PHOSPHOR MICROPARTICLE AND METHOD FOR MANUFACTURING THE SAME

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PROBLEM TO BE SOLVED : To manufacture a yttria microparticle which can be utilized as a red phosphor and does not need a high-temperature treatment, and has a high crystallinity and a particle diameter of ≤100 nm, and in which a luminescence center metal ion is dissolved as a solid solution. SOLUTION : A mixed aqueous solution of ions of a rare earth metal such as europium and yttrium ions is adjusted to a pH of ≥8 using an alkali aqueous solution, and hydrothermally reacted at 360 to 500°C in a short time to thereby manufacture a rare earth metal ion-dissolved yttria solid solution microparticle having a primary particle diameter of ≤100 nm and a high crystallinity degree. COPYRIGHT : (C)2012, JPO&INPIT