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Nanocrystallization of CaCO_3 at solid/liquid interfaces in magnetic field: A quantum approach

机译：磁场中固/液界面处CaCO_3的纳米晶化：一种量子方法

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摘要

With the application of 1.2 T external magnetic field, 90% of CaCO_3 soluble molecules in water flow precipitate on stainless steel 316 solid/liquid interface in the form of aragonite/vaterite. The magnetic field increases locally the thermodynamic potentials at interface, favoring the formation of aragonite than calcite, despite the fact that the field-free ground electronic state of aragonite is situated higher than of calcite. A quantum mechanical model predicts that magnetic fluctuations inside the liquid can be amplified by exchanging energy with an external magnetic field through the angular momentum of the water molecular rotors and with the macroscopic angular momentum of the turbulent flow. The theoretical model predicts that the gain is higher when the magnetic field is in resonance with the rotational frequencies of the molecular rotors or/and the low frequencies of the turbulent flow and that aragonite concentration is increasing at 0.4 T in agreement with the experimental results. Contrary to calcite, aragonite binds weakly on flow surfaces; and hence the process has significant industrial, environmental and biological impact.
机译：通过施加1.2 T外部磁场，水流中90％的CaCO_3可溶性分子以文石/球v石的形式沉淀在316不锈钢固/液界面上。尽管文石的无场基态电子态比方解石高，但磁场会局部增加界面处的热力学势，比文石更有利于文石的形成。量子力学模型预测，通过与外部磁场通过水分子转子的角动量与湍流的宏观角动量交换能量，可以放大液体内部的磁波动。理论模型预测，当磁场与分子转子的旋转频率或/和湍流的低频共振时，增益会更高，文石的浓度在0.4 T时会增加，与实验结果一致。与方解石相反，文石在流动表面上的结合较弱。因此该过程具有重大的工业，环境和生物影响。

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