Abstract
A basic principle for selecting inorganic sealing materials for dense ionic-conducting ceramic membranes is described for high temperature permeation/reaction experiments. Based on this principle ceramic-glass composite seals consisting of the Pyrex glass and the ceramic powder of the membrane were developed and successfully used to seal a number of different dense ceramic membranes at high temperatures. The ceramic-glass composite seal is typically composed of 40-50wt.% membrane material powder, 20-50wt.% Pyrex glass and 5-20wt.% additive such as sodium aluminate and boron oxide. The properties of ceramic-glass composite seal can be tailored to obtain suitable wettability, viscosity, chemical inertness, thermal expansibility, and bonding strength for good sealing results. A success rate for sealing these ceramic membranes of nearly 100% is possible using the ceramic-glass composite recipe if the correct sealing procedure, including seal paste preparation, is carefully followed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 185-193 |
| Number of pages | 9 |
| Journal | Journal of Membrane Science |
| Volume | 193 |
| Issue number | 2 |
| DOIs | |
| State | Published - Nov 15 2001 |
| Externally published | Yes |
Keywords
- Ceramic membranes
- High temperature permeation
- Ionic-conducting
- Sealing
ASJC Scopus subject areas
- Biochemistry
- General Materials Science
- Physical and Theoretical Chemistry
- Filtration and Separation