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Volume 38 Issue 10
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YANG Wei, ZHOU Guangwei, WANG Kun, et al. Preparation of TiO2 shelled hollow glass microspheres with high reflectivity by hydrothermal method[J]. Acta Materiae Compositae Sinica, 2021, 38(10): 3514-3521. DOI: 10.13801/j.cnki.fhclxb.20210105.001
Citation: YANG Wei, ZHOU Guangwei, WANG Kun, et al. Preparation of TiO2 shelled hollow glass microspheres with high reflectivity by hydrothermal method[J]. Acta Materiae Compositae Sinica, 2021, 38(10): 3514-3521. DOI: 10.13801/j.cnki.fhclxb.20210105.001
shu

Preparation of TiO2 shelled hollow glass microspheres with high reflectivity by hydrothermal method

  • 1.

    State Key Laboratory of Advanced Power Transmission Technology, State Grid Global Energy Interconnection Research Institute, Beijing 102211, China

  • 2.

    School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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  • Received Date: October 25, 2020
  • Accepted Date: December 24, 2020
  • Available Online: January 04, 2021
    Abstract
  • The high-reflectivity anatase TiO2 shell HGM (HGM@TiO2) was prepared by hydrothermal synthesis method, using tetrabutyl titanate, hydrochloric acid, deionized water, hollow glass microspheres (HGM) as raw materials and ethanol as solvent. SEM, EDS, FTIR, XRD, UV-VIS-NIR, thermal conductivity meter were used to study the effect of the amount of tetrabutyl titanate on the surface morphology, surface chemical composition, phase structure, reflection performance, and thermal conductivity of the microspheres. The results show that: The anatase TiO2 is successfully coated on the surface of HGM, the coating morphology is complete and uniform, and the coating thickness becomes thicker with the increase of the amount of titanium source; Compared with the original HGM, the thermal conductivity of HGM@TiO2 has a slight increase, and the maximum increase is only 0.007 W/(m·K), which proves that the coating of TiO2 has little effect on the thermal insulation performance of HGM. The spectral reflectance of the coated HGM has been greatly improved in the visible and near-infrared bands, with a maximum increase of 13%, and the highest reflectance of HGM@TiO2 has reached more than 90%.
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    • References (21)
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