Jan 6 2004
Background
Porous ceramics can be used as filters and for the controlled release of volatile chemicals. In this material, Alumino-Silicate particles are found in a glassy matrix. The resulting ceramic is used to remove solids from gases and liquids, and liquids such as oil and water from gases.
This grade removes particles down to 30 microns in diameter. It has a high cross breaking strength and so is able to withstand high differential pressure. It is resistant to hot and cold acids, except hydrofluoric acid and acid fluorides, and is also resistant to alkaline solutions up to pH9, as well as hot gases up to 900 °C.
Key Properties
The key properties of Alumino-Silicate are tabulated below.
Table 1. Key properties of Alumino-Silicate
| Chemical Resistance |
| Acids - concentrated |
Fair |
| Acids - dilute |
Good |
| Alkalis |
Good |
| Physical Properties |
| Apparent porosity ( % ) |
45 |
| Density ( g cm-3 ) |
2.65 |
| Refractive index |
1.54 |
| Thermal Properties |
| Coefficient of thermal expansion @ 20-1000 °C ( x10-6 K-1 ) |
5 |
| Upper continuous use temperature ( °C ) |
900 |
About Goodfellow
Goodfellow supplies metals, ceramics and other materials to meet the research, development and specialist production requirements of science and industry worldwide.
.gif)
Source: Goodfellow
For more information on this source please visit Goodfellow.