第31卷第11期 2016年11月
文章编号：1000-324X(2016)11-1171-06
无机材料学报 Journal of Inorganic Materials
Vol. 31 No. 11 Nov.,2016
DOI:10.15541/jim20160083
稀土氮化物ScN、YN微晶的制备与表征
丛日东12，崔航"，张健，崔散良！
(1.吉林大学物理学院与超硬材料国家重点实验室，长春130012;2.河北大学河北省光电信息材料重点实验室，保定071002
摘要：利用直流电弧等离子体方法制备出稀土氮化物ScN、YN微晶，这是一种快速、低成本、高产量的新方法，可用来制备稀土金属氮化物。结构物性表征和能谱成分分析结果表明，所制备的ScN晶体为满足化学计量比的单品而YN晶体为非化学计量比的多晶，其中Y的含量高于N。综合XRD、EDS、HRTEM和PL结果分析表明，YN晶体主要由大量随机取向的单晶颗粒组成，单晶颗粒间分布着一些非晶的金属Y，光谱结果分析表明YN中存在大量的N空位。此外，对样品的微观结构形成机理进行了系统分析，由于Y族金属氮化物中有限组分较高的解离压力以及产物在生长过程中经历较高的淳火速率(10°K/s)，导致YN解离而形成的Y金属团簇的无序排列，进而使其在冷却过程中形成了非晶结构。
关键调：直流电弧等离子体方法；ScN、YN微晶；化学计量比；非晶金属Y 中图分类号：Q469文献标识码：A
SynthesisandCharacterizationofRareEarthNitrideScN
andYNMicrocrystalline
CONGRi-Dong'2,CUIHang',ZHANGJian',CUIQi-Liang
(1. Colledge of Physics and State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China; 2. Hebei Key Laboratory of Optic-electronic Information Materials, Hebei University, Baoding 071002, China)
Abstract: Rare earth nitride ScN and YN crystals were synthesized through direct nitridation of Sc and Y metals with nitrogen using plasma assisted direct current arc discharge method. This new method is fast, low cost and high yield for preparing rare earth metal nitrides, Structural and elemental characterization indicate that the as-synthesized ScN crystals are stoichiometric single crystalline and YN crystals are nonstoichiometric poly-crystalline with random orientation single crystal particles.Considering XRD, EDS, HRTEM, and PL results of YN crystals, non-crystalline phase of metal Y is deduced to be formed in YN which contributes to the high con-tents of Y inEDS results.PLspectrum shows that thepresence of large amounts of Nvacancy in YN crystals.In addition, the microstructure formation mechanism of YN and ScN samples is analyzed. The difference between them is attributed to the high dissociation pressure of ytrium-group metal nitrides of limiting compositions as well as the high quench rate (1o° K/s) that would result in the disordered arrangements of the clusters of Y atoms
and then formingnon-crystallinestructureupon quenching 收稿日期：2016-02-02；收到修改稿日期：2016-04-11
基金项目：国家自然科学基金(51172087);高等学校博士学科点专项科研基金(20110061110011);吉林大学研究生创新基金
资助项目(2015140)；河北省高等学校科学研究项目自筹资金项目(Z2015121)
National Natural Science Foundation of China (51172087); Specialized Research Fund for the Doctoral Program of Higher Education of China (20110061110011); Graduate Innovation Fund of Jilin University (2015140); College Science Research Project of Hebei Province (Z2015121)
作者简介：丛日东（1986)），男，博士，E-mail:congrd@126.com
通讯作者：崔航，博士.E-mail:cuihang@jlu.edu.cn 万方数据