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首页> 外文期刊>RSC Advances >Effect of cyclohexane diamine tetraacetic acid on micro morphology of rapidly grown potassium dihydrogen phosphate crystals
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Effect of cyclohexane diamine tetraacetic acid on micro morphology of rapidly grown potassium dihydrogen phosphate crystals

机译：环己烷二胺四乙酸对快速生长的磷酸二氢钾晶体微观形貌的影响

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Potassium dihydrogen phosphate (KDP) crystals were grown from aqueous solutions with different concentrations of cyclohexane diamine tetraacetic acid (CDTA) by the “point seed” rapid growth technique. The effects of CDTA on the surface micro morphology of KDP crystals were systematically studied by atomic force microscopy. The prismatic face growth rates of KDP crystals grown from various solutions were measured by a laser polarization interference system. The results shown that the steps became smooth after CDTA doping. When the doping concentration of CDTA is 100 ppm, the bunching of steps on the (100) face reduced dramatically and the step velocity increased obviously due to the complexation between CDTA and the metal impurities in the original solution. When the doping concentration of CDTA is 500 ppm, the excess CDTA adsorbed on the growth surface and impeded the step movement, leading to an increase in step bunching and reduction in step velocity compared with the situation of 100 ppm.
机译：磷酸二氢钾（KDP）晶体是通过“点种子”快速生长技术从具有不同浓度的环己烷二胺四乙酸（CDTA）的水溶液中生长的。通过原子力显微镜系统研究了CDTA对KDP晶体表面微观形貌的影响。通过激光偏振干涉系统测量了从各种溶液中生长的KDP晶体的棱柱面生长速率。结果表明，在CDTA掺杂之后，步骤变得平滑。当CDTA的掺杂浓度为100 ppm时，由于CDTA与原始溶液中的金属杂质之间的络合，（100）面上台阶的束聚显着减少，并且台阶速度明显增加。当CDTA的掺杂浓度为500ppm时，与100ppm的情况相比，过量的CDTA吸附在生长表面上并阻碍了台阶运动，导致台阶成束增加和台阶速度降低。

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