这些值与测量结果一致。因此，可以使用Massart方法将颗粒体积分数设计为基于Fe_3O_4纳米粒子合成酸性离子铁磁流体。

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  • 来源
    《Applied Surface Science》 |2010年第23期|P.6977-6981|共5页
  • 作者

    Jian Li; Xiaoyan Qiu; Yueqiang Lin; Xiaodong Liu; Rongli Gao; Anrong Wang;

  • 作者单位

    School of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China;

    rnSchool of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China;

    rnSchool of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China;

    rnSchool of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China;

    rnSchool of Physical Science and Technology, Southwest University, Chongqing 400715, People's Republic of China;

    rnDepartment of Applied Technology, The Chongqing Three Gorge College, Chongqing 404000, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic materials; nanoparticles; ferrofluids;

    机译：磁性材料纳米粒子铁磁流体;

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