Effect of SiO2 on the thermal stability of carbonate/MgO composite for thermal energy storage

2nd International Workshop on Materials Science and Mechanical Engineering

机械制造;材料科学

Guo, Y.R.^1 ; Liu, Y.^1 ; Zhang, G.Q.^2 ; Deng, Z.F.^2 ; Xu, G.Z.^2 ; Li, B.R.^1

Departments of School of Energy, Power and Mechanical Engineering, University of North China Electric Power University, Beijing

102206, China^1

State Key Lab of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Beijing

102209, China^2

关键词: Eutectic salt;    High temperature;    High temperature molten salts;    Long term stability;    Nano-SiO2;    Structure and thermal properties;    Thermal storage;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/504/1/012011/pdf
DOI  :  10.1088/1757-899X/504/1/012011

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, a novel carbonate/MgO composite for high temperature thermal storage was prepared by doping nano-SiO2. Na2CO3-K2CO3 eutectic salt was used as the phase change material. The long-term stability of the samples was tested by holding at 750C for a period of time. The differential thermal analysis calorimeter, X-ray diffractometer and scanning electron microscope were employed to detected the possible influences of constant high temperature on thermal properties. The results showed that the doped nano-SiO2 particles can restrain high temperature molten salt loss and improve the stability of the composite in both structure and thermal properties.