无机材料学报

• 研究论文 • 上一篇    下一篇

无机盐制备氧化铝纳米粉及其物理化学的研究

曾文明; 陈念贻+; 归林华; 王浚; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室; 上海200050; +中国科学院上海冶金研究所, 上海 200050
  • 收稿日期:1997-12-31 修回日期:1998-02-26 出版日期:1998-12-20 网络出版日期:1998-12-20

Synthesis of Al2O3 Nanopowders Using Inorganic Salt and Its Physical Chemistry

ZENG Wen-Ming; CHEN Nian-Yi+; GUI Lin--Hua; WANG Jun; GAO Lian; GUO Jing-Kun   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute ofCeramics; Chinese Academy of Sciences Shanghai 200050 China; +Shanghai Institute of Metallurgy, Chinese Academy of Sciences Shanghai 200050 China
  • Received:1997-12-31 Revised:1998-02-26 Published:1998-12-20 Online:1998-12-20

摘要: 本文以廉价的分析纯AlCl3·6H2O为原料,采用溶胶-冷冻干燥法制备出γ-AlOOH(Boehmite)粉料.经500和1100℃下煅烧,分别制得平均粒径6和30um的γ-和α-Al2O3纳米粉.同时,作出了Al-H2O系25和90℃时的电位~pH图,并采用Temkin-Schwarzman方法和回归分析手段,对Al(OH)3热分解过程进行了热力学分析·Al-H2O系的电位~pH图和Al(OH)3热分解的热力学分析,为γ-AlOOH溶胶的形成和γ-AlOOH粉料的热处理提供了一定的指导作用.

关键词: 无机盐, 制备, 氧化铝纳米粉, 物理化学

Abstract: Boehmite (γ-AlOOH) powder was first prepared by Sol-Freeze Drying method using cheap AlCl3·6H2O as raw materials, and then γ-Al2O3
nanopowder with the average diameter of 6nm and α-Al2O3 nanopowder with the mean diameter of 30nm were obtained by the calcination of the above
γ-AlOOH powder at 500 and 1100℃, respectively. The potential~pH diagrams of Al-H2O system at 25 and 90℃ were presented, separately. Thermodynamic analysis of the main reactions in the process of thermal
decomposition of Al(OH)3 was also made using Temkin-Schwarzman’s method and by means of regression analysis. Investigations of the potential-pH diagrams of
Al-H2O system and thermodynamic analysis of the thermal decomposition of Al(OH)3 provide a certain guide for the formation of boehmite sol and the
heat treatment of boehmite powder, respectively.

Key words: inorganic salt, synthesis, Al2O3 nanopowders, physicochemistry

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