Micro-/macroporous ceramics from preceramic precursors

被引：156

作者：

Schmidt, H ^{[1
]}

Koch, D

Grathwohl, G

Colombo, P

机构：

[1] Univ Bremen, D-28359 Bremen, Germany

[2] Univ Bologna, Dipartimento Chim Appl & Sci Mat, I-40136 Bologna, Italy

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 10期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00997.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：

Porous silicon oxycarbide (SiOC) ceramics in particular bulk and cellular structures are produced via polymer pyrolysis. By using optimal pyrolysis parameters (i.e., heating rate, maximum temperature) the addition of either solid fillers or chemically active additives is efficient in preventing the collapse of pore structure and controlling pore formation through decomposition. Fast pyrolysis can lead to crack formation and a loss of specific surface area at temperatures above 600 degreesC, whereas slow pyrolysis is able to preserve mesopores up to 1200 degreesC combined with high surface areas. These SiOC ceramics with bimodal pore size distribution are potential candidates for adsorption/separation processes under severe conditions.

引用

页码：2252 / 2255

页数：4

共 21 条

[1] PREPARATION OF SILICON CARBONITRIDES FROM AN ORGANOSILICON POLYMER .1. THERMAL-DECOMPOSITION OF THE CROSS-LINKED POLYSILAZANE [J].