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SiO2气凝胶薄膜常压制备与强化研究

WU Guang-mingLu HongyanWang YuShen JunZhou BinZhang Qin-YuanDeng Zhong-Sheng同济大学波耳固体物理研究所,上海200092

2002Acta Physica SinicaEconomics, Econometrics and Finance被引 3开放获取

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摘要

Scratch resistantsilicaaerogelfilmswitha 77%porosityand 1 . 1 2refractiveindexatambientpressureisreportedusingtheexchangeofsolventandmodificationof—CH3 group.Thesilicafilmswerepreparedinasol gelprocessbyadip coatingmethod ,andthenwerepostannealedinairandamixedgasatmosphere.Thefilmswerecharacterizedwithtransmissionelectronmicroscope,scanningelectronmicroscope,FourierTransforminfraredspectroscope,anellipsometer,andtheabrasiontest,respectively.Withthepostannealing,thefrequencyshiftofFTIRabsorptionω4(TO3 )peakofthefilmstoalowerwavenumberresultsfromadecreaseintheaverageSi—O—Sibridgingangle.Anincreaseinthefullwidthathalf maximum (FWHM)oftheω4peakisascribedtoawidedistributionofthebridginganglebecauseoftheformationofstrainedSi—O—Sibondscausedbythepostannealing.Theabrasionandadhesiontestsindicatethatthemixedgastreatmentnoticeablystrengthensthesilicanetwork .TheincreaseinstrengthisattributedtomoreSi—O—Sibondcross linkagesbetweensilicaparticlesformedbythemixedgastreatment.

引用本文(GB/T 7714)

WU Guang-ming, Lu Hongyan, Wang Yu, 等. SiO2气凝胶薄膜常压制备与强化研究[J]. Acta Physica Sinica, 2002.

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DOI:https://doi.org/10.7498/aps.51.104

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