Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 1 February 2002|
synthesized by sol-gel method
（Department of Metallurgy Physical Chemistry,
Northeasten Unive rsity, Shenyang 110006, China）
Abstract:The microstructures of nanosized alumina powders prepared by sol-gel routine were systematically studied with transmission electron microscopy and X-ray diffractometer. It was found that the morphologies of alumina gel powders change in t he orders of caterpillar-thorn-granular-dumbbell shaped structures during calcining at temperatures from 20℃ to 800℃, 1200℃ and 1300℃. The caterpillar shaped structure composed of strings with a diameter of 5nm.
Key words: nanosized;alumina powders;sol-gel;microstructure