生长条件对锗酸锶纳米线形成的影响

Effect of Growth Conditions on the Formation of Strontium Germanate Nanowires

系统分析了水热温度、保温时间对锗酸锶纳米线形成的影响。扫描电子显微镜和X-射线衍射分析结果表明水热温度和保温时间对锗酸锶纳米线的形成与生长起到了重要作用。随着水热温度的增加,锗酸锶棒状结构的长度不断增加,由无定形结构转变为了斜方SrGeO3晶相。随着保温时间的增加,锗酸锶纳米线的长度由10微米增加至了数十微米。通过晶体核化与生长机制可以解释锗酸锶纳米线的形成。

The effect of hydrothermal temperature and reaction time on the formation of the strontium germanate nanowires has been analyzed. Scanning electron microscopy and X -ray diffraction analysis show that the hydrothermal temperature and reaction time have important roles on the formation and growth of the strontium germanate nanowires. The length of the nanorod product increases and the phase of the products transforms from amorphous state to orthohombic SrGeO3 phase with the increase of the hydrothermal tempera- ture. With the increase of the reaction time, the length of the strontium germanate nanowires is increased from 10 μm to several dozens of micrometers. The formation of the strontium germanate nanowires can be explained by crystal nucleation and growth process.