Structure and magnetic properties of organiccoated Co microspheres prepared by solvothermal method

ZHANG Bin; WANG Xin; HUANG Qihui; JI Guangbin

doi:10.3969/j.issn.0438-1157.2012.02.042

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Structure and magnetic properties of organiccoated Co microspheres prepared by solvothermal method

更新时间：2025-12-10

- Structure and magnetic properties of organiccoated Co microspheres prepared by solvothermal method
- CIESC Journal Issue 2, Pages: 634-639(2012)
- 作者机构：
  
  南京航空航天大学材料科学与技术学院,江苏,南京
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.02.042
  CLC：
- Online First：05 February 2012，
  
  Published：05 February 2012
- 稿件说明：
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ZHANG Bin, WANG Xin, HUANG Qihui, et al. Structure and magnetic properties of organiccoated Co microspheres prepared by solvothermal method[J]. CIESC Journal, 2012, (2): 634-639.
DOI：

ZHANG Bin, WANG Xin, HUANG Qihui, et al. Structure and magnetic properties of organiccoated Co microspheres prepared by solvothermal method[J]. CIESC Journal, 2012, (2): 634-639. DOI： 10.3969/j.issn.0438-1157.2012.02.042.

摘要

以醋酸钴为钴源，乙二醇为溶剂，氢氧化钠为添加剂，三嵌段共聚物P123为表面活性剂，采用溶剂热法一步制备了有机物包裹的Co微米颗粒。通过表征测试发现，有机物包裹的Co微米颗粒为球状，粒径均匀，尺寸约5 μm左右。通过热重以及磁性能测试发现，所制备的有机物包裹Co微米颗粒在450 ℃以内热稳定性良好；饱和磁感应强度高达169 emu/g，矫顽力低至50 Oe，剩磁在10 emu/g以内，软磁性能良好。本研究中以常用溶剂水、乙醇为参照组进行了对比实验，并对样品进行了表征和性能测试。此外，本研究进一步探讨了表面活性剂P123对样品结构及性能的影响。

Abstract

In this paper

organic-coated Co metallic soft-magnetic microspheres with the average diameter at around 5 μm have been prepared by solvothermal method. We got several kinds of products by using different reducing agents in various conditions. The results of XRD(X-Ray Powder Diffraction)

FT-IR(FT-IR Spectromete)

SEM(Scanning Electron Microscope)

TEM(Transmission Electron Microscope)showthe material structure and surface characteristics of prepared samples. The size of the sample was about 5 μm

and it is obvious that there is organic package layer on the cobalt surface.The package was made by situ parcel method successfully. After 3 months

Co was not oxygenated by the result of XRD. Furthermore

We found the samples have outstanding thermal stability at 450 oC and soft-magnetic properties by using TG-DTA(Thermogravimetry-Differential thermal analysis)and VSM(Vibrating Sample Magnetometer) test. The Bs/Hc can respectively reach to as high/low as 169 emu/g /50 Oe as well as the Br less that 10 emu/g. Additionally

there is some positive connect between the formation and property of final products and the key experimental conditions

such as amounts of surfactant P123 or solvent.

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