The influences of possible factors on preparation and characterization of Lu₂Ti₂O₇ nano-wires

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• 作者：Bao-rang Li ; Hui Gao ; ^{gaohui6688@sohu.com} ; Jing-jing Liu ; Zhi-wei Yang
• 关键词：A1. Crystal structure ; A2. Growth from melt ; B1. Nano-materials ; B1. Rare earth compounds
• 刊名：Journal of Crystal Growth
• 出版年：2012
• 期刊代码：49_00220248
• 类别：ch
• 出版时间：15 July, 2012
• 卷：351
• 期：1
• 页码：169-175
• 文件大小：2030 K

摘要

Lu₂Ti₂O₇ nano-wires were obtained by the molten salt synthesis method. The morphology and structures were analyzed via SEM, TEM and XRD. XRD results indicated that the as-prepared products were mainly composed of Lu₂Ti₂O₇ phase besides only minor amounts of impurities. SEM and TEM results showed that the products consisted of wire-like nanostructures with 50-300 nm in diameter and several tens of micrometers in length. The selected area electron diffraction results indicated that the Lu₂Ti₂O₇ nano-wires were single crystalline. The influence of the calcinations temperature, holding time, salt species and amount on the crystallization habit and morphology of Lu₂Ti₂O₇ nano-wires was also studied in detail. Under the same processing conditions, KCl was proved to be more favorable for synthesis of Lu₂Ti₂O₇ nano-wires than NaCl. Furthermore, the calcinations temperature showed a strong influence on the formation of Lu₂Ti₂O₇ nano-wires. Both the increased salt content and prolonged annealing time also could improve the product morphology greatly.