Ca2+是KDP原料中一种常见的杂质离子, 通过传统降温法和“点籽晶”快速生长法研究了Ca2+离子对KDP晶体生长习性及性能的影响. 实验表明, Ca2+低浓度掺杂时对溶液的稳定性及生长过程没有明显的影响; 高浓度时溶液稳定性有所降低, 经常出现杂晶; 快速生长时, 晶体柱面易出现包藏, 晶体的紫外透过呈下降趋势, 晶体中散射颗粒密度随掺杂浓度的增加而增大.
Ca2+ ion is a kind of common impurity in the growth process of KDP crystal. Effect of Ca2+ ions on the growth habit and optical properties of KDP crystals were investigated. KDP crystals were grown from a solution containing certain quantity of calcium chloride by the traditional temperature-lowering method and by the “point seed” technique, respectively. The results show that there is no obvious effect on the stability of KDP growth solution and the process of KDP growth when the Ca2+ concentration in the solution is very small. When the Ca2+ concentration is high in the solution, the stability of KDP growth solution is lowered, and inclusions in the crystal often occur on the prismatic faces of KDP crystals grown by a “point seed” technique. The ultraviolet transmittance is descended and the density of scattering particles in the crystal is increased with the Ca2+ concentration in the solution.
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