大尺寸氧化物功能晶体的熔体结构研究进展  

Recent Advances and Perspectives on Melt Structures of Large-Size Functional Oxide Crystals

作　　者：刘锋 陈昆峰 彭超[1] 薛冬峰 LIU Feng;CHEN Kunfeng;PENG Chao;XUE Dongfeng(Multiscale Crystal Materials Research Center,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;State Key Laboratory of Crystal Materials,Institute of Novel Semiconductors,Shandong University,Jinan 250100,China)

机构地区：[1]中国科学院深圳先进技术研究院多尺度晶体材料研究中心,广东深圳518055 [2]山东大学新一代半导体材料研究院晶体材料国家重点实验室,济南250100

出　　处：《硅酸盐学报》2023年第2期332-344,共13页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金委重点项目(51832007);山东省自然科学基金重大基础研究项目(ZR2020ZD35);山东省产业技术研究院研发项目(Z1250020005);山东大学齐鲁青年学者。

摘　　要：大尺寸功能晶体氧化物广泛应用于军事、高端制造、医疗等领域。熔体的结构和性质对于生长大尺寸高质量的功能晶体而言十分关键。本文综述了氧化铝、钇铝石榴石、铌酸锂等典型氧化物晶体的熔体结构特征。研究表明这几种熔体中都存在几种由金属阳离子与氧离子配位形成的不同多面体结构基元,这些结构基元的配位数、键长、空间结构以及各种基元数量的相对占比与晶体中的存在显著差异,并且结构基元的种类和占比与温度具有一定关联关系。在熔体中,这些结构基元相互连接形成网状结构,阴阳离子都可以作为节点在熔体中连接结构基元多面体。相变和熔体结构动态转变反映了晶体生长的热力学和动力学过程,揭示结构相变和熔体的结构演变动力学过程将有助于从深层次理解大尺寸晶体的实际生长机理。在生长界面处诱导形成特定熔体结构基元,构筑长程、均一的介尺度化学键合结构,有助于实现高品质大尺寸晶体生长。The structure of melt is very important for the growth of high-quality large-size functional oxides,which are such materials widely used in military,high-tech manufacturing,and medical treatment.The structures for three typical functional oxide melts,such as oxide alumina,yttrium aluminum garnet,and lithium niobate have been reviewed in this paper.Several coordination units formed by cations and anions exist in each melt,and the coordination number,bond length,spatial structure and the percentage of various coordination units in the melts are obviously different from those in the corresponding crystals.The properties of these structure units are dependent on temperature.The coordination units connected with each other by the nodes.Both the cations and anions in the melts can be acted as nodes to connect the coordination units(polyhedron) in the melts.Phase transition is the kinetic process of melt structure transformation.Therefore,in addition to the melt structure,revealing the melt structure evolution kinetic process will help to understand the growth mechanism of large-sized crystals from a deep level.

关 键 词：熔体结构 结构基元 网络结构 大尺寸 氧化物晶体 

分 类 号：O754[理学—晶体学]