β′′-ALUMINA
Beta-alumina Series Products
β″-alumina
β”-alumina (rhombus: R3m) and β-alumina (hexagonal system: P63/mmc) are the two different crystal structures. The chemical composition of β-Al2O3 and β”-Al2O3 and the stacking sequence of oxygen ions between ionic conductive layers are different, β-Al2O3 is Na2O·(8 ~ 11)Al2O3, β”-Al2O3 is Na2O·(5 ~ 7)Al2O3, β-alumina is 2 spinel accumulation, β”-alumina is 3 spinel accumulation. The ionic conductivity of the beta phase is higher than that of the beta phase because it contains more Na+.
As a traditional sodium ion conductor material, NA-β’/β”-Al2O3 is widely used in the membranes and electrolytes of Na/S batteries and solid sodium ion batteries.”
Specification Details
| Typical Properties | Units | β″ | β″M |
|---|---|---|---|
Crystal Structure | β″ ≥ 95% | β″ ≥ 95% | |
Average Particle Size (by Bettersize Laser 9300SE) | D50, um | 1-10 | 1-10 |
Loose Bulk Density | g/cm3 | 0.5-0.6 | 0.5-0.6 |
BET Surface Area | m2/g | - | - |
Purity (Na2O·5.33Al2O3) ≥ | % | 99.99 | - |
Purity (Na1.67Mg0.67Al10.33O17) ≥ | % | - | 99.99 |
Impurity ≤ (by ICP-OES) | |||
Ca | ppm | 5 | 5 |
Mg | ppm | 3 | - |
Fe | ppm | 10 | 10 |
Si | ppm | 30 | 30 |
Ti | ppm | 1 | 1 |
Cu | ppm | 1 | 1 |
Packing (As per customer’s requests) | drum | 25kg | 25kg |
