Preparation and properties of polycrystalline divalent-cation β″-alumina☆
Abstract Using ion exchange from an appropriate molten salt, the divalent cations Ca, Sr, Ba, Zn, Cd, Sn and Pb have been substituted for Na in polycrystalline Li 2 O-stabilized Na-β″-alumina samples. The Ca-, Sr-, and Cd-β″ alumina specimens were dense, crack-free bodies. Preparation procedures for the substitutions, lattice parameters for the substituted structure, and Raman spectra are given for the various divalent-cation β″-aluminas. Raman data aided in determining whether or not exchange of one ion by another had occured.