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Preparation of high temperature composite phase change energy storage materials by yellow phosphorus slag and Na2SO4-NaCl
Received date: 2022-03-24
Online published: 2023-02-16
The high temperature composite phase change energy storage materials（C-PCMs） were prepared by mixed sintering method using yellow phosphorus slag and Na2SO4-NaCl as raw materials.The chemical compatibility，mechanical properties，phase change characteristics and thermal stability of C-PCMs were analyzed by XRD，SEM and TG-DSC.The results showed that the phase change material Na2SO4-NaCl had less erosive effect on yellow phosphorus slag under high temperature environment，and both had good chemical compatibility.With the increase of Na2SO4-NaCl content，the structure of C-PCMs was tended to be densified，and the mechanical strength and latent heat value were gradually increased.When the content of phase change material Na2SO4-NaCl was exceeded 60%（mass fraction），the C-PCMs had obvious leakage phenomenon.When the content of phase change material Na2SO4-NaCl was 60%（mass fraction），the compressive strength，Vickers hardness，bulk density and latent heat of C-PCMs were 122.30 MPa，208.90 HV，2.08 g/cm3 and 119.09 J/g，respectively.After 120 thermal cycles，the Na2SO4-NaCl in the C-PCMs did not leak，and the phase change properties remained good.
Key words： yellow phosphorus slag; Na2SO4-NaCl; phase change materials
Haodong HE , Lin YANG , Jianxin CAO . Preparation of high temperature composite phase change energy storage materials by yellow phosphorus slag and Na2SO4-NaCl[J]. Inorganic Chemicals Industry, 2023 , 55(2) : 126 -131 . DOI: 10.19964/j.issn.1006-4990.2022-0140
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