Influence of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels

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	Influence of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels
	Huang, WL ; Cui, SH ; Liang, KM ; Gu, SR
刊名	JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
	2001
卷号	62 期号:7 页码:1205
关键词	SOL-GEL SILICA SELF-SIMILARITY AEROGELS MULLITE
ISSN号	0022-3697
通讯作者	Huang, WL: Chinese Acad Sci, Inst Phys, Grp 409, Beijing 100080, Peoples R China.
中文摘要	This investigation deals with the effect of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels prepared via a two-step acid-base-catalyzed sol-gel process with/without alcohol washing before drying. The mesoporosity and surface fractal dimensions are evaluated by image analysis methods, based on FE-SEM (field emission gun-scanning electron microscopy) images. The results show that samples with alcohol washing before drying exhibit finer textures and lower sintering temperature. The mesoporosity increase before 700 degreesC might be attributed to the microporosity reduction during large extent of further condensation (detectable weight loss), and continuous further condensation and sintering resulted in the monotonic decrease of mesoporosity above that temperature. Smoothing and sintering effects also contributed to the general decreasing trend of surface fractal dimensions with increasing temperatures. Complication of surface textures caused by heterogeneous distributions of pores resulted in the abnormal high surface fractal dimensions. (C) 2001 Elsevier Science Ltd. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/39791]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Huang, WL,Cui, SH,Liang, KM,et al. Influence of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2001,62(7):1205.
APA	Huang, WL,Cui, SH,Liang, KM,&Gu, SR.(2001).Influence of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,62(7),1205.
MLA	Huang, WL,et al."Influence of calcining temperature on the mesopore structures and surface fractal dimensions of MgO-Al2O3-SiO2 xerogels".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 62.7(2001):1205.