Investigations on thermal properties of Metal-doped Na2CO3/MgO composites for thermal energy storage

The Na2CO3/MgO composites doped with metal part icles, such as Cu, Al, Fe, etc. were prepared. Their synthesis, phase composition, chemical compatibility and thermal properties were investigated. The XRD results show that Na2CO3 and MgO have good chemical compatibility. The density of the sample can...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-04, Vol.504 (1)
Main Authors: Deng, Z F, Qian, J W, Zhang, G Q, Xu, G Z, Yang, C Y
Format: Article
Language:English
Subjects:
Aluminum
Chemical compatibility
Chemical composition
Chemical synthesis
Composite materials
Copper
Doping
Energy storage
Iron
Latent heat
Magnesium oxide
Melting points
Metal powders
Oxidation
Phase composition
Sintering (powder metallurgy)
Sodium carbonate
Thermal conductivity
Thermal energy
Thermodynamic properties
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Summary:The Na2CO3/MgO composites doped with metal part icles, such as Cu, Al, Fe, etc. were prepared. Their synthesis, phase composition, chemical compatibility and thermal properties were investigated. The XRD results show that Na2CO3 and MgO have good chemical compatibility. The density of the sample can be increased with doping Cu powders. The onset temperature and the melting point of samples increase with doping Al powder, while those properties with doping Cu powder decrease. With the increase of the content of Na2CO3 in the sample, the onset temperature and the melt ing point show an increasing trend. But both the latent heat and the thermal conductivity are shown to be decreased in comparison to Na2CO3/MgO composites. Since the samples are sintered in air, the metal powders doped in the PCMs can be oxidized inevitably. Based on these results, it can be inferred that the deterioration of the thermal properties have close relations with the oxidation of metal powders.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/504/1/012015