Sodium Beta Alumina Solid Electrolyte Powder, 99.9% Purity, 1um Size
High purity sodium beta alumina solid electrolyte (BASE) is a fast sodium ion conductor material. β''-Al2O3 is an isomorphic form of aluminium oxide (Al2O3) polycrystalline ceramic. It is prepared as a solid electrolyte when it is complexed with sodium ion (Na+). Sodium beta-alumina is a good sodium ion conductor and yet does not allow electronic conductivity. Therefore, it is well suited as a solid electrolyte for several types of electrochemical cells.
Product Name: sodium beta" alumina, sodium aluminate
Product Number: PO0425
Chemical Formula: NaAl5O8, Na2O·5Al2O3 (β′′-alumina)
CAS Number: 11138-49-1
Molecular Weight: 285.89 g/mol (NaAl5O8)
Particle Size: approximately 1 micron (1 um) average particle size
Purity: Synthesized from >99.9% high purity precursor materials
Sintering Temperature of sodium beta alumina powder: above 1600 degrees Celsius with ~15-30min dwell time at temperature for sintering of ceramics
Sodium ionic conductivity: 5~10 x 10-2 S/cm at 300 degrees Celsius in the sintered ceramics form.
XRD of sodium beta alumina powder from MSE Supplies
Particle Size Distribution (PSD) of beta alumina powder from MSE Supplies
Sodium beta alumina is a non-stoichiometric sodium aluminate known for its rapid transport of Na+ ions. This material selectively passes sodium ions while blocking other species, including liquid sodium and liquid sulfur. It is a ceramic which can be formed and sintered by commercially available techniques and its conductivity at operating temperatures from 250 to 300 degrees Celsius – compares favorably with electrolytes used in conventional battery systems such as sulfuric acid and potassium hydroxide. The crystal structure of the Na-Al2O3 provides an essential rigid framework with channels along which the ionic species of the solid can migrate. Ion transport involves hopping from site to site along these channels.
Sodium-beta alumina electrochemical cells (batteries) have been extensively studied since the 1960s. A battery based on the use of sodium beta alumina solid electrolyte is composed of an anode, typically molten sodium, and a cathode that can be molten sulfur (Na-S battery) or a transition metal halide incorporated with a liquid phase secondary electrolyte (e.g., ZEBRA battery or sodium nickel chloride battery). In most cases the electrolyte is a dense solid β″-Al2O3 sodium ion-conducting membrane.