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首页> 外文期刊>Crystal growth & design >Sodium Chloride Dihydrate Crystals: Morphology, Nucleation, Growth, and Inhibition
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Sodium Chloride Dihydrate Crystals: Morphology, Nucleation, Growth, and Inhibition

机译：二水氯化钠晶体：形态，成核，生长和抑制

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摘要

Sodium chloride powders have a strong tendency to cake at freezing temperatures, which is caused by the formation of sodium chloride dihydrate solid bridges between the powder particles. Using the crystallographic structure, the morphology of the dihydrate crystals was determined. In addition, the growth rate of the most important facets of these crystals was measured as well as the influence of a number of anticaking agents and related additives on the growth rate. A likely candidate for the inhibition of dihydrate growth was found: a mixture of iron(III) and l-tartaric acid, which probably forms a metal-organic coordination complex. The nucleation rate of the dihydrate was found to be extremely low and to increase with time. This is probably caused by the formation of a metastable prenucleation phase, which inhibits the nucleation of dihydrate crystals. The influence of the additives on the nucleation rate was found to be limited.
机译：氯化钠粉末在冷冻温度下有很强的结块趋势，这是由于在粉末颗粒之间形成了二水合氯化钠固体桥造成的。使用晶体结构，确定了二水合物晶体的形态。另外，测量了这些晶体最重要的小面的生长速率以及多种抗结块剂和相关添加剂对生长速率的影响。发现了抑制二水合物生长的可能候选物：铁（III）和1-酒石酸的混合物，其可能形成金属-有机配位络合物。发现二水合物的成核速率极低并且随时间增加。这可能是由于亚稳态预成核相的形成所致，该相抑制了二水合物晶体的成核作用。发现添加剂对成核速率的影响是有限的。

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