Fabrication of Ce-doped Gd3(Al, Ga)5O12 Powders Using Co-precipitation Method

doi:10.15541/jim20160075

Abstract

Abstract:

Ce-doped Gd₃(Al,Ga)₅O₁₂ (GAGG) precursors were co-precipitated from a mixed solution of gadolinium, aluminum and gallium nitrates using ammonium hydroxide as precipitant. and then characterized by TG/DTA analysis. GAGG powders were obtained by calcining the precursors at 800℃, 850℃, 900℃, 1000℃, 1100℃ and 1200℃. Phase evolution of GAGG powders were investigated by XRD analysis which showed that a pure GAGG phase was obtained. SEM observation demonstrated that the obtaimed poovders were mainly amorphous with size mainly about 100-150 nm in diameter. PL spectra of GAGG powders showed strong emission around 560 nm. The highest transparency of as prepared ceramic was obtained when GAGG powders were calcined at 900℃.

Key words: Gd₃(Al,Ga)₅O₁₂ ceramic, co-precipitation, calcination, inorganic scintillator

CLC Number:

TQ174

ZHANG Ye, CHEN Xian-Qiang, QIN Hai-Ming, LUO Zhao-Hua, JIANG Jun, JIANG Hao-Chuan. Fabrication of Ce-doped Gd₃(Al, Ga)₅O₁₂ Powders Using Co-precipitation Method[J]. Journal of Inorganic Materials, 2016, 31(10): 1151-1156.

Figures/Tables 7

Fig. 1 TG/DTA curve of GAGG:Ce precursors

Fig. 2 XRD patterns of GAGG:Ce powders calcined at different temperatures (a) 800℃; (b) 850℃; (c) 900℃; (d) 1000℃; (e) 1100℃; (f) 1200℃

Fig. 3 IR spectra of GAGG:Ce precursors and powders calcined at different temperatures (a) Precursors; (b) 800℃; (c) 850℃; (d) 900℃; (e) 1000℃; (f) 1100℃; (g) 1200℃

Fig. 4 SEM morphologies of GAGG:Ce precursors and powders calcined at different temperatures (a) Precursors; (b) 800℃; (c) 850℃; (d) 900℃; (e) 1000℃; (f) 1100℃; (g) 1200℃

Fig. 5 PLE spectra of GAGG:Ce powders calcined at different temperatures (a) 850℃; (b) 900℃; (c) 1000℃; (d) 1100℃; (e) 1200℃

Fig. 6 PL spectra of the GAGG:Ce powders calcined at different temperatures (a) 850℃; (b) 900℃; (c) 1000℃; (d) 1100℃; (e) 1200℃; (f), (g) Simulated curve

Fig. 7 Photograph of GAGG:Ce ceramics made from powders calcined at different temperatures and sintered at 1650℃ for 2 h in oxygen atmosphere (a) 850℃; (b) 900℃; (c) 1000℃; (d) 1100℃; (e) 1200℃

References 24

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Fabrication of Ce-doped Gd₃(Al, Ga)₅O₁₂ Powders Using Co-precipitation Method

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