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Synthesis of ultra-fine iron powder by combining the flame aerosol synthesis and postreduction

Published online by Cambridge University Press:  08 November 2019

Zili Zhang ,
Hui Tian ,
Shuiqing Li  and
Qiuliang Wang
Zili Zhang
Affiliation:
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Hui Tian
Affiliation:
Center for Combustion Energy, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Shuiqing Li*
Affiliation:
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Qiuliang Wang*
Affiliation:
Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China; and University of Chinese Academy of Sciences, Beijing 100049, China
*
a)Address all correspondence to these authors. e-mail: lishuiqing@tsinghua.edu.cn
b)e-mail: wongsm17@mail.iee.ac.cn
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Abstract

The global market requirement of ultra-fine iron powder (UFIP), with a range size of 0.1–1 μm, is more than 20,000 tons per annum. However, no low-cost nontoxic synthesis route of UFIP is known. In this study, we used the low-cost, rapid, and scalable flame aerosol synthesis (FAS) method to synthesize iron oxide nanoparticles with different size and morphology. Combining with a postreduction heat treatment process, a feasible synthesis route of UFIP which meets the commercial production criteria has been developed. By optimizing the precursor concentration and postreduction heat treatment parameters, the final particle size of UFIP can be controlled. The evolution of the microstructure, phase formation, and magnetic properties during the postreduction heat treatment are systematically investigated, and a feasible reaction model has been established. This work provides an important starting point for the facile commercial synthesis of UFIP and can be readily expanded to other pure metals.

Keywords

nanostructureflame synthesismagnetic properties
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 23 , 16 December 2019 , pp. 3964 - 3974
Copyright
Copyright © Materials Research Society 2019 

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