Determination of surface area and porosity of sol-gel derived ceramic powders in the system TiO2-SiO2-Al2O3

被引：29

作者：

Khalil, T

Abou El-Nour, F

El-Gammal, B

Boccaccini, AR

机构：

[1] Tech Univ Ilmenau, Inst Werkstofftech, D-98684 Ilmenau, Germany

[2] Atom Energy Author, Hot Labs Ctr, Cairo, Egypt

来源：

POWDER TECHNOLOGY | 2001年 / 114卷 / 1-3期

关键词：

ceramic powders; surface area; BET equation; sol-gel technique; nano-powders;

D O I：

10.1016/S0032-5910(00)00271-0

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The surface characteristics of ternary ceramic powders in the system TiO2-SiO-Al2O3 prepared by a sol-gel technique were studied through nitrogen gas adsorption at liquid nitrogen temperature and application of the Brunauer-Emmett-Teller (BET) equation. The total surface area, total pore volume and pore radius of the powders were calculated through the construction of plots relating the amount of nitrogen gas adsorbed V-1 and the thickness of the adsorbed layer t (V-1 - t plots). These results permitted the detection of the different types of pores present in the samples. In a first approximation, the V-1 - t plots seem to demonstrate the correctness of the results obtained for the total specific area of the investigated samples. The influence of thermal treatment (drying, calcination) on the surface characteristics of the investigated powders was assessed. (C) 2001 Elsevier Science S.A. All rights reserved.

引用

页码：106 / 111

页数：6

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