中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 15 No. 5 October 2005 |
（1. School of Material and Metallurgy, Northeastern University,
Shenyang 110004, China;
2. Department of Applied Chemistry, Fushun Petroleum Institute,
Fushun 113001, China）
Abstract: Nanometer α- Al2O3 powders were synthesized by the method of low-temperature combustion synthesis (LCS) with aluminum nitrate nonahydrate and urea as raw materials. The prepared powders were studied by XRD, TG-DTA, FT-IR and TEM. It is found that the average size of particles is 60-80nm. The optimal synthetic conditions are obtained, i.e., the suitable fuel is urea; the molar ratio of oxidizer to fuel is 1∶2 and the igniting temperature is 700℃. The results show that the size of particles is governed by synthesizing temperature, the fuel and the molar ratio of oxidizer to fuel. TEM image of the particles collected shows that the crystal habits of particles have a spheric structure and particles are polycrystal.
Key words: low-temperature combustion synthesis; nanoparticle; α- Al2O3 powder
