Effect of Lithium Nitrate on the Structure and Property of α-Al2O3 Platelets Prepared via Solid-stat

• 作 者: Miao Zhuang Shi Jiangong Miao Qingyuan Hao Jianwei Zhang Yi Zhang Wenping
• 机 构: SINOPEC Catalyst Beijing Co. Ltd.,Beijing,102500;National Laboratory of Flame Retardant Materials, N
• 出 处: 中国炼油与石油化工（英文版）
• 发表日期: 2017年2期
• 关键词: solid-state reaction α-Al2O3 platelets LiNO3 property

The α-Al2O3 platelets were prepared via solid-state reactions and the effect of the amount of lithium nitrate additive on the property of the platelets was investigated. The ICP results indicated that the high temperature calcination process resulted in a large loss of lithium species because of volatilization, but there was still a small amount of residual lithium species in the α-Al2O3 platelets. The SEM micrographs showed that lithium nitrate led to decrease in the thickness of α-Al2O3 platelets and irregular morphology of aggregates. Pore structures results exhibited that addition of lithium nitrate led to decrease in the pore size and increase in the specific surface area of aggregates of α-Al2O3 platelets. The XRD and IR patts suggested that the residual lithium and aluminum oxide formed LiAl5O8. The existence of LiAl5O8 was the basic reason for the changed performance of α-Al2O3 platelets.