The chemical transformation of single-crystal α-Al2O3 platelets to β″-Al2O3
Abstract Single-crystal Na-β″-Al2O3 micro-platelets have been prepared by heating α-Al2O3 platelets in an alkali-containing atmosphere. The α-Al2O3-to-Na-β″-Al2O3 transformation rate and the development of microstructure have been studied. Preliminary results on the preparation of K-β″-Al2O3 are also given.