침전제의 종류 및 침전 공정의 변화가 β-Ga2O3 분말 합성에 미치는 영향

황수현; 최영종; 고정현; 김태진; 전덕일; 조우석; 한규성; Su Hyun Hwang; Young Jong Choi; Jeong Hyun Ko; Tae Jin Kim; Deok Il Jeon; Woo Suk Cho; Kyu Sung Han

Korean Journal of Materials Research, Vol.24, No.4, 214-220, April, 2014

DOI10.3740/MRSK.2014.24.4.214 Export Citation

침전제의 종류 및 침전 공정의 변화가 β-Ga2O3 분말 합성에 미치는 영향

Effect of Precipitants and Precipitation Conditions on Synthesis of β-Ga2O3 Powder

황수현^†, 최영종, 고정현, 김태진, 전덕일, 조우석¹, 한규성¹

(주)티에스엠
¹한국세라믹기술원

Su Hyun Hwang^†, Young Jong Choi, Jeong Hyun Ko, Tae Jin Kim, Deok Il Jeon, Woo Suk Cho¹, and Kyu Sung Han¹

TSM Co.Ltd, Gumi 730-030, Korea
¹KICET, Icheon 467-843, Korea

E-mail:

In this research, a precipitation method was used to synthesize β-Ga2O3 powders with various particle morphologies and sizes under varying precipitation conditions, such as gallium nitrate concentration, pH, and aging temperature, using ammonium hydroxide and ammonium carbonate as precipitants. The obtained powders were characterized in detail by XRD, SEM, FT-IR, and TG-DSC. From the TG-DSC result, GaOOH phase was transformed to β-Ga2O3 at around 742 oC, and weight loss percent was about 14 % when NH4OH was used as a precipitant. Also, β-Ga2O3 formed at 749 oC and weight loss percent was about 15 % when (NH)2CO3 was used as a precipitant. XRD results showed that the obtained Ga2O3 had pure monoclinic phase in both cases. When (NH)2CO3 was used as a precipitant, the particle shape changed and became irregular. The range of particle size was about 500 nm - 4 μm based on various concentrations of gallium nitrate solution with NH4OH. The particle size was increased from 1-2 μm to 3-4 μm and particle shape was changed from spherical to bar type by increasing aging temperature over 80 oC.

Keywords:GaOOH;β-Ga2O3;ammonium hydroxide;ammonium carbonate;calcination

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[2] Sharma S, Sunkara MK, J. Am. Chem. Soc., 124(41), 12288 (2002)

[3] Sato T, Nakamura T, Thermochim. Acta., 53(3), 281 (1982)

[4] Laubengayer AW, Engle HR, J. Am. Chem. Soc., 61(5), 1210 (1939)

[5] Roy R, Hill VG, Osborn EF, J. Am. Chem. Soc., 74(3), 719 (1952)

[6] Fleischer M, Hollbauer L, Born E, Meixner H, J. Am. Ceram. Soc., 80(8), 2121 (1997)

[7] Gao YH, Bando Y, Sato T, Zhang YF, Gao XQ, Appl. Phys. Lett., 81(12), 2267 (2002)

[8] Zhang J, Jiang FH, Yang YD, Li JP, J. Phys. Chem. B, 109(27), 13143 (2005)

[9] Fu L, Liu YQ, Hu P, Xiao K, Yu G, Zhu DB, Chem. Mater., 15(22), 4287 (2003)

[10] Tas AC, Majewski PJ, Aldinger F, J. Am. Chem. Soc., 85(6), 1421 (2002)

[11] Ogita M, Saika N, Nakanishi Y, Hatanaka Y, Appl. Surf. Sci., 142(1-4), 188 (1999)

[12] Weh T, Frank J, Fleischer M, Meixner H, Sens. Actuators B., 78(1-3), 202 (2001)

[13] Nakagawa K, Kajita C, Okumura K, Ikenaga N, Nishitani-Gamo M, Ando T, Kobayashi T, Suzuki T, J. Catal., 203(1), 87 (2001)

[14] Petre AL, Auroux A, Gelin P, Caldararu M, Ionescu NI, Thermochim. Acta., 379(1), 177 (2001)

[15] Xu BJ, Zheng B, Hua WM, Yue YH, Gao Z, J. Catal., 239(2), 470 (2006)

[16] Rambabu U, Munirathnam NR, Prakash TL, Vengalrao B, Buddhudu S, J. Mater. Sci., 42(22), 9262 (2007)

[17] Ristic M, Popovic S, Music S, Mater.. Res. Lett., 59(10), 1227 (2005)

[18] Zhang J, Liu Z, Lin C. Lin J, J. Cryst. Growth, 280(1-2), 99 (2005)

[19] Kurokawa H, Mater. Sci. Eng., 202(1-2), 201 (1995)