Characterization of multi-phase aerogels by contrast-marching SANS

被引：13

作者：

Merzbacher, CI ^{[1
]}

Barker, JG

Swider, KE

Ryan, JV

Bernstein, RA

Rolison, DR

机构：

[1] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA

[2] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] USN, Res Lab, Div Chem, Washington, DC 20375 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 225卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

small-angle neutron scattering (SANS); aerogel; oxidation; contrast matching;

D O I：

10.1016/S0022-3093(98)00044-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Contrast-matching small-angle neutron scattering (SANS) has been used to independently characterize the structures of two-phase aerogels consisting of a metal oxide supported on silica aerogel. Ru oxide was formed on silica aerogel by oxidation at 400 degrees C of ruthenocene, impregnated from the vapor phase, or Ru(III)acetylacetonate, impregnated via an acetone solution. Fe oxide was formed by vapor-phase impregnation of ferrocene, followed by reduction at 400 degrees C and exposure to ambient air. The Ru oxide forms particles several tens of nanometers in diameter in the aerogel mesopores. The Fe oxide forms a coating which mimics the structure of the support. The silica aerogel structure is not affected by the deposition and heat treatment processes. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：234 / 238

页数：5

共 16 条

[1] Preparation of nanocomposite materials containing WS2, delta-WN, Fe3O4, or Fe9S10 in a silica aerogel host [J].