So far, only KDP crystals can meet the requirements for laster fusion research of high power system. This experiment studied the solution stability of KDP and iron content with oxalic acid as additive. The study found that the amount of oxalic acid under 0.01 g (50 mL KDP ) is beneficial to the growth of KDP crystals without doping oxalic acid. The study also showed the amount of oxalic acid can increase the metastable zone of the KDP solution. By atomic absorption, The content of iron ions was found to reduce with the addition of oxalic acid by atomic absorption spectroscopy.%至今为止,磷酸二氢钾晶体是唯一能用于激光核聚变高功率系统之中的晶体.本实验研究了草酸掺杂下KDP溶液的稳定性和铁离子含量等.研究表明草酸的添加量在0.01 g(50 mL KDP饱和溶液)以下,结晶出来的KDP晶体不含有草酸;同时发现添加草酸后可以增大KDP溶液的亚稳区,这可能与草酸能够络合KDP溶液中的铁离子有关,原子吸收证明经草酸重结晶后的KDP晶体中铁离子含量降低.
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