Dispersion of antimony doped tin oxide nanopowders for preparing transparent thermal insulation water-based coatings
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ngshan Liu Guangxi NaterTech Co., Ltd., Nanning 530007, People’s Republic of China
Xu Liu and Zuodong Yinb) School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People’s Republic of China (Received 4 December 2016; accepted 11 May 2017)
Antimony doped tin oxide (ATO) is an ideal material for thermal insulation. To obtain the stable performance of ATO nanodispersions and measure the transparent and thermal insulation properties of the ATO coatings, we investigated how a dispersant and sand milling affect the stability of ATO dispersion, which has come to the results that adding an appropriate dispersant and sand milling for 2.0 h were beneficial to the ATO dispersion. We characterized the morphology, nanostructure, particle size distribution, zeta potential, and optical properties of the ATO dispersions by a transmission electron microscope (TEM), a laser particle size analyzer, and a spectrometer. The results show that the average particle size of the dispersions is about 50 nm and their absolute values of all zeta potentials are more than 40 mV. We coated the thermal insulation water-based coatings on quartz glasses by spin coating method, the effect of thermal insulation is evident with the increase of the ATO content, and there exists approximately 10 °C difference between the ATO sample and blank sample with the condition for maintaining high transmittance of visual light.
I. INTRODUCTION
With the rapid growth of industrial development, as we all know, energy conservation and environmental protection have become topics of global concern.1–3 Therefore, it is a priority for all of humanity to develop high-tech products with green technology to ensure the persistence of green environment on the earth. Nanomaterials are the essential foundation for the future development of the society. Nanoscience technology is a breakthrough for the future, and its rapid development has brought a series of significant changes to the field of industrial production technology and quality of life of the residents. With the continuous improvement of the preparation technology of nanomaterials and the new nanomaterials constantly emerging, we have reason to believe that the proportion of high-end nanoproducts will be steadily increased.4–7 The transparent thermal insulation water-based nanocoatings as a new energy saving material now not only
Contributing Editor: Sam Zhang Address all correspondence to these authors. a) e-mail: [email protected] b) e-mail: [email protected] DOI: 10.1557/jmr.2017.211
allows the glass to maintain a higher visible light transmittance but also can block a considerable part of infrared transmittance. The research found that n-type semiconductor materials with a wide band gap, such as indium tin oxide (ITO),8–10 fluorine or antimony doped tin oxide (FTO, ATO),11–15 aluminum or gallium doped zinc oxide (AZO, GZO),16–21 and so on, which have the similar optical properties (the material has high absorption in the ultraviolet light (UV light) and near infrared (NIR) region, high tran
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