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文摘
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将光学干涉技术与显微技术相结合，应用计算机技术、图像处理技术发展形成一种实时细观诊断的实验方法——光学细观干涉诊断技术；实时观测了KCl晶体在容积为3mm * 3mm * 4.5mm的生长池内的结晶过程，得到了该过程的晶体的表面形貌、生长速率、以及晶体生长尺寸与时间、浓度与时间的定量的关系，观测到由重力引起的浮力对流现象，它直接影响晶体的生长。实验表明重力对晶体生长形态有很大的影响；生长速率与浓度存在很大的依赖关系。 |
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其他语种文摘
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An optical diagnostic system consisting of the Michelson interferometer and the Mach-Zehnder interferometer with microscope, computer and image processing has been developed for the study of the crystal growing in situ. The experimental setup is at first described in detail. The crystallization process of KCl crystal has been investigated in a growth cell of 3 mm * 3 mm * 4.5 mm. The surface pattern, the growth rate and concentration gradient in the aqueous solution were measured by this were diagnostic system. The surface deformation of the growing crystal has been calculated from the Michelson interference fringes according to the calculation method of grating. The growth rate has been determined by the surface deformation at different moment, and the relationship between the growth rate and time has been given in this paper. The concentration change through out the crystalization was visualized by Mach-Zehnder fringes. It proved that the convection (a plume flow) existed in the crystalization. The buoyancy convection due to the gravity has been proved to influence crystal growth directly. These experiments further more demonstrated that the gravity is an important factor in crystal growing, and the growth rate is heavily dependent on the concentration gradient of aqueous solution. |
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来源
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力学学报
,2002,34(3):463-468 【核心库】
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关键词
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浓度场
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传质过程
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晶体生长
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干涉测量
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地址
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中国科学院力学研究所, 国家微重力实验室, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0459-1879 |
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学科
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力学 |
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基金
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中国博士后科学基金
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国家攀登计划项目
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国家自然科学基金
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文献收藏号
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CSCD:1013859
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