Abstract

Nd(OH)₃ nanorods were synthesized by chemical deposition. Thermal annealing of Nd(OH)₃ yielded Nd₂O₃. Thermal effects that accompanied phase transitions have been determined by thermal analysis and X-ray powder diffraction. Samples have been annealed at temperatures of 330, 635, and 794°C of the observed thermal events. The sizes of the obtained nanorods of neodymium compounds have been determined using scanning and transmission electron microscopy. The process of dehydration of OH groups during thermal annealing has been studied by infrared spectroscopy. Annealing of an amorphous powder at 330°C gave Nd(OH)₃ nanorods with an average length of 29 nm and a diameter of 4 nm. Annealing at 794°C led to Nd₂O₃ nanorods with a hexagonal crystal structure. The average size of nanorods increased in length to 118 nm and in diameter to 28 nm.

中文翻译：

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退火温度对沉积法合成Nd2O3纳米粒子结晶的影响

摘要

Nd(OH) ₃纳米棒通过化学沉积法合成。Nd(OH) ₃的热退火产生Nd ₂ O ₃。通过热分析和 X 射线粉末衍射已经确定了伴随相变的热效应。样品已在观察到的热事件的 330、635 和 794°C 的温度下退火。所获得的钕化合物纳米棒的尺寸已使用扫描和透射电子显微镜确定。通过红外光谱研究了热退火过程中OH基团的脱水过程。在 330°C 对无定形粉末进行退火得到 Nd(OH) ₃纳米棒，平均长度为 29 nm，直径为 4 nm。在 794°C 退火导致 Nd具有六方晶体结构的₂ O _{3纳米棒。}纳米棒的平均尺寸长度增加到 118 nm，直径增加到 28 nm。