옥살산을 이용한 Y2O3 분말제조와 특성 평가

손보영; 정미원; Boyoung Son; Miewon Jung

Korean Journal of Materials Research, Vol.21, No.8, 444-449, August, 2011

DOI10.3740/MRSK.2011.21.8.444 Export Citation

옥살산을 이용한 Y2O3 분말제조와 특성 평가

Evaluations of Y2O3 Powder Synthesized Using Oxalic Acid

손보영, 정미원^†

성신여자대학교 생명과학·화학부/기초과학연구소

Boyoung Son, and Miewon Jung^†

School of Biological Sciences and Chemistry/Institute of Basic Science, Sungshin Womens Univ., Seoul 136-742, Korea

E-mail:

Nano-sized Y2O3 powders were prepared via a sol-gel method starting with Y(NO3)3·6H2O (Yttrium(III) nitrate hexahydrate) and water with ethanol as a cosolvent. Y2O3 is an important rare earth oxide and has been considered for use in nuclear applications, such as ceramic materials, due to its excellent optical and refractory characteristics. It has been used as a chemically stable substrate, a crucible material for melting reactive metals, and a nozzle material for jet casting molten rare earth-iron magnetic alloys. Oxalic acid (C2H2O4) has been adopted as a chelating agent in order to control the rate of hydrolysis and polycondensation, and ammonia was added in order to adjust the base condition. The synthesized Y2O3 powder was characterized using TG/DTA, XRD, FE-SEM, BET and Impedance Analyzer analyses. The powder changed its properties in accordance with the pH conditions of the catalyst. As the pH increases according to the FE-SEM, the grain grew and it showed that the pore size decreased while confirming the effect of the grain size. The nano-material Y2O3 powders demonstrated that the surface area was improved with the addition of oxalic acid with ammonium hydroxide.

Keywords:Y2O3;oxalic acid;sol-gel method

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[2] Xu G, Zhang YW, Liao CS, Yan CH, J. Am. Ceram. Soc., 87(12), 2275 (2004)

[3] Ikegami T, Li JG, Mori T, Moriyoshi Y, J. Am. Ceram. Soc., 85(7), 1725 (2002)

[4] Ismail HM, Hussein GA, Powder Technol., 87(1), 87 (1996)

[5] Lee JK, Kang HH, Hwang Y, Kwak HS, Lee WS, Korean J. Mater. Res., 7(5), 411 (1997)

[6] Li Y, Lin X, Wang Y, Luo J, Sun W, J. Rare Earths, 24, 34 (2006)

[7] Tropf WJ, Thomas ME, Handbook of Optical constants of Solids - Vol. 2, p. 1079, ed. Palik ED, Academic Press, USA (1991). doi:10.1016/B978-012544415-6.50096-0. (1991)

[8] Mirjalili F, Hasmaliza M, Abdullah LC, Ceram. Int., 36, 1253 (2010)

[9] Yilmaz S, Kutmen-Kalpakli Y, Yilmaz E, Ceram. Int., 35(5), 2029 (2009)

[10] Leleckaite A, Kareiva A, Opt. Mater., 26, 123 (2004)

[11] Brinker CJ, Scherer GW, Sol-Gel Science, p. 22, Academic Press, San Diego, CA (1990). (1990)

[12] Dupont A, Parent C, Le Garrec B, Heintz JM, J. Solid State. Chem., 171, 152 (2003)

[13] Hao YJ, Lai QY, Lu JZ, Wang HL, Chen YD, Ji XY, J. Power Sources, 158(2), 1358 (2006)

[14] Park JH, Chung SC, Oh C, Shin SI, Im SS, Oh SG, J. Korean Ind. Eng. Chem., 13(6), 502 (2002)

[15] De Boer JH, in proceedings of the tenth symposium of the Colston Research Society (London, UK, March 1958) ed. Everett DH, Stone FS (Academic Press, New York, USA, 1959) P.58. (1959)