Method for manufacturing same

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PROBLEM TO BE SOLVED : To provide a method for producing a luminant having a luminescence center which consists of a rare earth element and is introduced into alumina; and a luminant produced thereby. SOLUTION : The method for producing the luminant, of which the host crystal is α-alumina and the luminescent center is a rare earth element, uses a sol-gel method and comprises the following : a hydrolysis step for hydrolyzing an organometallic compound of aluminum, a colloidal solution formation step for converting a hydrolyzate yielded by the hydrolysis step into a colloidal solution, a step for adding the rare earth element, a wet alumina gel formation step for converting the colloidal solution into a wet alumina gel, a dry alumina gel formation step for converting the wet alumina gel into a dry alumina gel, and a firing step for firing the dry alumina gel in a vacuum atmosphere, in an inert gas atmosphere, or in a reducing gas atmosphere. Under ultraviolet ray excitation, the luminant emits light of red, blue, green, or the like efficiently. COPYRIGHT : (C)2005, JPO&NCIPI