Beta-ALUMINA

β′′-alumina Series Products

β″-alumina

Beta-alumina / β″-Al2O3

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-alumina is Na2O·(8 ~ 11)Al2O3, β″-alumina 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.

At present, our company can provide with two grades of  β″-alumina products, B-D2 and BM-D2.

Specification Details
Typical Properties Units B-D2 BM-D2
Crystal Phase (β") ≥
%
95
95
Average Particle Size
(by Bettersize Laser 9300SE)
D50, um
1-3
1-3
Loose Bulk Density
g/cm3
0.4-0.6
0.4-0.6
BET Surface Area
m2/g
5-15
5-15
Purity (Na2O·5Al2O3) ≥
%
99.99
-
Purity (Na1.67Mg0.67Al10.33O17) ≥
%
-
99.99
Impurity ≤ (by ICP-OES)
Ca
ppm
20
20
Mg
ppm
3
-
Cu
ppm
3
3
Fe
ppm
10
10
Si
ppm
30
30
Packing
(As per customer’s requests)
drum
25kg
25kg
β″-Alumina XRD