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| 1 | Pulling growth technique towards rare earth single crystals显示文摘Pulling growth technique serves as a popular method to grow congruent melting single crystals with multiscale sizes ranging from micrometers to centimeters.In order to obtain high quality single crystals,the crystal constituents would be arranged at the lattice sites by precisely controlling the crystal growth process.Growing interface is the position where the phase transition of crystal constituents occurs during pulling growth process.The precise control of energy at the growing interface becomes a key technique in pulling growth.In this work,we review some recent advances of pulling technique towards rare earth single crystal growth.In Czochralski pulling growth,the optimized growth parameters were designed for rare earth ions doped Y_3Al_5O_(12)and Ce:(Lu_(1-x)Y_x)_2Si O_5on the basis of anisotropic chemical bonding and isotropic mass transfer calculations at the growing interface.The fast growth of high quality rare earth single crystals is realized by controlling crystallization thermodynamics and kinetics in different size zones.On the other hand,the micro pulling down technique can be used for high throughput screening novel rare earth optical crystals.The growth interface control is realized by improving the crucible bottom and temperature field,which favors the growth of rare earth crystal fibers.The rare earth laser crystal fiber can serve as another kind of laser gain medium between conventional bulk single crystal and glass fiber.The future work on pulling technique might focus on the mass production of rare earth single crystals with extreme size and with the size near that of devices. | SUN CongTing XUE DongFeng | 2018 | Science China(Technological Sciences)2018，61，9： | 10 |
| 2 | Searching for novel materials via 4f chemistry显示文摘4f chemistry studies the chemical bonding characteristics of fifteen lanthanide (Ln) elements in the periodic table and their wide applications in materials sciences and engineering, which forms the scientific fundamentals ofⅥperiodic elements in the periodic table of elements. Orbital hybridization modes of Ln elements clarify their chemical bonding nature in all reaction systems. Wide coordination number (CN) option, ranging from 2 to 16, is the reason why Ln elements are the treasure of new materials, therefore, searching for novel materials may be well carried out via the rational design of coordination environment of central Ln cations to stabilize their variable energy states. Balance utilization of Ln elements is dependent on their coordination architecture in the crystallographic frame, Ln elements can be replaced by non-Ln elements when CN <10, and when CN≥10 expensive Ln elements can be replaced by those cheaper ones. | Congting Sun Keyan Li Dongfeng Xue | 2019 | Journal of Rare Earths2019，37，1： | 9 |
| 3 | 4f chemistry towards rare earth materials science and engineering显示文摘The big challenge in rare earth(RE)resource utilization is to effectively manage their balanced use and advanced applications of 17 elements(Sc,Yand La-Lu)[1,2].As a family,RE materials possess outstanding optical,electronic,and magnetic properties owing to the unique valence electron structure of RE elements,especially the 4f electrons[3].With increasing demands of modern applications,the | XUE DongFeng SUN CongTing | 2017 | Science China(Technological Sciences)2017，60，11： | 8 |
| 4 | Chemical bonding in micro-pulling down process: High throughput single crystal growth显示文摘The micro-pulling down (MPD) method is a high-efficiency crystal growth technique from melt, which has been invented by French scientist Ricard in 1975 [1] and developed by Japanese scientist Fukuda since 1992 [2] and French scientist Lebbou in 2000s [3]. Appropriate configuration of a die at the crucible bottom and the proper selection of temperature gradient allow the crystal shape control during growth of crystals with the cross section of 0.1–10 mm without mechanical and thermal stresses [2]. MPD growth method is an economical and quick single crystal growth technique, which may be used for high throughput screening novel rare earth optical crystals [4,5]. | SUN CongTing XUE DongFeng | 2018 | Science China(Technological Sciences)2018，61，11： | 7 |
| 5 | Multisize and multiweight effects in materials science and engineering显示文摘Materials mainly refer to the matters with a certain composition,structure,and property,which can be formed by natural mineralization or artificial manufacture and are widely used in various specific fields,therefore,materials serve as the substance basis for human survival and development [1]. | SUN CongTing XUE DongFeng | 2019 | Science China(Technological Sciences)2019，62，4： | 6 |
| 6 | Solution-based Chemical Strategies to Purposely Control the Microstructure of Functional Materials显示文摘Micro/nanostructured crystals with controlled architectures are desirable for many applications in optics, electronics,biology,medicine,and energy conversions.Low-temperature,aqueous chemical routes have been widely investigated for the synthesis of particles,and arrays of oriented nanorods and nanotubes.In this paper,based on the ideal crystal shapes predicted by the chemical bonding theory,we have developed some potential chemical strategies to tune the microstructure of functional materials,ZnS and Nb_2O_5 nanotube arrays,MgO wiskers and nestlike spheres,and cubic phase Cu_2O microcrystals were synthesized here to elucidate these strategies.We describe their controlled crystallization processes and illustrate the detailed key factors controlling their growth by examining various reaction parameters.Current results demonstrate that our designed chemical strategies for tuning microstructure of functional materials are applicable to several technologically important materials,and therefore may be used as a versatile and effective route to the controllable synthesis of other inorganic functional materials. | Fei LIU Congting SUN Chenglin YAN Dongfeng XUE | 2008 | Journal of Materials Science & Technology2008，24，4： | 4 |
| 7 | Hybridization: A Chemical Bonding Nature of Atoms显示文摘结合的模式和几何学能用作中央阳离子的化学结合性质,它是实质上坚定的由原子轨道杂交。在这个工作,我们根据一个原子的电子领域的定量分析集中于中央阳离子的可能的化学结合计划。从被原子价电子占据的外部原子 orbitals 的杂交开始,我们象可能的分子的几何学一样在周期表和相应协作数字学习了原子的可能的轨道的杂交计划。根据不同混合轨道的集合,中央阳离子的化学结合能被分类进三种典型类型,导致有从 2 ~ 16 的许多协作数字的阳离子。由于不同杂交模式,在 IA 和 IIA 组的阳离子的最高的协作数字比在 IB-VIIIB,组,和协作 lanthanide 元素数的大是很丰富的。我们也选择了 NaNO 3, Fe (没有 3)39H2 O, Zn (没有 3)26H2 O, Y (没有 3)33H2 O,和 La (没有 3)36H2 证实在化学结合特征和轨道的混血儿之间的直接关系的例子由红外系列设定的 O。现在的学习打开门根据杂交和愿望揭示原子的化学结合性质在原子水平在结构的设计提供理论指南。 | Dongfeng Xue Congting Sun Xiaoyan Chen | 2017 | Chinese Journal of Chemistry2017，35，9： | 3 |
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