Low-temperature oxidation of metal nanoparticles obtained by chemical dispersion

Micro & nano letters

article

Ella L. Dzidziguri¹  Elena N. Sidorova¹  Jansaya E. Yahiyaeva¹  Dmitriy Yu. Ozherelkov²  Alexander A. Gromov²  Anton Yu. Nalivaiko² 

[1] Department of Functional Nanosystems and High Temperature Materials, National University of Science and Technology MISIS;KINETICA Engineering Center, National University of Science and Technology MISIS

关键词: tungsten;    particle size;    X-ray diffraction;    nanoparticles;    cobalt;    nanofabrication;    nickel;    oxidation;    transmission electron microscopy;    thermal analysis;    reduction (chemical);    scanning electron microscopy;    powders;    molybdenum;    thin films;    oxide film thickness;    low-temperature oxidation;    metal nanoparticles;    chemical dispersion;    reduction temperatures;    transmission electron microscopy;    thermogravimetric analysis;    specific surface area;    coherent scattering area;    scanning electron microscopy;    XRD;    particle size;    temperature 200.0 degC to 400.0 degC;    temperature 700.0 degC to 800.0 degC;    temperature 750.0 degC to 850.0 degC;    Mo;    Co;    Ni;    W;   

DOI  :  10.1049/mnl.2019.0706

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Oxidation of cobalt, nickel, molybdenum and tungsten nanoparticles under prolonged exposure in the air was studied. Nanoparticles were obtained by chemical dispersion with the following reduction temperatures: 200–400°C for cobalt; 200–400°C for nickel; 700–800°C for molybdenum and 750–850°C for tungsten. Scanning electron microscopy, transmission electron microscopy, XRD and thermogravimetric analysis were used for nanoparticles characterisation. The average size of nanoparticles, specific surface area and the coherent scattering area were determined. The method for oxide film thickness calculation on the surface of the nanoparticles was proposed and confirmed its adequacy. Based on experimental data, the growth law of the oxide film on the studied nanoparticles was determined. The obtained results can be used in the certification of nanoparticles and evaluation of a highly dispersed metal powders shelf life.

【 授权许可】

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