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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Preparation of strontium chloride hexahydrate by batch-cooling crystallization: Control of crystal size and morphology
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Preparation of strontium chloride hexahydrate by batch-cooling crystallization: Control of crystal size and morphology

机译：分批冷却结晶法制备六水合氯化锶：晶体尺寸和形貌的控制

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摘要

The effects of initial supersaturation, cooling rate, and stirring rate on the morphology of strontium chloride hexahydrate (SrCl_2·6H_2O) crystals were investigated by batch-cooling crystallization, providing optimal operating conditions. Uniform needle-like crystals with a length of 1200.50 μm and a width of 100.92 μmon averagewere obtained. The corresponding aspect ratio of length to width was about 11.90. Moreover, the morphological modification of SrCl_2·6H_2O crystals using cetyltrimethylammonium chloride (CTAC) was studied. When 20.30 mmol·L~(-1) of CTAC was added, the length and width of crystals were 792.71 μm and 233.25 μm, respectively, and the corresponding aspect ratio decreased to 3.40. The shape of SrCl_2·6H_2O crystal changed to granule-like, probably because of the strong interaction of CTAC with the SrCl_2·6H_2O facets with a denser distribution of Cl~-ions. This study offers a simple, flexible, and highly efficient approach to regulate the morphology of SrCl_2·6H_2O crystals and opportunities for multiple applications of SrCl_2·6H_2O.
机译：通过分批冷却结晶研究了初始过饱和度，冷却速率和搅拌速率对六水合氯化锶（SrCl_2·6H_2O）晶体形态的影响，提供了最佳操作条件。获得了平均长度为1200.50μm，平均宽度为100.92μmon的均匀的针状晶体。相应的长宽比为约11.90。此外，研究了十六烷基三甲基氯化铵（CTAC）对SrCl_2·6H_2O晶体的形貌改性。加入20.30mmol·L〜（-1）CTAC时，晶体的长和宽分别为792.71μm和233.25μm，相应的长宽比降至3.40。 SrCl_2·6H_2O晶体的形状变为颗粒状，可能是因为CTAC与SrCl_2·6H_2O晶面之间的强相互作用，且Cl〜离子分布较密。这项研究提供了一种简单，灵活且高效的方法来调节SrCl_2·6H_2O晶体的形态，并为SrCl_2·6H_2O的多次应用提供了机会。

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