Phase Transition Activity Characteristics of Nanosized AlOOH in the Hydrothermal Synthesis of nanosized α-Al2O3

摘要：

　　α-Al2O3 nanopowders were prepared by a novel synthesis process,using the nanosized α-Al2O3 obtained from pyrolyzing ammonium aluminum carbonate hydroxide as seeds and the self-dispersed nanosized AlOOH crystal powders as precursors.Based on their good self-dispersion in water.the α-Al2O3 seeds were dispersed evenly into the AlOOH sol by the new homodispersion mixing technique.This process enables the conversion of AlOOH to alumina at 190℃ (hydrothermal temperature),in which the alumina is calcined to nanosized alpha-alumina having an average length to diameter ratio of60nm:15nm at 930℃.In the synthesis reaction for transforming the AlOOH to alumina,the effect of superfine pulverization and self-dispersion of the precursors was studied.

关键词： Crystal seed hydrothermal synthesis method Boehmite α-Al2O3 powders

作者: Haida Liao Lianxiao Huang Yanbin Meng Bolin Wu Lianmeng Zhang

作者单位: State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Tech Guangxi University for Nationalities,Nanning 530006,China Guilin University of Technology,Guilin 541004,China State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Tech

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 675-678

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）