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

被引：0
|
作者：
Yang W. [1 ]
Zhou G. [2 ]
Wang K. [1 ]
Cheng J. [2 ]
Zhang J. [2 ]
机构：
[1] State Key Laboratory of Advanced Power Transmission Technology, State Grid Global Energy Interconnection Research Institute, Beijing
[2] School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 10期
关键词：
Anatase type; Hollow glass microsphere; Hydrothermal synthesis method; Reflectivity; TiO[!sub]2[!/sub] coating;
D O I：
10.13801/j.cnki.fhclxb.20210105.001
中图分类号：
学科分类号：
摘要：
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%. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：3504 / 3511
页数：7
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