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快速生长大尺寸KDP单晶 总被引:3,自引:2,他引:1
WANG Bo 许心光 WANG Sheng-lai 孙洵 GU Qing-tian 李毅平 FANG Chang-shui 梁晓亮 FENG Yu 《人工晶体学报》2008,37(4):1042-1043
用传统降温法生长了大尺寸KDP单晶,生长速度一般在1~2 mm/d,周期长,风险大.本文采用"点籽晶"快速生长法多次成功生长出了200 mm级的大尺寸KDP单晶,晶体生长速度达到20 mm/d,晶体生长正常.同时,摇摆曲线表明快速生长的晶体有着很好的结构完整性. 相似文献
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采用有籽晶的高压垂直布里奇曼法(HPVB)生长了直径35 mm的大尺寸CdSe单晶.使用X射线衍射仪测试了晶体的结晶质量,结果表明生长的晶体为纯六方相CdSe单晶,(002)晶面的摇摆曲线峰型尖锐且对称性好,峰值半高宽(FWHM)可达0.082°.使用辉光放电质谱法(GDMS)、霍尔效应测试、傅里叶变换红外光谱仪(FTIR)对晶体生长轴向的微量杂质含量及分布、电学性能和光学性能进行测试和分析,结果表明微量杂质在晶体轴向方向呈现出不同的分凝特性,杂质的不均匀分布影响晶体的电学性能和光学性能.晶体呈现出较高的电阻率(108Ω· cm)和优良的红外透过性能,在8~12 μm范围内平均透过率约为70;,吸收系数小于0.058 cm-1. 相似文献
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Guohui Li Liping Xue Genbo Su Zhengdong Li Xinxin Zhuang Youping He 《Crystal Research and Technology》2005,40(9):867-870
Potassium Chloride (KCl) and Ethylene diamine tetraacetie acid (EDTA) as new additives were added into the KDP solutions in a small amount (5M% and 0.01M% respectively). The solubility curve and metastable zone width of KDP solution with 5M%KCl was determined and we explained the mechanism of rapid growth of KDP crystal with KCl additve. The clear transparent crystal of KDP with a dimension of 54 × 54 × 42 mm have been grown rapidly by cooling solution method in 2 days. The crystal grown from additives added solution was subjected to optical transmission and laser damage threshold studies as compared with the crystal grown by traditional growing method. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Shengjun Zhu Shenglai Wang Jianxu Ding Guangxia Liu Xinguang Xu 《Crystal Research and Technology》2013,48(6):400-407
By altering the concentration of a new additive ‐ diethylene triamine pentacetate acid (DTPA) in the growth solution, a series of KDP crystals were obtained by the “point seed” rapid growth method. The growth rates up to about 20 mm/day. Effects of DTPA on the growth habit and optical properties of these as‐grown KDP crystals were investigated. The results reveal that, with the increase of DTPA concentration in growth solution, the contents of impurity metal ions incorporated into crystal and aspect ratio of crystal morphology were both decreased gradually, while the UV transmittance of crystal was enhanced continually. In the presence of moderate concentration of DTPA (100–200 ppm), the solution stability was increased and optical properties of crystal (including optical homogeneity, light scattering and laser damage threshold) were all improved. However excessive doping (>500 ppm) has opposite effects. The impact mechanism was also analyzed combining with the structure of KDP crystal and chemical characteristics of DTPA molecular. 相似文献
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Guozong Zheng Genbo Su Xinxin Zhuang Xiuqin Lin Zhengdong Li 《Crystal Research and Technology》2008,43(8):811-816
KDP crystals were rapidly grown from solution doped with different Ba2+ concentrations. The effects of Ba2+ on the growth rate, morphology and quality of KDP crystals were discussed. Significant changes in shapes and volume of the grown crystals have been observed. During the growth process, defect region expands gradually with the increasing Ba2+ concentration. Samples were cut from different parts of the as‐grown crystals for investigating the optical quality, including transmission spectrum, scattering centers. Through comparison, it is found that the nonuniform distribution of Ba2+ ions causes remarkable difference in optical quality between prismatic and pyramidal sectors. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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采用垂直无籽晶气相法(VUVG)生长出尺寸达26 mm×45 mm的CdSe单晶体,对CdSe晶体的稳态气相生长速率进行了深入讨论.采用气相升华法提纯后的CdSe多晶原料的X射线粉末衍射谱与PDF卡片值(65-3436)吻合,生长出的单晶体{100}和(110)面XRD衍射峰尖锐,无杂峰,且{100}面出现3级衍射峰.晶锭密度为5.74 g/cm3,与理论计算值接近.退火处理后的晶片在1000~7000 cm-1 红外波段范围内透过率达到70;.采用VUVG法生长的CdSe单晶体,结晶性能好、结构致密、尺寸大和红外透过率高,可用于制备红外非线性光学器件. 相似文献
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Bing Teng Xiaobing Li Dongjuan Wang Degao Zhong Qingguo Wang Yanshuai Zhao Zhenghe Yu Shaou Chen 《Crystal Research and Technology》2009,44(6):647-651
The coniform bottom device was designed and used in the rapid growth process of KDP crystal. A seed support rack was also designed to be used in rapid growth of KDP crystal to avoid spontaneous nucleation on the interface of seed crystal and rack. The KDP crystals were fast grown at the growth rate of up to 25 mm/day. The optical scatter centers in KDP crystals were observed and their transmissions of different parts were measured. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献