阴离子掺杂对KDP晶体光散射的影响  

Effects of Anionic Impurities on the Light Scatter in KDP Crystal

作　　者：张建芹[1] 王圣来[1] 房昌水[1] 孙洵[1] 顾庆天[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100

出　　处：《无机材料学报》2007年第2期268-272,共5页Journal of Inorganic Materials

基　　金：国家"863"惯性约束核聚变领域资助项目(59823003);山东省博士基金

摘　　要：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-、NO3-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NO3-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 sulphate, 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 SO4^2-, NO3 and Cl^- ions on light scatter in the crystals were studied. Results show that SI4^2- 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.

关 键 词：掺杂剂 KDP晶体 超显微法 光散射 

分 类 号：O782[理学—晶体学]