黄磷渣与硫酸钠-氯化钠制备高温复合相变储能材料

doi:10.19964/j.issn.1006-4990.2022-0140

Abstract

Abstract:

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

CLC Number:

TQ110.3

HE Haodong,YANG Lin,CAO Jianxin. 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.

Figures/Tables 15

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样品编号	w（Na₂SO₄-NaCl）/%	w（黄磷渣）/ %	烧结样品后目视观察情况
H1	30	70	没有泄漏
H2	40	60	没有泄漏
H3	50	50	没有泄漏
H4	60	40	没有泄漏
H5	70	30	轻微泄漏和变形
H6	80	20	严重泄漏和变形

样品	无热循环的质量/g	120次热循环后的质量/g
H1	2.68	2.64
H2	2.42	2.39
H3	2.14	2.11
H4	2.31	2.29

样品	熔化			凝固
样品	起始温度/℃	峰值温度/℃	潜热值/ （J·g^-1）	起始温度/℃	峰值温度/℃	潜热值/ （J·g^-1）
H1	623.64	630.11	52.95	625.29	622.49	67.68
H2	624.46	630.88	75.33	626.62	623.04	70.53
H3	624.42	631.32	95.20	625.83	622.62	103.05
H4	624.83	631.64	119.09	626.52	623.32	137.78

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Preparation of high temperature composite phase change energy storage materials by yellow phosphorus slag and Na₂SO₄-NaCl

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