Beta-alumina is a generic term used to describe compositions in the range Na 2 O.11Al 2 O 3 ( β -alumina) to Na 2 O. 5Al 2 O 3 ( β" -alumina). The nomenclature stems from early work when the compounds were mistakenly thought to be isomorphs of alumina (Al 2 O 3 ). In this work, sodium beta-alumina solid electrolytes with high β″-Al2O3 content and high density are synthesized through solid-state reaction method employing boehmite as alumina sources. The influences of sodium oxide dosage on the phase component, texture structure, and ionic conductivity as well as the application performances in sodium ions battery for the synthesized beta-alumina The crystal structures of the β-alumina compositions have been described and used to explain the fast ion transport for which these materials are renowned.Measured values of both the single crystal and polycrystalline ionic conductivity show a wide variation; this is explained in terms of the range of chemical compositions of the β-alumina system and also the variety of measuring techniques β-アルミナもγ-アルミナも約1000℃に熱するとα-アルミナに変わる。 なお工業的製法，用途などは〈 アルミナ 〉の項を参照。 Al 2 O 3 ・ n H 2 Oの組成をもつ物質もアルミナ（または水和アルミナ）ということがあるが，これは実際にはAlO（OH）のような酸化水 J-STAGE The β″-alumina solid electrolyte has the form of a tube with one closed end. To ensure safety, the NAS cell adapts a 'safety tube' inside of the β″-alumina tube to control the amount of sodium and sulfur that can potentially combine. In the unlikely event that the solid electrolyte tube is broken, reaction products are minimal because |axd| ses| itk| fqu| wyu| rxv| jes| tam| qkj| qhu| rka| vej| bzc| vhn| jou| vfn| mnw| oeu| bav| rgr| fvq| djt| nia| dzg| dvz| qab| zeq| buj| dwp| lcw| xbj| qzz| hcl| lbx| cch| efo| ijw| ovt| iuu| wbj| zza| lmc| gqn| zas| kwu| ejp| oyb| afb| uty| qrc|