Study of sol structure by SAXS

	Study of sol structure by SAXS
	Li, ZH; Sun, JH; Zhao, JP; Wu, D; Sun, YH; Liu, Y; Sheng, WJ; Dong, BZ; Liu Y(柳义); Sheng WJ(生文君)
刊名	ACTA PHYSICA SINICA
	2000
卷号	49 期号:4 页码:775-780
其他题名	用小角X射线散射法研究溶胶结构
通讯作者	Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Natl Synchrotron Radiat Lab, Beijing 100039, Peoples R China
英文摘要	SiO2 and ZrO2 sols were prepared by base-catalyzed hydrolysis and condensation of alkoxides In alcohol. PEG and diglycol were used as organic modifiers of SiO2 and ZrO2 sols respectively. The structure evolution during the sol-gel process was investigated by small angle X-ray scattering (SAXS) with synchrotron radiation as X-ray source. SAXS results show that the silica and zirconic sols are polydispersed, i.e., with proper size distribution. SAXS results also show that silica and zirconic aggregates are mass fractals, fractal dimensions span the regime 0.23-2.56 corresponding to very sparse and more branched and compact structures. The formation of a mass fractal is a kind of nonlinear process. Both RLCA and Eden models dominate the kinetic growth under base-catalyzed condition. it is also shown that the SAXS profiles do not agree with Pored's law and have negative or positive slopes, suggesting that the dispersive interfacial layer exists between sol particle and dispersing agent. The thickness of the interfacial layer falls between approximately 1.00 and 22.00 MI for samples prepared under various conditions. Both agreement with and deviation from Pored's law in SAXS are summarized, especially proposing the analysis method upon positive deviation with slit-smeared SAXS data.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000086548700034
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238466]
专题	高能物理研究所_多学科研究中心高能物理研究所_加速器中心高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, ZH,Sun, JH,Zhao, JP,et al. Study of sol structure by SAXS[J]. ACTA PHYSICA SINICA,2000,49(4):775-780.
APA	Li, ZH.,Sun, JH.,Zhao, JP.,Wu, D.,Sun, YH.,...&董宝中.(2000).Study of sol structure by SAXS.ACTA PHYSICA SINICA,49(4),775-780.
MLA	Li, ZH,et al."Study of sol structure by SAXS".ACTA PHYSICA SINICA 49.4(2000):775-780.