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Fabrication of Graded Density SiO2 Aerogel via Sol-Co-Gelation Techniques
GUI Jiayin, ZHOU Bin, ZHONG Yanhong, DU Ai, SHEN Jun
ACTA AERONAUTICAET ASTRONAUTICA SINICA . 2011, (5): 941 -947 .  DOI: CNKI:11-1929/V.20101213.1757.012