INTERPRETATION OF CRYSTALLIZATION INDUCTION PERIODS
INTERPRETATION OF CRYSTALLIZATION INDUCTION PERIODS
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DOI：
10.1016/0021-9797(88)90219-6
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发表时间：
1988-05-01
影响因子：
9.9
通讯作者：
MULLIN, JW
中科院分区：
文献类型：
--
作者：
SOHNEL, O;MULLIN, JW
结晶诱导周期tn 被解释为临界核形成时间tn 和生长至可检测尺寸tg 的时间之和。考虑到不同可能的成核和生长机制，针对stn⪢tg、tn≈tg和tn⪡tg情况导出了描述tindon过饱和依赖性的表达式，并根据实验证据评估了它们的有效性。根据诱导期对溶液过饱和度的依赖性，可以推断出新相的出现是受成核（或成核后生长）控制还是仅受生长控制。在特定情况下，这种依赖性还可以揭示成核和/或生长的控制机制。除特殊情况外，非稳态成核对于无机电解质从水溶液中的沉淀并不重要。
The crystallization induction periodtind, is interpreted as the sum of the time for critical nucleus formation,tn, and growth to detectable size,tg. Expressions describing the dependence oftindon supersaturation are derived for the casestn⪢tg,tn≈tg, andtn⪡tg, taking into account different possible nucleation and growth mechanisms, and their validity is assessed on the basis of experimental evidence. From the dependence of the induction period on solution supersaturation it is possible to deduce whether the new phase appearance is governed either by nucleation (or nucleation followed by growth) or by growth alone. In specific cases the dependence can also reveal the controlling mechanisms of nucleation and/or growth. Non-steady-state nucleation is not significant in the precipitation of inorganic electrolytes from aqueous solutions, except in special cases.