Synthesis and characterization of single-crystalline phase Li-伪-Sialon

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• 作者：Juntong Huang^a ; ^b ; Yangai Liu^a ; ^{liuyang@cugb.edu.cn} ; Minghao Fang^a ; Zhaohui Huang^a ; Hongyu Li^a ; Shaowei Zhang^b ; Jingzhou Yang^a ; Saifang Huang^a
• 关键词：A. Powders ; solid state reaction ; B. X-ray methods ; D. Sialon ; Retarding vaporization of lithium
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：May, 2012
• 卷：38
• 期：4
• 页码：3391-3395
• 文件大小：683 K

摘要

Single-crystallize phase Li-伪-Sialon with equiaxial morphology has been successfully synthesized by solid state reaction at 1700 掳C for 1 h under a N₂ atmosphere. The effects of additions SiO₂ and Al₂O₃, holding time at 1050 掳C and packing powders, on the phase compositions and Li contents of products have been investigated by XRD, SEM, EDS and ICP-OES. The results showed that additions SiO₂ and Al₂O₃, holding time at 1050 掳C and packing powders played an important role in retarding the vaporization of lithium and forming Li-伪-Sialon, where the former two ways were by formation of more Li-containing liquid while the latter was by providing a source of Li-containing vapor and increasing partial pressure of Li in the surrounding gaseous environment resulting in preventing volatilization of Li from the sample. However, there were more or less AlN, AlSi_0.5O_2.5, 尾-Sialon present in the products when these factors were ignored.