Method for preparing calcium aluminate film containing oxygen radical and laminate

摘要

C₁₂A₇ containing oxygen radicals at a high concentration, is provided at a low cost. A method for preparing an oxygen radical-containing calcium aluminate film, characterized in that it comprises subjecting a powder of oxygen radical-containing calcium aluminate to thermal spraying, and preferably the oxygen radical content in the oxygen radical-containing calcium aluminate is at least 10²⁰ cm^-3.