Ceramic membranes from reaction-sintered silicon nitride on nitride and oxide substrates

被引：1

作者：

Antsiferov, VN ^{[1
]}

Gilev, VG ^{[1
]}

机构：

[1] Res Inst Problems Powder Technol & Coats, Perm, Russia

来源：

REFRACTORIES AND INDUSTRIAL CERAMICS | 1998年 / 39卷 / 11-12期

关键词：

Silicon Nitride; Oxide Substrate; Ceramic Membrane; Glass Ceramic Material; Maximum Pore Size;

D O I：

10.1007/BF02771352

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：

The gas permeability and pore sizes in membranes and porous materials from reaction-sintered silicon nitride (RSSN) are studied. The substrates for the RSSN membranes are highly porous (80% pores) silicon nitride with pores 50 - 80 mu m in size and alumina-based ceramics with pores about 10 mu m in diameter. Silicon powder with a specific surface of 1.4 g/cm(2) is deposited onto the substrates in the form of an aqueous dispersion by various methods including filtering and sintered in nitrogen at 1300 - 1400 degrees C. The main difficulty of the process is in preventing the formation of defects at the places where the largest channel pores reach the surface of the substrate. Membranes with 0.5 - 1 mu m pores can be obtained on both types of substrate after a single deposition.

引用

页码：440 / 443

页数：4