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用碳酸盐作沉淀剂,采用无机体系共沉淀法制备了钆镓石榴石Gd3Ga5O12(GGG)前驱体.由TG-DTA和IR光谱分析表明,合成的沉淀为碱式碳酸盐,煅烧过程中失重为28.06%.XRD分析表明在1000℃煅烧3h可以得到晶化完全的GGG多晶料,通过与固相反应比较可知,碳酸盐共沉淀法制备GGG多晶料具有反应时间短、晶化程度高、煅烧温度低、Ga2O3挥发量少等优点.GGG晶体提拉生长表明,Gd2O3和Ga2O3的组分失配问题已经得到基本解决,从而大大提高了单晶的光学质量.

Gd3Ga5O12 (GGG) precursor was synthesized by a co-precipitation method using ammonium
hydrogen carbonate as precipitator. TG-DTA and IR spectra indicated that the precursor was alkaline and the weight loss during calcination was
28.06%. The results of XRD analysis indicated that the polycrystalline powder was well-crystallized after calcination at 1000℃C for 3h.
Compared with the solid-state reaction, the carbonate co-precipitation had the merits of short reaction period, well-crystallization, low calcining
temperature, and less volatilization. As a result, the volatilization and disproportion of Gd2O3 and Ga2O3 could be well controlled
during crystal growth and the optical quality of single crystal was also improved.

参考文献

[1] Pardavi-Horvath M. prog et al. Crystal Growth Charact., 1982, 5: 175--220.
[2] Zur A, McGill T C, et al. J. Appl. Phys., 1984, 55 (2): 378--386.
[3] Keszei B, Paitz J, Vandlik J, et al. J. Crystal Growth, 2001, 226: 95--100.
[4] 张庆礼, 殷绍唐, 王爱华, 等. 量子电子学报, 2002, 19 (6): 481--484.
[5] Hellstrom E E, et al. J. Am. Ceram. Soc., 1989, 72 (8): 1376--1380.
[6] Zhao Guangjun, et al. Journal of Inorganic Materials, 2002, 17 (3): 443--447.
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