摘要
阐述了在铝酸钠溶液加晶种分解的动力学研究中充分利用粒度分布信息的意义。通过分析铝酸钠溶液加晶种分解过程中固相产物的粒度分布情况,提出用(dN/dt)_(成核),(dN/dt))(附聚)和(dr/dt)_(径向长大)分别表示二次成核、附聚长大和晶粒径向长大的速率,并分别得到了其速率表达式,采用微分法研究了晶粒径向长大,结果表明通过控制适当的反应条件,能够突出晶粒径向长大这一基本过程。利用粒度分布信息求得的晶粒径向长大速率与实际长大速率基本一致。
In this article, significance of making use of the particle size distribution is stated.
According to the size distribution information on sodium aluminate seeded precipitation, the
speed rate expression of each basic process, which is secondary nucleation, agglomeration
and grain growth on the seeded precipitation, is obtained. Differential method is adopted to
study the radial growth of grain. It appears that the process of the radial growth of grain is
stood out through controlling reaction conditions, and the growth rate which is gained by us-
ing particle size distribution information in the experiments is consistent with the fact growth
rate.
出处
《广东有色金属学报》
2003年第1期21-26,共6页
Journal of Guangdong Non-Ferrous Metals
基金
国家重大基础研究发展规划项目(G19990649)
国家自然科学基金(59874031)
