选用硫酸钾、硝酸钾和氯化钾作为掺杂剂, 采用传统降温法和“点籽晶”快速法生长了磷酸二氢钾(KDP)晶体, 利用超显微法对KDP晶体中的散射颗粒进行了观察, 研究了SO42- 、NO 3- 和Cl - 三种阴离子掺杂对晶体中光散射的影响. 结果表明, 掺杂后SO42-造成晶体光散射的轻度增加; 而NO 3 -和Cl - 离子掺杂后, 对于传统降温法所得晶体, 散射明显加重, 对于“点籽晶”快速法所得晶体的散射影响不大.
potassium nitrate and potassium chloride were chosen as additives. KDP crystals were grown from the aqueous solution by the traditional temperature-lowering method and a “point seed” rapid method. Scatter particles are an important parameter to evaluate the properties of KDP crystals. Light scatter was detected with an ultramicroscopic method. The effects of SO42- , NO3- and Cl- ions on light scatter in the crystals were studied. Results show that SO42- ions have a little effect on the light scatter of KDP crystals and the scatter particles are in a low density. With the increase of the dopant concentration, the density of scatter particles increases a little. For KDP crystals grown by the traditional temperature-lowering method, the existence of NO3- and Cl- ions aggravates the light scatter in KDP crystals severely. The effect on the light scatter of KDP crystals grown by “point seed” rapid method is not evident.
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