FORMATION AND PORE STRUCTURE OF BORON-NITRIDE AEROGELS

被引：51

作者：

LINDQUIST, DA

BOREK, TT

KRAMER, SJ

NARULA, CK

JOHNSTON, G

SCHAEFFER, R

SMITH, DM

PAINE, RT

机构：

[1] UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131

[2] UNIV NEW MEXICO,NSF CTR MICROENGN CERAM,ALBUQUERQUE,NM 87131

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 03期

关键词：

boron nitride; formation; gels; microstructure; processing;

D O I：

10.1111/j.1151-2916.1990.tb06588.x

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：

Gels containing a poly(borazinyl amine) and tetrahydrofuran were processed by CO2 supercritical drying techniques followed by pyrolysis. The resulting BN ceramic aerogels are highly porous, and the microstructure, porosity, and surface area characteristics have been examined. The aerogels show excellent thermal stability exhibiting surface areas in excess of 350 m2/g and porosities greater than 0.8 even when heated in argon at 1500°C for 8 h. By removing solvent via evaporation before supercritical drying, the mean pore radius can be varied between 3.6 and 10 nm. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：757 / 760

页数：4

共 14 条

[1] METALLIC AEROGELS - A NOVEL SYNTHESIS OF VERY FINE COPPER-POWDER [J].