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Aluminum oxide
Aluminum oxide
Aluminum oxide, also known as activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 square meters/g. The compound is used as a desiccant (to keep things dry by absorbing water from the air) and as a filter of fluoride, arsenic and selenium in drinking water. It is made of aluminium oxide (alumina; Al2O3), the same chemical substance as sapphire and rubies (but without the impurities that give those gems their color). It has a very high surface-area-to-weight ratio. That means it has a lot of very small pores, almost like tunnels, that run throughout it.
Technical specification
|
Test items |
Test data |
Test items |
Test data |
|
Alumina (Al2O3) % |
92-99 |
Specific surface area |
≥300 |
|
Sodium oxide(Na2O)% |
≤1.0 |
Hardness |
≥80 |
|
Static absorption (RH= 60%) |
≥16.8 |
Bulk Density |
0.7-0.8 |
|
Water absorption rate |
≥50 |
Wear Rate |
≤0.6 |
|
Pore volume |
≥0.38 |
Appearance |
White, no toxic, no smell |