CERAMIC POWDER MATERIAL, METHOD FOR PRODUCING CERAMIC POWDER MATERIAL, AND BATTERY

A ceramic powder material which contains an LLZ-based garnet-type compound represented by LiAlLaZrO(where x satisfies 0≤x≤0.3) and in which a main phase of a crystal phase undergoes phase transition from a tetragonal phase to a cubic phase in the process of raising a temperature from 25° C. to 1050° C. and the main phase is the cubic phase even after the temperature is lowered to 25° C.