Preparation, structure and properties of spherical SiO2-Al2O3 composites

被引：3

作者：

Zhao Zhen-Xing

Xia Chun-Gu ^{[1
]}

Xue Qun-Ji

Li Dian-Qing

Liu Peng-Cheng

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem & Phys, Lanzhou 730000, Peoples R China

[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2007年 / 23卷 / 04期

关键词：

spherical SiO2-Al2O3; composite; oil-drop method; armorphous phase; structure and property;

D O I：

10.3866/PKU.WHXB20070419

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Acidic silicon sol was prepared by ion exchange using Na2SiO3 center dot 9H(2)O as raw material. Spherical SiO2-Al2O3 composites were prepared by oil-drop method after mixing of silicon sol, hexamethylenetetramine, and aluminium sol. The samples were characterized and analysized by XRD, BET, and TPD. The results showed that SiO2 existed in SiO2-Al2O3 composites in amorphous phase and that specific surface area, pore volume, and surface acidity increase with the increase of SiO2 content, accompanied with the decrease of average pore diameter and bulk density. The crash strength kept approximate constant.

引用

页码：549 / 553

页数：5

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