| 碳酸铝铵热分解制备纳米氧化铝粉体 |
| Preparation of Nanosized Alumina Powders by Pyrolysis of Ammonium Aluminium Carbonate Hydroxide |
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| 摘要: |
| 关键词: 碳酸铝铵 α-Al2O3 纳米粉体 合成 表征 |
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| Abstract: Nanosized alumina powders were prepared from Al(NO3)3·9H2O and (NH4)2CO3 through the synthesis of ammonium aluminium carbonate hydroxide (AACH) and followed by calcination. TG-DTA， XRD， TEM and BET were employed to study the process of AACH thermal decomposition and to characterize the products obtained. The results show that high purity (99.97%) and nanosized spherical α-Al2O3 powders with the diameter of 40～50nm and BET surface area 32.5m2·g-1 can be obtained by calcining AACH at 1150℃ for 1.5h， the sequence of phase transformation during calcination was AACH → amorphous Al2O3 → γ-Al2O3 → α-Al2O3， and the activation energy of AACH decomposition is (115±5)kJ·mol-1. |
| Keywords: NH4AlO(OH)HCO3 α-Al2O3 nanosized powders synthesis characterization |
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| 申小清,李中军,要红昌,张峻.碳酸铝铵热分解制备纳米氧化铝粉体[J].无机化学学报,2003,19(6):650-654. |
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