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We describe in this paper the formation of liquid inclusion induced light scatter in potassium dihydrogen phosphate (KDP) crystal and deuterated potassium dihydrogen phosphate (DKDP) crystals. The measurement has been done with an atomic force microscope (AFM). The mechanism of formation of liquid inclusion scatter has been proposed and the effect of super-saturation discussed. 相似文献
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溶液晶体生长与溶液的过饱和度及浓度变化有关。用全息实时干涉法测定KDP晶体的浓度扩散层和晶面浓度,以观察浓度变化,这对培育优质单晶提供了有用的实测方法。 相似文献
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为了克服单独应用遗传算法或BP算法调节模糊神经网络控制器参数时存在的缺陷,提出了一种将二者复合的方法,即在传统的GA中加入一个BP算子,以充分利用二者各自的优点。而在GA中引进了动态的交叉和变异率,在BP中引进动态的学习率,从而更有效地提高其收敛速度和执行效率。计算机仿真结果表明,用该复合算法调节的模糊神经网络控制器的性能明显优于传统的算法调节的控制器。 相似文献
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用激光衍射技术对晶体界面的生长速率进行实时测定。该技术简单、直观、速度快、精度高,文中叙述了测试技术的基本原理、方法、精度等。 相似文献
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引言自史前时代以来,单晶宝石因美丽和稀有被视为珍宝.十九世纪后期随着固态物理学研究的需要,对单晶生长的研究和应用提出了崭新的要求.大量的研究表明,晶体在生长过程中,决定晶体生长速度的是扩散,扩散速度由Fick定律给出 相似文献
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The molecular structures and its evolutive regularities within the boundary layers in the crystal growth of KDP and DKDP have been studied in real time by using holography and Raman mi-croprobe. The experiments show that the molecular structure of mother solution within the boundary layers is distinctly different from that of the solutions alone. In this paper, the effects of cations within the boundary layers on the structure of solution are considered. Within the characteristic boundary layers, the effects of cations cause the changes in O-P-O bond angle, electronic density redistribution of the phosphate groups, and significant changes in the bond intensity, thus leading to the breaking of partial hydrogen bonds of the phosphate associations, the readjustment of geometry of anionic phosphate groups and desolvation, and the forming of the smectic ordering structure of the anions-cations. Finally, the crystallization unit of anion-cation should be formed at the proximate interface. 相似文献
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