热液循环
钇
透射电子显微镜
水热合成
扫描电子显微镜
相(物质)
形态学(生物学)
材料科学
微观结构
化学工程
核化学
六方晶系
硝酸盐
矿物学
氧化物
结晶学
纳米技术
化学
冶金
有机化学
复合材料
地质学
工程类
古生物学
作者
Ying Wang,Guoqing Zhao,Yuan Li
出处
期刊:Advanced Materials Research
日期:2011-02-01
卷期号:189-193: 1275-1279
标识
DOI:10.4028/www.scientific.net/amr.189-193.1275
摘要
The crystalline phase and morphology of the products formed during the synthesis of yttrium oxide via the hydrothermal treatment yttrium nitrate were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. Products with high OH/NO 3 ratios are formed with the increasing of hydrothermal treatment. The crystalline phases are evolved from Y 2 (OH) 5.14 (NO 3 ) 0.86 •H 2 O toY 4 O(OH) 9 (NO 3 ) and finally Y(OH) 3 . The hydrothermal reaction conditions play an important role in the synthesis of the microstructures. Results show the particle size and final morphology of samples could be controlled by reaction temperature, reaction time, and OH - concentration. Sheets, hexagonal and needle-like Y 2 O 3 powders are obtained with the hydrothermal treatment of yittrium nitrate at 180 oC to 200oC for 2-8 hours at pH 9-13.
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