PROBLEM TO BE SOLVED: To provide an illuminant having a wide width of an emission spectrum and high emission intensity.SOLUTION: A method for producing the illuminant includes a step for preparing a starting raw material including porous silica 300 in which pores 314 are formed and subjecting the prepared starting raw material to prescribed treatment to chemically modify inner surfaces of the pores 314. The prescribed treatment is e.g. wet oxidation treatment and is performed by disposing the porous silica in a center of a region (a heating part) enclosed by a heater 220 of a chamber 210 and supplying an inert gas in a wet state into the chamber.COPYRIGHT: (C)2011,JPO&INPIT【課題】発光スペクトル幅が広く発光強度が強い発光体の提供。【解決手段】細孔314が形成された多孔質シリカ300を含む出発原料を準備し、準備された出発原料に所定の処理を行って、細孔314の内面を化学修飾する工程を備える発光体の製造方法。所定の処理は、例えば湿式酸化処理であり、チャンバ210のヒーター220に取り囲まれた領域(加熱部)の中心に多孔質シリカを配置し、湿潤状態の不活性ガスをチャンバ内に供給することにより行われる。【選択図】図1
