Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite
Cobalt ferrite is synthesized via a simple solvothermal method. Then, the effect of the degree of cobalt-ferrite growth on its morphology, structure, electromagnetic performance, and microwave absorption is studied as a function of the solvothermal reaction time. When the reaction time during synthe...
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doaj-55a889a0dd3d41d493f82df055e3e3242020-11-27T08:02:17ZengMDPI AGMaterials1996-19442020-11-01135331533110.3390/ma13235331Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt FerriteYue Yuan0Shicheng Wei1Yi Liang2Bo Wang3Yujiang Wang4National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, ChinaCobalt ferrite is synthesized via a simple solvothermal method. Then, the effect of the degree of cobalt-ferrite growth on its morphology, structure, electromagnetic performance, and microwave absorption is studied as a function of the solvothermal reaction time. When the reaction time during synthesis is 8 h, the structure of cobalt ferrite is hollow spheres. In addition, when the reaction time is 12 h and 16 h, it becomes a submicron sphere with a diameter of 100–150 nm. With the increase of reaction time, cobalt ferrite underwent the process of cobalt ferrite formation, hollow structure formation, hollow structure disappearance, agglomeration separation and reagglomeration in 4–16 h. In general, CoFe<sub>2</sub>O<sub>4</sub>-8h shows better microwave absorption-the effective absorption bandwidth is 9.84 GHz (6–15.84 GHz) for a thickness of 1.72–3.72 mm. This represents a minimum return loss of −47.24 dB. A better understanding of both the synthesis parameters and the relationship between structure and electromagnetic properties can open new possibilities for applications and the development of microwave absorbing materials.https://www.mdpi.com/1996-1944/13/23/5331cobalt ferritefeaction timeftructureficrowave absorption properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yue Yuan Shicheng Wei Yi Liang Bo Wang Yujiang Wang |
spellingShingle |
Yue Yuan Shicheng Wei Yi Liang Bo Wang Yujiang Wang Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite Materials cobalt ferrite feaction time ftructure ficrowave absorption properties |
author_facet |
Yue Yuan Shicheng Wei Yi Liang Bo Wang Yujiang Wang |
author_sort |
Yue Yuan |
title |
Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite |
title_short |
Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite |
title_full |
Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite |
title_fullStr |
Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite |
title_full_unstemmed |
Effect of Solvothermal Reaction-Time on Microstructure and Microwave Absorption Properties of Cobalt Ferrite |
title_sort |
effect of solvothermal reaction-time on microstructure and microwave absorption properties of cobalt ferrite |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-11-01 |
description |
Cobalt ferrite is synthesized via a simple solvothermal method. Then, the effect of the degree of cobalt-ferrite growth on its morphology, structure, electromagnetic performance, and microwave absorption is studied as a function of the solvothermal reaction time. When the reaction time during synthesis is 8 h, the structure of cobalt ferrite is hollow spheres. In addition, when the reaction time is 12 h and 16 h, it becomes a submicron sphere with a diameter of 100–150 nm. With the increase of reaction time, cobalt ferrite underwent the process of cobalt ferrite formation, hollow structure formation, hollow structure disappearance, agglomeration separation and reagglomeration in 4–16 h. In general, CoFe<sub>2</sub>O<sub>4</sub>-8h shows better microwave absorption-the effective absorption bandwidth is 9.84 GHz (6–15.84 GHz) for a thickness of 1.72–3.72 mm. This represents a minimum return loss of −47.24 dB. A better understanding of both the synthesis parameters and the relationship between structure and electromagnetic properties can open new possibilities for applications and the development of microwave absorbing materials. |
topic |
cobalt ferrite feaction time ftructure ficrowave absorption properties |
url |
https://www.mdpi.com/1996-1944/13/23/5331 |
work_keys_str_mv |
AT yueyuan effectofsolvothermalreactiontimeonmicrostructureandmicrowaveabsorptionpropertiesofcobaltferrite AT shichengwei effectofsolvothermalreactiontimeonmicrostructureandmicrowaveabsorptionpropertiesofcobaltferrite AT yiliang effectofsolvothermalreactiontimeonmicrostructureandmicrowaveabsorptionpropertiesofcobaltferrite AT bowang effectofsolvothermalreactiontimeonmicrostructureandmicrowaveabsorptionpropertiesofcobaltferrite AT yujiangwang effectofsolvothermalreactiontimeonmicrostructureandmicrowaveabsorptionpropertiesofcobaltferrite |
_version_ |
1724413890276622336 |