KDP晶体的点状籽晶法生长及其缺陷研究

Point-seed Growth and Defects of KDP Crystal

研究了溶液pH值对KDP晶体生长形态的影响,进行了晶体生长实验和参数对比。以提高溶液pH值为主要手段在低过饱和度下进行KDP晶体点状生长。对点状法生长的晶体进行了缺陷分析,测定了晶体不同区域的金属离子含量并进行了对比分析。实验表明溶液pH值对晶体各向的相对生长速度有显著的影响。在pH=5.0、低过饱和度(σ<0.02)条件下生长出50×50×50mm3的晶体。

The pH value of solution influences the growth habits of KDP crystal, about which the crystal growth experiments and the parameter comparison was completed. KDP crystals were grown in the solution with low supersaturation and comparatively high pH value. The defects and the cation content in different crystal positions were analyzed. It is indicated that pH value of the solution makes an obvious effect on the relative growth speed of crystal faces. The KDP crystal with the size of 50 × 50× 50mm^3 was grown in the condition of pH =5.0 and low supersaturation（σ〈0.02）.