摘要
以5N-Al(OH)3为原料,分别在600℃、800℃、1000℃、1200℃条件下烧成制备了高纯氧化铝粉体。运用XRD、SEM、粒度分布、比表面积等手段,研究了高纯Al2O3的结构演变过程及不同焙烧温度条件下的高纯氧化铝粉体的性能。结果表明随着焙烧温度的升高,Al(OH)3演变过程为η-Al2O3→γ-Al2O3→θ-Al2O3→α-Al2O3;烧成产物的平均粒度和比表面积逐渐减小,平均粒度从11.94μm降低至5.02μm,比表面积从249.363m2/g降低至7.973m2/g。
High purity alumina powder was prepared by pyrolysis of 5N aluminum hydroxide at temperature of 600℃, 800 ℃,1000 ℃ and 1200 ℃. The properties of the high purity alumina were studied by SEM, XRD, particle size distribution and specific surface area. Results showed that with the calcination temperature increasing the evolution process of aluminum hydroxide was η-A2O3→ γ-A2O3→ θ-A2O3→ α-A2O3, the average particle size and specfic surface area of alumina powder were decreased. The average particle size was decrease from 11.94 μm to 5.02 μm, the specific surface area was decreased from 249.363m2/g to 7.973m2/g.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2015年第11期31-34,共4页
China Ceramics
基金
贵州省工业攻关重点项目(黔科合GZ字[2012]3013)
关键词
氢氧化铝
温度
结构演变
高纯氧化铝
Aluminum hydroxide
Temperature
Structure evolution
High purity alumina
