摘要
ACCORDING to Tanabe’s definition, all materials possessing the basic strength （H-） over 26.5 are superbases. However, most of superbases known up to now, including CaO and SrO evacuated at 1173 K, K or Na metal supported on KOH/γ-Al<sub>2</sub>O<sub>3</sub>, etc. are extremely sensitive to CO<sub>2</sub> or H<sub>2</sub>O in the atmosphere, which limits their application in industrial scale. In or-
