碳酸钆及氧化钆纳米管的合成及表征(英文)

Synthesis and characterization of gadolinium carbonate and oxide nanotubes

为丰富稀土产品 ,拓展稀土应用领域 ,以现有稀土产品之一的碳酸钆为原料 ,通过水热结晶 ,直接合成水合碳酸钆薄壁纳米管 ,用粉末X射线衍射、热分析、透射电镜技术表征了样品的结构、形貌和热稳定性 水合碳酸钆纳米管长为数百纳米至 1 5 μm ,管径为 5 0～ 2 0 0nm ,在 6 80℃以上分解后可得体心立方晶系的氧化钆纳米管 ,尺寸和形貌未发生显著变化 该法条件温和 ,流程短 ,可作为现有湿法冶金工艺的一个部分 ,直接生产碳酸钆和氧化钆纳米管 。

Nanotubes of gadolinium carbonate hydrate were prepared through a simple hydrothermal crystallization method with commercial carbonate as precursor for the purpose of enriching rare earth products and enhancement of their applications. The nanotubes are hundreds nanometers to one and a half micrometers long and 50～200 nm wide with thin walls. The sample can easily be decomposed into body-centered cubic oxide crystalline nanotubes with almost no changes of both the size and the morphology at a lower temperature of about 680 ℃.