Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Ga2O3:Eu3+ Phosphor by Pechini Method

Pechini법에 의한 Ga2O3:Eu3+ 형광체 분말의 제조

  • Park, In-Yong (Department of Materials Engineering, Hanbat National University) ;
  • Lee, Jong-Won (Department of Materials Engineering, Hanbat National University) ;
  • Kim, Seon-Tai (Department of Materials Engineering, Hanbat National University)
  • Published : 2002.07.01
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Abstract

Europium-activated $Ga_2$$O_3$ phosphor powders were prepared by Pechini method from the mixed aqueous solutions of gallium(III) nitrate, europium(III) nitrate, ethylene glycol and citric acid. The phase formation process and particle shape of the powders obtained were investigated by means of TG/DTA, XRD and SEM. It was found that the powders were amorphous or ${\gamma}$-$Ga_2$$O_3$-like phase up to $500^{\circ}C$ and then transformed into $\beta$- $Ga_2$$O_3$ phase above $600 ^{\circ}C$. The powders calcined below $1000^{\circ}C$ were spherical and nanometer-sized. Photoluminescence spectra measured at room temperature showed that the highest luminescence intensity was obtained for the sample synthesized under the conditions of 2 mol% Eu concentration and heat treatment at $1000^{\circ}C$.

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