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Study on Synthesis of Nanocrystalline Co3O4 Powders by Solution Combustion
Technique and the Subsequent Heat Treatment Process |
| WEI Yupeng1,2, WANG Haiyan1,2, LAN Wei3, LU Xuefeng1,2, LA Peiqing1,2, MA Jiqiang1,2
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1 College of Material Science and Technology, Lanzhou University of Technology, Lanzhou 730050;
2 State Key Laboratory of
Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050;
3 College of Physics Science and Technology, Lanzhou University, Lanzhou 730000 |
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Abstract Co3O4 powders were synthesized by solution combustion technique using glycine, citric acid, glucose as fuel,respectively, and Co(NO3)2·6H2O as oxidizing agent. Microstructure, morphology and magnetic properties of Co3O4 powders which were synthesized through glycine as fuel and annealed at 500 ℃, 600 ℃ and 700 ℃ were investigated. The results showed that Co3O4 powders can be synthesized by combustion reaction with different precursor solutions at 300 ℃. The Co3O4 powders which were synthesized by using glycine as fuel had large particle zise, certain porosity, good dispersion and a small amount of residual glycine. The nanocrystalline Co3O4 powders with high purity, fine dispersion, 80 nm average radial dimension could be obtained while glycine-to-Co(NO3)2·6H2O molar ratio was 1.11∶1 and annealing temperature was 600 ℃. The synthesized Co3O4 powders annealed at 600 ℃ and 700 ℃ exhibited lower coercivity and remanence value than those annealed at 500 ℃.
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Published: 25 March 2017
Online: 2018-05-02
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2017, Vol. 31 
