Improving anti-infrared radiation and heat insulation by potassium hexatitanate whisker-doped Al2O3–SiO2 composite xerogel

Autor: Liang Furong, Liu Weijun, Han Xiuxiu, Zhang Boru, Zhang Shuhua
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Royal Society Open Science, Vol 5, Iss 12 (2018)
Druh dokumentu: article
ISSN: 2054-5703
DOI: 10.1098/rsos.180787
Popis: Taking potassium hexatitanate whisker (PTW) modified by silane coupling agent KH550, aluminium nitrate inorganic salt and tetraethyl orthosilicate and deionized water, respectively, as infrared sunscreen, aluminium source and raw materials forming the network structure of a composite xerogel, a series of structurally intact PTW-doped Al2O3–SiO2 composite xerogel thermal-insulating materials were prepared by the sol–gel method and dried under atmospheric pressure. The infrared spectral characteristics, infrared radiation transmittance, microstructures, morphology and thermal conductivity of different composite materials prepared have been determined by a Fourier transform infrared spectrometer, UV–visible–near-infrared spectrophotometer, X-ray diffractometer, scanning electron microscope and thermal conductivity tester. The results exhibit that when the Al to Si molar ratio is 1 : 9, the composite material with 5 wt% modified PTW shows the best infrared radiation blocking performance and the lowest thermal conductivity (0.0604 W m−1 K−1).
Databáze: Directory of Open Access Journals
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