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- W3039032091 abstract "In this paper a novel SiO2@NaNO3 microcapsule thermal storage material is successfully fabricated via water-limited sol-gel method. The effects of SiO2 nanoparticles on the microstructures, thermal conductivity, specific heat capacity, latent heat and thermal stability are investigated. SEM and TEM investigation indicates that the spherical SiO2 nanoparticles with an average diameters of 30 nm are coated on the surface of NaNO3 evenly to form a homogeneous and stable core-shell structure. Microencapsulated composites are characterized by XRD and FTIR to determine the chemical compositions and structures. The thermal conductivity of SiO2@NaNO3 microcapsules is significantly enhanced by 62.9% (0.756 W m−1 K−1) compared with 0.464 W m−1 K−1 of that of NaNO3. In addition, the latent heat, phase change temperature, specific heat capacity and thickness of shell of the microencapsulated NaNO3 with 18.1 wt% SiO2 were 310.1°C, 144.7 J g−1, 1.831 J/(g·K), and 80-150 nm, respectively. Furthermore, microencapsulated NaNO3 have excellent shape and thermal stability at working temperature range. SiO2 nanoparticles are uniformly attached to the modified NaNO3 by electrostatic interaction to create a physical protective SiO2 barrier, which can effectively inhibit the leakage and cauterization of melting NaNO3." @default.
- W3039032091 created "2020-07-10" @default.
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- W3039032091 date "2020-07-05" @default.
- W3039032091 modified "2023-09-25" @default.
- W3039032091 title "Study on the microstructures and thermal properties of <scp> SiO <sub>2</sub> </scp> @ <scp> NaNO <sub>3</sub> </scp> microcapsule thermal storage materials" @default.
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- W3039032091 doi "https://doi.org/10.1002/er.5566" @default.
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