Volume 40 Issue 1
Jan.  2023
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YAO Chenhua, XIONG Yaxuan, REN Jing, et al. Preparation and properties of sodium nitrate/semi-coke ash shape-stable phase change composite[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 300-309. doi: 10.13801/j.cnki.fhclxb.20220222.002
Citation: YAO Chenhua, XIONG Yaxuan, REN Jing, et al. Preparation and properties of sodium nitrate/semi-coke ash shape-stable phase change composite[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 300-309. doi: 10.13801/j.cnki.fhclxb.20220222.002

Preparation and properties of sodium nitrate/semi-coke ash shape-stable phase change composite

doi: 10.13801/j.cnki.fhclxb.20220222.002
Funds:  Scientific Research Program of Beijing Municipal Education Commission (KM201910016011)
  • Received Date: 2021-11-18
  • Accepted Date: 2022-01-22
  • Rev Recd Date: 2022-01-18
  • Available Online: 2022-02-23
  • Publish Date: 2023-01-15
  • The massive accumulation of industrial solid waste semi-coke ash (SCA) will cause damage to local ecological environment. To promote the large-scale consumption of industrial solid waste semi-coke ash and fabricate low-cost shape-stable phase change composites (SSPCCs), semi-coke ash was innovatively proposed as a skeleton material to fabricate the SSPCCs. To evaluate the feasibility of the semi-coke ash as the skeleton material of the SSPCCs, eight NaNO3/semi-coke ash SSPCC samples with different mass ratio of the semi-coke ash to NaNO3 were fabricated. The key performance of the NaNO3/semi-coke ash SSPCCs were investigated by the differential scanning calorimetry, laser flash analysis, scanning electron microscopy, constant speed pressurization method and X-ray diffraction. Results show that the sample NaNO3/SCA-50 without visual leakage and deformation holds the optimal mass ratio 5:5 of the semi-coke ash to NaNO3 with the thermal energy storage capacity of 338.24 J/g ranging from 100 to 380℃ and the mechanical strength of 96.98 MPa. After 4027 heating/cooling cycles, the sample NaNO3/SCA-50 keeps good thermal stability and chemical compatibility, which indicates that the semi-coke ash is feasible for the SSPCCs fabrication, and provides a new way for recycling the resource of the solid waste semi-coke ash.

     

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