Pechini법에 의한 Ga 2 O 3 :Eu 3+ 형광체 분말의 제조

박인용; 이종원; 김선태; In Yong Park; Jongwon Lee; Seontai Kim

Korean Journal of Materials Research, Vol.12, No.7, 517-521, July, 2002

DOI10.3740/MRSK.2002.12.7.517 Export Citation

Pechini법에 의한 Ga 2 O 3 :Eu 3+ 형광체 분말의 제조

Preparation of Ga 2 O 3 :Eu 3+ Phosphor by Pechini Method

박인용^†, 이종원, 김선태

한밭대학교 신소재공학부

In Yong Park^†, Jongwon Lee, and Seontai Kim

Dept. of Materials Engineering, Hanbat National University, Daejeon 305-719, Korea

E-mail:

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 γ - Ga 2 O 3 -like phase up to 500 ? C and then transformed into β - Ga 2 O 3 phase above 600 ? C . The powders calcined below 1000 ? 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 ? C .

Keywords:Phosphor;Ga 2 O 3;Europium;Luminescence;Pechini Method

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[5] Miyata T, Nakatani T, Minami T, Thin Solid Films, 373(1-2), 145 (2000)

[6] Geller S, J. Chem. Phys., 33(3), 676 (1960)

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[8] Ryu H, Park HD, Kor. J. Ceram., 3(2), 134 (1997)

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[10] Yang HG, Display Engimeening II, pp.812-827, ChungBum Publishing, Seoul(2000) (2000)

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[16] Pechini M, U.S. Patent No. 3 330 697, (11 July 1967) (1967)

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[18] Roy R, Hill VG, Osborn EF, J. Am. Chem. Soc., 74, 719 (1952)

[19] Sato T, Nakamura T, Thermochim. Acta., 53, 281 (1982)

[20] Gulgun MA, Popoola OO, Kriven WM, J. Am. Ceram. Soc., 77(2), 531 (1994)

[21] Shannon RD, Prewitt CT, Acta. Cryst., 25, 925 (1969)

[22] Schneider SJ, Roth RS, Waring JL, J. Res. Natl. Bur. Stand., 65A(3), 365 (1961)

[23] Babu P, Jayasankar CK, Physica B. Conds. Mater., 279(4), 262 (2000)

[24] Kubota S, Izumi M, Yamane H, Shimada M, J. Alloys Comp., 283(1-2), 95 (1999)