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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Experimental and theoretical study of recovery mechanism of impurity effect by the addition of EDTA
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Experimental and theoretical study of recovery mechanism of impurity effect by the addition of EDTA

机译：添加EDTA回收杂质效应机理的实验与理论研究。

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The impurity effect by trivalent metal ion such as Al3+, Fe3+ and Cr3+ during crystal growth of KDP is reasonably well documented. If a metal ion is adsorbed onto the crystal surface, it prevents the step propagation relevant to the crystal growth rate. However, this impurity adsorption mechanism is still not well understood. Recently, in our work on the addition of chelate agents, a recovery effect of the metal ion adsorption was discovered. However, its recovery mechanism is not clearly understood both theoretically and phenomenally. In this research, ethylene-diamine-tetra-acetic acid, EDTA, which is the most common chelate agent, was used as a recovery agent. The recovery mechanism was considered from the correlation of experimental data and the interfacial distribution model that we proposed in our former study. Furthermore, quantum calculation of EDTA metal complex can explain the relaxation of impurity adsorption by the addition of EDTA. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译：在KDP晶体生长过程中，三价金属离子（如Al3 +，Fe3 +和Cr3 +）的杂质效应已得到充分证明。如果金属离子被吸附到晶体表面，它会阻止与晶体生长速率有关的台阶传播。但是，这种杂质吸附机理仍未很好理解。最近，在我们添加螯合剂的工作中，发现了金属离子吸附的恢复作用。但是，其恢复机理在理论上和现象上都不清楚。在这项研究中，最常用的螯合剂乙二胺四乙酸EDTA被用作回收剂。从实验数据的相关性和我们先前研究中提出的界面分布模型考虑了恢复机理。此外，EDTA金属络合物的量子计算可以解释通过添加EDTA来放松杂质吸附。 （C）2007 WILEY-VCH Verlag GmbH＆Co. KGaA，Weinheim。

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