温度对爆轰法合成纳米氧化铝晶型及晶粒度的影响

基金项目:

国家自然科学基金(10172025)

辽宁省自然科学基金资助项目

详细信息

Effect of Temperature on Crystal and Crystal Granularity of Nanometer Aluminum Oxide Synthesized by Detonation

1. State Key Laboratory of Structural Analysis for lndustry Equipment, Dalian University of Technology, Dalian 116023, China;
2. Dalian Petrochemical Corporation of Chinese Petroleum, Dalian 116023, China

摘要: 用爆轰法合成了纳米γ氧化铝粉体。对粉体分别进行从室温加热到600℃、800℃、900℃、1000℃、1100℃和1300℃的煅烧处理,对煅烧样品进行了X射线衍射分析,研究了不同煅烧温度下,纳米氧化铝的晶粒度。结果表明,随煅烧温度的升高,纳米氧化铝经历了从γ型转变成δ型,再转变成θ型,最后完全转变成α型纳米氧化铝的过程。随着加热温度的升高,纳米氧化铝出现了晶粒细化现象,且晶粒细化有两个过程,细化程度最大的温度区间为800~1000℃。
- 爆轰法合成 /
- 纳米氧化铝 /
- 晶粒度 /
- 细化
Abstract: Globular nanometer γ aluminum oxide powder was synthesized through detonation of aluminum nitrate.The experimental powder samples were heated from room temperature to 600℃、800℃、900℃、1000℃、1100℃ and 1300℃ respectively for sintering,and then were analysed by means of XRD to investigate the crystal granularity of the powder samples sintered at different temperature.The curves of XRD manifested that with the sintering temperature rising,the aluminum oxide changed from γ to δ,then to θ,and then to α and the grain of the nanometer aluminum oxide was refined.The most grain refinement appeared at 800~1000℃.
- Detonation synthesis /
- Nanometer aluminum oxide /
- Crystal granularity /
- Grain refinement